Entries |
Document | Title | Date |
20080229760 | MULTI-STAGE PULSE TUBE CRYOCOOLER WITH ACOUSTIC IMPEDANCE CONSTRUCTED TO REDUCE TRANSIENT COOL DOWN TIME AND THERMAL LOSS - The cool down time for a multi-stage, pulse tube cryocooler is reduced by configuring at least a portion of the acoustic impedance of a selected stage, higher than the first stage, so that it surrounds the cold head of the selected stage. The surrounding acoustic impedance of the selected stage is mounted in thermally conductive connection to the warm region of the selected stage for cooling the acoustic impedance and is fabricated of a high thermal diffusivity, low thermal radiation emissivity material, preferably aluminum. | 09-25-2008 |
20080236176 | Drive Arrangement For Rotary Valve In A Cryogenic Refrigerator - A cryogenic refrigerator comprising a rotary valve which controls the flow of high pressure gas into the refrigerator and the return of the gas from the refrigerator, the cryogenic refrigerator further comprising rotary fluid motor arranged to drive the rotary valve. | 10-02-2008 |
20080245077 | Multiple Rotary Valve For Pulse Tube Refrigerator - A rotary disc valve unit and refrigerators containing a rotary disc valve unit that has multiple valves, in which at least one rotary valve has ports connecting to the regenerator and at least one rotary valve has ports connecting to the warm ends of one or more pulse tubes where the rotary valve with ports for the regenerator has lighter contact than the rotary valve with ports for the pulse tubes. The valve face is divided into an inner area with ports for the pulse tubes and an outer area with ports for the regenerator, the inner area having a greater sealing pressure than the outer area. | 10-09-2008 |
20080256958 | Pulse tube cryocooler - A pulse tube cryocooler used under a non-vacuum atmosphere, the pulse tube cryocooler includes a pressure wave generator configured to generate pressure wave in an operations gas; a first stage regenerator having a high temperature end connected to the pressure wave generator; a second stage regenerator having a high temperature end connected to the first stage regenerator; a first stage pulse tube having a high temperature end and a low temperature end, the high temperature end being connected to a first buffer tank, the low temperature end being connected to a low temperature end of the first stage regenerator; a second stage pulse tube having a high temperature end and a low temperature end, the high temperature end being connected to a second buffer tank, the low temperature end being connected to a low temperature end of the second stage regenerator; a first stage cooling stage provided in a position where the first stage regenerator and the first stage pulse tube are connected; and a second stage cooling stage provided in a position where the second stage regenerator and the second stage pulse tube are connected. | 10-23-2008 |
20080264071 | Pulse-tube refrigerating machine - A pulse-tube refrigerating machine includes: a compressor that pressurizes a refrigerant gas; a regenerator tube accommodating a regenerator material therein; a pulse-tube having of a hollow cylinder through which the refrigerant gas flows; an intake valve and an exhaust valve provided between the compressor and the regenerator tube. A heat-shielding material is provided to at least a portion of at least one of a first wall forming a portion of the pulse-tube and a second wall contacting a portion of the pulse-tube. | 10-30-2008 |
20080276625 | Acoustic Power Transmitting Unit for Thermoacoustic Systems - An acoustic power transmitting unit for thermoacoustic systems includes at least one stage provided with at least two thermoacoustic units each of which includes a regenerator or a stack and two heat exchangers, an acoustic resonator including a tube and containing a fluid and in which a magnetic field having high impedance and low-impedance areas is arranged, wherein certain thermoacoustic units are placed in high dimensionless impedance areas. Each high dimensionless impedance area also includes a thermoacoustic unit, wherein two successive thermoacoustic units are always separated by low dimensionless impedance. The resonator includes a reduced diameter section between each couple of successive thermoacoustic units and each cross-sectional narrowing is associated with at least one by-pass which includes a deviation cavity and makes it possible to deviate the major part of a volume flow rate. | 11-13-2008 |
20080276626 | Regenerative cryocooler and pulse tube cryocooler - A regenerative cryocooler, the regenerative cryocooler being connected to a compressor configured to make coolant gas have a high pressure, send the high pressure coolant gas, and absorb coolant gas having a low pressure, the regenerative cryocooler includes a cooling stage having a regenerative material and connected to a cylinder member, the cylinder member being where the coolant gas flows, the coolant gas repeating compression and expansion; and a reinforcing member configured to prevent vibration of the cooling stage. | 11-13-2008 |
20080282707 | Cryocooler with moving piston and moving cylinder - A thermal-cycle cryocooler, such as a Stirling-cycle cryocooler, has a single working volume that is utilized by both the compressor and the displacer. The compressor and the displacer have respective movable parts, one of which is surrounded by the other. One of the parts may be a piston, a portion of which moves within a central bore or opening in a cylinder that is the other movable part. The piston may be a component of the compressor and the cylinder may be a component of the displacer, or vice versa. The working volume is located in part in a bore of the cylinder, between the piston and a regenerator that is coupled to the cylinder. Movements of either the piston or the cylinder can directly (i.e. without the use of a gas transfer line or flow passage) cause compression or expansion of the working gas in the working volume. | 11-20-2008 |
20080282708 | Cryocooler split flexure suspension system and method - A cryocooler in which two independently moving flexure systems are split across a single magnetic structure, decreasing package size and increasing resistance to cantilevered mass sag due to external forces. A series of concentrically oriented flexure coupling shafts are provided that allow two independently moving flexure assemblies to be split across a single motor. A series of connectors are included on the forward side of the motor that pass through the outer shaft and allow the inner connecting shaft to be mounted to its flexures without interference. A series of close-out connections are included on the aft flexure stacks that makes assembly possible, providing firm mechanical connections without interference. | 11-20-2008 |
20080295523 | Machined Spring With Integral Retainer For Closed Cycle Cryogenic Coolers - A retainer and spring with threaded end are machined from a single piece of material for threading to a piston in a closed cycle cryogenic cooler. Since the machined retainer and spring are a unitary part, they cannot rub against each other during operation of the piston which reduces debris generation. The spring is preferably formed as a double start helix which further increases axial stability and reduces side loading. The spring extends into an integrally formed, threaded end at the end thereof opposite the retainer. The spring is therefore solidly connected to its adjoining parts which greatly reduces tilting and off-axis movements inherent in the prior art, wound spring designs. | 12-04-2008 |
20080295524 | Pulse tube refrigerating machine - A pulse tube refrigerating machine enables maintenance of an orifice while circulation of refrigerant gas within individual components is allowed, thus reducing the time required for maintenance. A compressor delivers a refrigerant gas having a high pressure and sucks the refrigerant gas having a low pressure. A cold head including a regenerator tube through which the refrigerant gas circulates and a pulse tube is connected to a housing. The flow of the refrigerant gas is controlled by one or more orifices, which are disposed outside the housing. The compressor, the housing, and the orifices are coupled via tubing. A coupling unit is disposed at both ends of at least one of the orifices. The coupling unit has a structure such that it can be split while the refrigerant gas is retained within the tubing. When the coupling unit is split, a detachable unit portion including the orifice is isolated. | 12-04-2008 |
20080295525 | MULTIPLE ROTARY VALVE FOR PULSE TUBE REFRIGERATOR - A rotary disc valve unit and refrigerators containing a rotary disc valve unit that has multiple valves, in which at least one rotary valve has ports connecting to the regenerator and at least one rotary valve has ports connecting to the warm ends of one or more pulse tubes where the rotary valve with ports for the regenerator has lighter contact than the rotary valve with ports for the pulse tubes. The valve face is divided into an inner area with ports for the pulse tubes and an outer area with ports for the regenerator, the inner area having a greater sealing pressure than the outer area. | 12-04-2008 |
20080307797 | Positive Displacement Expander and Fluid Machinery - When an expansion mechanism ( | 12-18-2008 |
20080314050 | NO-VENT LIQUID HYDROGEN STORAGE AND DELIVERY SYSTEM - A hydrogen storage and delivery system is provided having an orifice pulse tube refrigerator and a liquid hydrogen storage vessel. A cooling system, coupled to the orifice pulse tube refrigerator, cools the vessel and abates ambient heat transfer thereto in order to maintain the liquid hydrogen in the vessel at or below its saturation temperature. Hydrogen boil-off, and the necessity to provide continuous venting of vaporized hydrogen are minimized or avoided. In a preferred embodiment, the hydrogen storage vessel has a toroidal shape, and the pulse tube refrigerator is a two stage pulse tube refrigerator and extends within a central void space defined at the geometric center of the toroidal storage vessel. Also in a preferred embodiment, the cooling system includes first and second thermal jackets, each having a substantially toroidal shape and enclosing the storage vessel, wherein each of the thermal jackets is thermally coupled to one of the first or second stages of the pulse tube refrigerator in order to cool the vessel and to abate ambient heat leak thereto. The hydrogen storage and delivery system is particularly suitable for use in vehicles, such as passenger automobiles. | 12-25-2008 |
20090000312 | METHOD AND APPARATUS FOR COOLING A CONTAINER - A method and apparatus for the rapid cooling of a container and its contents, such as a beverage container. A heat transfer fluid is thermally contacted with the beverage container, where the heat transfer fluid has a temperature of less than 0° C. The heat transfer fluid can be physically separated from the container, such as by flowing the heat transfer fluid through a heat exchanger that surrounds the container. The cooling parameters can be controlled such that the container and its contents are rapidly cooled without freezing of the contents. | 01-01-2009 |
20090000313 | Regenerator matrix with mixed screen configuration - A regenerator matrix | 01-01-2009 |
20090000314 | Apparatus and method for rapidly freezing small objects - A compact desktop gas liquefaction system having a gas generator, a cooling unit having a Stirling, pulse-tube or Stirling-pulse-tube cooler, and an insulated container to receive the liquefied gas. The system may be used to produce liquid nitrogen, oxygen, argon, natural gas, or air. The insulated container can be quickly disengaged from the gas liquefaction system, thereby minimizing the risk associated with handling liquefied gases. This compact liquefier allows for on-demand and on-site cryogen generation. The system provides a condenser surrounded by an evacuated space for greater efficiency of operation in a limited space. | 01-01-2009 |
20090025399 | Water Vapor Distillation Apparatus, Method and System - A fluid vapor distillation apparatus. The apparatus includes a source fluid input, and an evaporator condenser apparatus. The evaporator condenser apparatus includes a substantially cylindrical housing and a plurality of tubes in the housing. The source fluid input is fluidly connected to the evaporator condenser and the evaporator condenser transforms source fluid into steam and transforms compressed steam into product fluid. Also included in the fluid vapor distillation apparatus is a heat exchanger fluidly connected to the source fluid input and a product fluid output. The heat exchanger includes an outer tube and at least one inner tube. Also included in the fluid vapor distillation apparatus is a regenerative blower fluidly connected to the evaporator condenser. The regenerative blower compresses steam, and the compressed steam flows to the evaporative condenser where compressed steam is transformed into product fluid. | 01-29-2009 |
20090094992 | GAS LIQUIFIER - A cryocooler for liquefying gas in which the neck of the dewar or cryostat includes a cold end of a cryocooler with the first stage cooling station, the first stage regenerator, the second stage cooling station, the second stage regenerator, and a condenser thermally coupled to the second cooling station. Radiation baffles are also present within the neck portion of the dewar between the storage portion for the dewar and the condenser, such that when the cryocooler is turned off, the radiation baffles reduce heat radiation on the cryogen in the storage section of the dewar. | 04-16-2009 |
20090107150 | Inertance tube and surge volume for pulse tube refrigerator - An inertance tube and a surge volume for a pulse tube refrigerator system may be integrally coupled together, such as by the inertance tube being at least in part a channel in a wall of the surge volume. The surge volume may have a helical channel in an outer wall that forms part of the inertance tube. The surge volume tank may be surrounded by a cover that closes off the channel to form the inertance tube as an integral part of the surge volume. The inertance tube may have a non-circular cross section shape, such as a square shape or non-square rectangular shape. The channel may be tapered, perhaps changing aspect ratio. Alternatively, the inertance tube may be a separate tube having a non-circular shape, which may be wrapped around at least part of the surge volume. | 04-30-2009 |
20090126371 | Heat Pump - A heat pump device in which a temperature difference is established between two heat exchangers by inducing cyclical expansion and compression pulses in a working fluid vapour or gas which passes through an adsorbent porous solid located between the heat exchangers. | 05-21-2009 |
20090158752 | VARIABLE POWER CRYOGENIC REFRIGERATOR - A compressor ( | 06-25-2009 |
20090173083 | CO-AXIAL MULTI-STAGE PULSE TUBE FOR HELIUM RECONDENSATION - A two-stage pulse tube refrigerator having a compact design, low vibration and low heat loss is provided where at least the 2 | 07-09-2009 |
20090241556 | Pulse Tube Refrigerator and Regenerative Refrigerator - A pulse tube refrigerator, includes a first pulse tube; a first regenerator connected to the first pulse tube; a compressor configured to compress the coolant gas; a first supply side valve; a first filter provided between a supply side of the first supply side valve and the high temperature end of the first regenerator; a first suction side valve connected to the first filter via a first joint point; a first self seal joint provided between the supply side of the compressor and a suction side of the first supply side valve; a second self seal joint provided between a supply side of the first suction side valve and the suction side of the compressor; and a third self seal joint provided between a first regenerator side of the first filter and the high temperature end of the first regenerator. | 10-01-2009 |
20090249797 | Thermoacoustic Refrigerators and Engines Comprising Cascading Stirling Thermodynamic Units - The present invention includes a thermoacoustic assembly and method for improved efficiency. The assembly has a first stage Stirling thermal unit comprising a main ambient heat exchanger, a regenerator and at least one additional heat exchanger. The first stage Stirling thermal unit is serially coupled to a first end of a quarter wavelength long coupling tube. A second stage Stirling thermal unit comprising a main ambient heat exchanger, a regenerator, and at least one additional heat exchanger, is serially coupled to a second end of the quarter wavelength long coupling tube. | 10-08-2009 |
20090255273 | Method and device for condensing CO2 - The invention relates to a method and to a device for condensing CO2 or CO2 separation. According to the invention the thermoacoustic effect is used, with the aid of waste heat from a power station, to produce power for a compressor for compressing a working medium, in particular for compressing a CO2-containing flue gas, and/or for cooling the working medium. | 10-15-2009 |
20090282838 | METHOD, APPARATUS, AND SYSTEM FOR COOLING AN OBJECT - A method for cooling an object includes coupling a cooling device to the object, wherein the cooling device includes at least one thermoacoustic engine and a plurality of gas diodes, generating acoustic power with the thermoacoustic engine, channeling acoustic oscillations of a fluid through the gas diodes, and transferring the heat produced by the object to the fluid to facilitate moving the heat away from the object. | 11-19-2009 |
20100000232 | CRYOGENIC LIQUID STORAGE SYSTEM FOR A SPACECRAFT - A cryogenic liquid storage system for a spacecraft comprising at least one liquid tank with an outer casing and an evacuated space arranged between the tank and the outer casing. The system further comprises a propellant management device made of material that is a good conductor of heat and that is cooled by a cryorefrigerator to localize the liquid inside the tank when in microgravity, a filler pipe situated in the portion of the tank that is at the bottom when the tank is on the ground, and that is surrounded by an evacuated insulating double wall and a purge pipe connecting the tank to the outer casing and presenting an internal length that is not less than half the diameter of the tank. | 01-07-2010 |
20100018224 | STIRLING COOLER - A Stirling cooler includes a Stirling refrigerator having a heat dissipation unit and a heat absorption unit, a cooling compartment cooled by cold heat of the heat absorption unit, a secondary refrigerant circulation circuit cooling the heat dissipation unit, and a tertiary refrigerant circulation circuit exchanging heat with the secondary refrigerant circulation circuit. | 01-28-2010 |
20100037627 | CAPTURE AND REMOVAL OF GASES FROM OTHER GASES IN A GAS STREAM - A method for the selective capture and removal of gases and vapors from a gas stream using a thermo-acoustic device includes the steps of first cooling the gas stream using at least one heat exchanger and then passing the stream to a thermo-acoustic refrigeration process and removing gases in a cascade process. The gases that are captured and removed, such as CO | 02-18-2010 |
20100064696 | ACTIVE CONTROL OF AN ACOUSTIC COOLING SYSTEM - An acoustic cooling system comprising a first transducer ( | 03-18-2010 |
20100064697 | Heat Pump Comprising a Cooling Mode - A heat pump having a cooling mode includes a cooling evaporator coupled to an advance flow and a backflow. The cooling evaporator is brought to a pressure such that a vaporization temperature of the working liquid in the backflow is below a temperature of an object to be cooled to which the backflow may be thermally coupled. In this manner, an area having vapor at high pressure is generated. This vapor is fed into a dynamic-type compressor which outputs the vapor at a low pressure and provides electrical energy in the process. The vapor at low pressure is fed to a cooling liquefier which provides vapor liquefaction at a low temperature, this temperature being lower than the temperature of the object to be cooled. The working liquid removed from the cooling evaporator due to the vaporization is refilled by a filling pump. The heat pump having a cooling mode also results when a specific heat pump is operated in the reverse direction, and provides cooling without any net use of electrical energy. Instead, the cooling even generates electrical energy. | 03-18-2010 |
20100089069 | Low temperature device - A low temperature device has a low temperature container with an investigational opening. A material sample to that is to be examiner is mounted on a sample-holding device in the low temperature container. A sample that is fastened to the sample holding device can be cooled to the desired temperature using a cooling device, such as a pulse tube cooler, with a cold head that is inside the low temperature container. The sample holder is disposed in the low temperature container in such a way that the sample can be seen through the investigational opening. Because the investigational opening is flexible and not rigidly connected to the low temperature container, vibrations produced by the mechanical cooling device are prevented from being transferred to the investigational opening. Thus, a vibration-sensitive investigating and manipulating device can be coupled to the investigational opening without vibrations being transferred to the investigating and manipulating device. | 04-15-2010 |
20100132381 | LOW WEAR PISTON SLEEVE - Provided is a low friction, self-lubricating sleeve for use with a reciprocating piston in the compressor and/or the expander subsystem of a cryogenic cooler or other compressor type system. The sleeve is bonded to an outer surface of the piston, thereby positioning the sleeve between the piston and an inner wall of a piston cylinder. The sleeve is manufactured using a polyetheretherketone base material, as well as varying percentages of carbon and/or polytetrafluoroethylene fillers. The sleeve may include a dry lubricant such as graphite or molybdenum disulfide, and may extend for all or part of the length of the piston. The sleeve demonstrates negligible wear over thousands of hours of use in the cryogenic cooler, thereby minimizing system gas blow-back and maximizing system efficiency/performance. | 06-03-2010 |
20100186425 | CLOSED CYCLE STIRLING CRYOGENIC COOLER WITH COLD PLASMA PRESSURE WAVE GENERATOR - A closed cycle Stirling cryogenic cooler, typically utilizing a noble gas (He or like) as a working fluid and containing a pneumatically driven expander interconnected with a low frequency pressure wave generator using a flexible transfer line or conduit, wherein the pressure wave generator includes a sealed gas discharge cavity containing the pressurised working fluid and a plurality of discharge electrodes which are electrically isolated, protrude through the walls of the cavity and are electrically connected to the high frequency pulse voltage supply, thus producing the glow discharge resulting in a cloud of cold plasma, making a so-called “plasmanized gas piston”. | 07-29-2010 |
20100218513 | THERMALLY ACTIVATED HIGH EFFICIENCY HEAT PUMP - A vapor compression cycle system is combined with a Rankine cycle system, with the two systems having a common suction accumulator from which the compressor draws refrigerant vapor for the vapor compression cycle system and from which a pump draws liquid refrigerant for circulation within the Rankine cycle system. The vapor from the Rankine cycle system expander is passed to the compressor discharge to provide a mixture which is circulated within the vapor compression cycle system to obtain improved performance. The heat exchangers are sized so as to obtain a non-complete evaporation, with the resulting two-phase fluid passing to the suction accumulator to provide liquid refrigerant to the Rankine cycle system and vapor refrigerant to the vapor compression cycle system. | 09-02-2010 |
20100223934 | Thermoacoustic Refrigerator For Cryogenic Freezing - A refrigeration system includes a cooler or freezer enclosure; a heat exchanger within the enclosure; a bulk storage tank in fluid communication with the heat exchanger; a sound generator in fluid communication with the heat exchanger; a thermoacoustic refrigerator in acoustic communication with the sound generator; and an indirect heat exchange loop in heat transfer contact with the thermoacoustic refrigerator. The heat exchanger is adapted to receive pressurized fluid from the bulk storage tank, and to provide pressurized gas to the sound generator. | 09-09-2010 |
20100229572 | REGENERATIVE REFRIGERATOR - A regenerative refrigerator includes a cylinder; a displacer provided in the cylinder; a groove pattern formed on the exterior circumferential surface of the displacer or the interior circumferential surface of the cylinder to form a first gas passage connecting one end and the other end of the exterior or interior circumferential surface, and including a groove having at least part thereof extending along a direction to cross the axial directions of the displacer to cause gas flowing from the one end to the other end in the gap between the exterior and interior circumferential surfaces to actively exchange heat with the cylinder and the displacer; a second gas passage to and from an expansion space; and a regenerator material formed of bismuth granules and provided in at least part of the second gas passage, wherein the lowest attainable temperature is 5 K to 15 K in an unloaded state. | 09-16-2010 |
20100257872 | Pulse tube refrigerator - A multistage pulse tube refrigerator includes a first stage regenerator tube including a heat exchanger; a second stage regenerator tube; a first stage pulse tube; a second stage pulse tube; a first cooling stage connected to the first stage regenerator tube and the first stage pulse tube; and a second cooling stage connected to the second stage regenerator tube and the second stage pulse tube. A cold end of the first stage regenerator tube is connected to the first stage pulse tube via a first flow path and connected to the second stage regenerator tube via a second flow path. The first flow path is configured such that a heat exchange occurs between the heat exchanger and a refrigerant gas flowing through the first flow path, and the second flow path is configured such that the refrigerant gas flowing through the second flow path bypasses the heat exchanger. | 10-14-2010 |
20100275616 | CRYOGENIC REFRIGERATOR AND CONTROL METHOD THEREFOR - A cryogenic refrigerator ( | 11-04-2010 |
20100293967 | COMPRESSOR SYSTEM AND METHOD FOR GAS LIQUEFACTION SYSTEM - A system and method according to which a compressor having a first shaft is provided, and an aeroderivative gas turbine for driving the compressor is provided, the aeroderivative gas turbine including a gas generator and a power turbine coupled to the gas generator, the power turbine having a second shaft directly coupled to the first shaft of the compressor for directly driving the first shaft. | 11-25-2010 |
20100307169 | TRIGENERATION SYSTEM AND METHOD - A trigeneration system comprising a cooling loop and a heat/power loop connected by a heat exchanger. Energy available at the high side of the cooling loop is transferred from cooling loop to the heat/power loop by the heat exchanger. This energy is put to use by the heat/power loop to efficient produce heat and power. The system can be run transcritical and use environmentally friendly working fluid, such as carbon dioxide. | 12-09-2010 |
20100313577 | HIGH EFFICIENCY COMPACT LINEAR CRYOCOOLER - A method of removing heat due to compression of a working gas from a linear cryocooler is disclosed. The cryocooler includes a sealed housing, a displacer including a displacer piston and a displacer cylinder, and a compressor all arranged within the housing. The compressor includes a compressor piston that is movable within a compression chamber. The method includes providing a port in the compression chamber to remove heat from the compression chamber due to the compression of the working gas to the housing prior to entering the displacer piston. | 12-16-2010 |
20110000225 | DOUBLE INLET TYPE PULSE TUBE REFRIGERATOR - A double inlet type pulse tube refrigerator includes a regenerator having a high temperature end and a low temperature end; a pulse tube having a high temperature end and a low temperature end connected to the low temperature end of the regenerator; a compressor having a high pressure supplying side and low pressure receiving side for a coolant, a bypass pipe having a double inlet valve, the bypass pipe being configured to connect the high temperature end of the pulse tube and the high temperature end of the regenerator; a buffer tank connected to the high temperature end of the pulse tube via a first pipe having a first flow path resistance member; and a second pipe having a second flow path resistance member including a third opening and closing valve. | 01-06-2011 |
20110000226 | 4-VALVE PULSE TUBE CRYOCOOLER - A 4-valve pulse tube cryocooler has, on a high-pressure end of a compressor, first and second coolant supply channels respectively connected to high-temperature ends of a regenerator and a pulse tube. The cryocooler further has, on a low-pressure end of the compressor, a first coolant recovery channel connected to the high-temperature end of the regenerator, a second coolant recovery channel connected to the high-temperature end of the pulse tube, and a third coolant recovery channel connected to the high-temperature end of the pulse tube via a common pipe and including a flow resistance member interposed between a flow control valve and the high-temperature end of the pulse tube. | 01-06-2011 |
20110000227 | COMPRESSOR - To improve the exhaust heat recovery efficiency, a compressor includes a heat exchanger for cooling a gas, coolant, water, or oil heated by the compressor during compressor operation by heat exchange with a working fluid, for circulating the working fluid of a Rankine cycle. The Rankine cycle is implemented by the heat exchanger, an expander, a condenser, and a circulating pump to circulate the working fluid through the cycle. | 01-06-2011 |
20110000228 | HYBRID CRYOCOOLER WITH MULTIPLE PASSIVE STAGES - A multi-stage cryocooler has three or more stages, including an active first stage and passive second and third stages. The active stage may include a Stirling expander, and the passive second and third stages may be pulse tube coolers. The cryocooler may provide cooling at three different temperatures. The coldest cooling temperature may be at or below 10 K, and may be at or below 5 K. The system may provide cooling at such low temperatures while still operating at a relatively high frequency, for example, at a frequency of at least about 20 Hertz. | 01-06-2011 |
20110005237 | OIL REMOVAL FROM A TURBINE OF AN ORGANIC RANKINE CYCLE (ORC) SYSTEM - A method and system for removing oil in an organic rankine cycle (ORC) system ( | 01-13-2011 |
20110011101 | TURBINE GENERATOR AND REFRIGERATING APPARATUS PROVIDED WITH TURBINE GENERATOR - A turbine generator is formed with a gas-refrigerant storage space over a power generation mechanism inside of a casing and a liquid-refrigerant storage space under the power generation mechanism. The turbine generator is provided with a gas-refrigerant outlet pipe penetrating the casing and leading to the gas-refrigerant storage space and a liquid-refrigerant outlet pipe penetrating the casing and leading to the liquid-refrigerant storage space. | 01-20-2011 |
20110061404 | REGENERATIVE REFRIGERATOR - A regenerative refrigerator includes a compressor compressing working fluid; a cylinder fed with the compressed working fluid, containing a regenerator material, and having an expansion space; and a rotary valve to switch a first passage and a second passage formed to cause the working fluid to flow from the compressor to the expansion space and from the expansion space to the compressor, respectively. The working fluid expands in the expansion space to generate cold temperatures in the cylinder. The rotary valve includes a valve body having a first flat surface; and a valve plate having a second flat surface and configured to rotate with the first and second flat surfaces in surface contact. One of the first and second flat surfaces has an arithmetic average roughness of 0.1 μm to 0.9 μm. The other one of the first and second flat surfaces includes resin. | 03-17-2011 |
20110094244 | ROTARY VALVE AND A PULSE TUBE REFRIGERATOR USING A ROTARY VALVE - A rotary valve of a multivalve type pulse tube refrigerator includes: a stationary seat; a rotary disk to change a coolant path by rotating while surface-contacting with a face of the stationary seat; a plurality of first ports provided in the face of the stationary seat to supply a high-pressure coolant to a regenerator and exhaust a low-pressure coolant from the regenerator; and a plurality of second ports provided in the face of the stationary seat to supply a high-pressure coolant to a pulse tube and exhaust a low-pressure coolant from the pulse tube. The first ports are arranged in a first circular track area in rotation symmetry with respect to the center of the face. The second ports are arranged in a second circular track area in rotation symmetry with respect to the center of the face. | 04-28-2011 |
20110100022 | PHASE SHIFT DEVICES FOR PULSE TUBE COOLERS - Various embodiments are directed to pulse tube coolers and components thereof. A pulse tube cooler may comprise a compressor, a regenerator, a pulse tube and a reservoir. A network of phase control devices may be placed in a fluid path between a hot end of the pulse tube and the reservoir. The network of phase control devices may have at least one flow resistance device and at least one inertance device. | 05-05-2011 |
20110100023 | VARIABLE PHASE SHIFT DEVICES FOR PULSE TUBE COOLERS - Various embodiments are directed to pulse tube coolers having flow resistance devices that are variable within the thermodynamic cycle of the pulse tube. An example pulse tube may comprise a compressor, a regenerator, a reservoir and a pulse tube. A working fluid may be positioned within the regenerator, pulse tube and reservoir. Further, a variable phase control device may be positioned in a fluid path between the pulse tube and the reservoir. The pulse tube cooler may also comprise a control circuit. The control circuit may be programmed to vary a characteristic of the variable phase control device based on the position of the pulse tube cooler in its thermodynamic cycle. | 05-05-2011 |
20110100024 | MULTISTAGE PULSE TUBE COOLERS - Various embodiments are directed to multistage pulse tube coolers. In some embodiments, one or more stages of the pulse tube cooler may comprise a control valve positioned between the hot end of the pulse tube and the reservoir. Also, in various embodiments, one or more inter-stage control valves may be positioned between the pulse tubes of consecutive stages. | 05-05-2011 |
20110100025 | FLUID MACHINE AND REFRIGERATION CYCLE APPARATUS - A fluid machine | 05-05-2011 |
20110126553 | Cryogenic Pump Employing Tin-Antimony Alloys and Methods of Use - A cryogenic refrigerator includes a regenerative heat exchanger material in thermal contact with a working gas including a tin-antimony (Sn—Sb) alloy or a tin-gallium (Sn—Ga) alloy in at least one cooling stage. The re-generative heat exchanger material can include an Sn—Sb-M alloy, with M including at least one element selected from the group consisting of Bi, Ag, Ge, Cu, La, Mg, Mn, Nd, Ni, Pd, Pt, K, Rh, Sm, Se, S, Y, Fe, In, Al, Ce, Dy, Cd, Ti, Au, P, Pr, Yb and Zn. The cryogenic refrigerator can include a Gifford-McMahon refrigerator, a pulse tube refrigerator, or a Stirling refrigerator. A cryopump includes cryopanels adapted to condense or adsorb gases and a cryogenic refrigerator. | 06-02-2011 |
20110126554 | Linear Drive Cryogenic Refrigerator - A cryogenic refrigerator has a refrigeration cylinder and at least two displacers. Each displacer reciprocates in the refrigeration cylinder and moves refrigeration gas through the refrigeration cylinder. A regenerator cools the refrigeration gas, and gas control valves admit high pressure gas into the refrigeration cylinder and exhaust gas from the refrigeration cylinder. The refrigerator also has linear motors operatively connected to displacers, and the linear motors drive the displacers in reciprocating movement. A position sensor is provided to determine a parameter of the displacers during reciprocation. A controller is operatively connected to the linear motors to control the linear motors. The controller controls a parameter of the two displacers during reciprocation. The parameter can be stroke length, stroke speed, stroke phase or another parameter of the displacer for temperature control of the cryogenic refrigerator. The cryogenic refrigerator may also include a device to remove vibration. | 06-02-2011 |
20110146302 | CRYOGENIC HEAT EXCHANGER FOR THERMOACOUSTIC REFRIGERATION SYSTEM - A heat exchanger and related method for a thermoacoustic refrigeration system are provided, which includes a warm end of the heat exchanger, a cryogen passing through the warm end to remove heat generated by a thermoacoustic wave generator, and a cool end through which a cooling medium passes to be cooled by the heat transfer at the warm end, wherein cryogenic gas is exhausted from the warm end, and a cooling gas is exhausted from the cool end at a lower temperature than a temperature of the warm end. | 06-23-2011 |
20110173995 | PULSE TUBE REFRIGERATOR - A pulse tube refrigerator, includes a pulse tube; and a regenerator having a low temperature end, the low temperature end being in communication with a low temperature end of the pulse tube via a communicating path, wherein a heat exchanger is provided at the low temperature end side of the pulse tube in the communicating path; the heat exchanger includes a laminated body, the laminated body including at least first and second metal gauzes; the first and second metal gauzes include copper or a copper alloy; interfaces of the metal gauzes are diffusion-bonded to each other; and a side surface of the laminated body is diffusion-bonded to an internal wall forming the communicating path. | 07-21-2011 |
20110185747 | PULSE TUBE REFRIGERATOR - A pulse tube refrigerator includes a regenerator tube; a pulse tube; and a condenser condensing an atmospheric gas and disposed at cold ends of the regenerator tube and the pulse tube so as to also function as a cooling stage. The condenser includes a first surface and a second surface facing each other, a flow path having two openings on the first surface and connecting the cold end of the regenerator tube and the cold end of the pulse tube, and multiple holes extending from the second surface. The holes formed in an area of the condenser defined by a circle having the center on a straight line connecting the centers of the openings of the flow path do not pass through the condenser up to the first surface. The circle is the smallest circle enclosing the openings or a circumscribed circle circumscribing the openings. | 08-04-2011 |
20110265493 | Thermoacoustic Apparatus With Series-Connected Stages - A thermoacoustic apparatus includes multiple thermoacoustic device stages, such as individual thermoacoustic refrigerators, connected in a looped series such that excess acoustic energy from a first stage forms a part of the input energy to the next successive stage. Each stage includes an acoustic source, a regenerator, and a plurality of heat exchangers. The stages are interconnected by transmission lines. The dimensions of the transmission lines, materials used, and the operating parameters are selected so that that excess acoustic power is communicated to a succeeding stage with a pressure phase at the back of an acoustic source of the succeeding stage such that the electric power required by the acoustic source of the succeeding stage is minimized for a given acoustic power produced by the second stage. Improved operating efficiency of the thermoacoustic apparatus is thereby provided. | 11-03-2011 |
20110283716 | REFRIGERATION SYSTEM AND PROCESS UTILIZING A HEAT PIPE HEAT EXCHANGER - A refrigeration system includes a cryogenic freezer and a mechanical refrigerator, wherein the mechanical refrigerator includes an enclosure containing an atmosphere, the cryogenic freezer includes a cryogen exhaust conduit, and a heat pipe heat exchanger including a warm end and a cold end, wherein the heat pipe heat exchanger is in heat transfer relationship with the mechanical refrigerator and the cryogenic freezer such that the warm end of the heat pipe heat exchanger contacts the atmosphere within the mechanical refrigerator enclosure, and the cold end of the heat pipe heat exchanger is disposed within the cryogen exhaust conduit of the cryogenic freezer. A refrigeration process includes cooling an atmosphere within a mechanical refrigerator by exposing the atmosphere to a warm end of a heat pipe heat exchanger, wherein a cold end of the heat pipe heat exchanger is disposed within an exhaust duct of a cryogenic freezer. | 11-24-2011 |
20110296849 | Integrated power, cooling, and heating apparatus utilizing waste heat recovery - The present invention provides an apparatus for utilizing waste heat to power a reconfigurable thermodynamic cycle that can be used to selectively cool or heat an environmentally controlled space, such as a room, building, or vehicle. The present invention also integrates an electric machine, which may operate as a motor or generator, or both, and an additional prime mover, such as an internal combustion engine. Different combinations of these components are preferable for different applications. The system provides a design which reasonably balances the need to maximize efficiency, while also keeping the design cost-effective. | 12-08-2011 |
20120000208 | LONG LIFE SEAL AND ALIGNMENT SYSTEM FOR SMALL CRYOCOOLERS - In one embodiment, a compressor includes a moving assembly configured to compress a gas within a compression volume; a guide rod connected to the moving assembly which reciprocates axially with the moving assembly; and a bellows seal positioned between the moving assembly and a stationary housing which at least partially defining the compression volume. In another embodiment, a compressor includes a motor assembly configured to compress a gas within a compression volume, the motor assembly including: a stationary coil assembly; a moving assembly having at least one magnet, and a gap located between the stationary coil assembly and the moving assembly; wherein the moving assembly is configured to reciprocate axially with respect to the stationary coil assembly when electrical current is applied to the stationary coil assembly, and to change the width of the gap between the stationary coil assembly and the moving assembly so as to provide magnetic axial stiffness against motion of the moving assembly. One or more embodiments may be used in a cryocooler assembly. | 01-05-2012 |
20120011858 | DISPLACER VALVE FOR CRYOGENIC REFRIGERATOR - The present invention discloses a displacer valve for a cryogenic refrigerator, which is mounted on one circular surface of a displacer cover by a bolt to open and close a hole formed in the surface of the displacer cover. The displacer valve includes a rotation preventing guide fastened to an eccentric portion of the displacer cover by the bolt to prevent the displacer valve from rotating around the bolt. Therefore, the displacer valve does not rotate around the bolt but is fixed in a proper position, so that its operational reliability can be ensured. | 01-19-2012 |
20120017607 | Expander for Stirling Engines and Cryogenic Coolers - The invention is directed to an improved cryogenic cooler with an expander where the regenerator matrix is decoupled from the displacer or piston, thereby allowing the design of each to be optimized substantially independently. The regenerator matrix is preferably positioned spaced apart from the displacer and can be designed to enhance thermal exchanges and flow rates of the working gas. In one embodiment, the regenerator matrix has a serpentine shape or U-shape disposed around the displacer and the cold finger. Preferably, the regenerator matrix is static. The thermal lengths of the cold finger and/or the displacer can be extended by minimizing their geometrical lengths. Additionally, the structural integrity or stiffness of the cold finger and/or displacer can be strengthened. | 01-26-2012 |
20120073310 | CRYOGENIC VACUUM BREAK THERMAL COUPLER - A novel thermal coupler apparatus and method to couple a cryocooler or another cooling device to a superconducting magnet or cooled object allows for replacement without a need to break the cryostat vacuum or to warm up the superconducting magnet or other cooled object. A method uses a pneumatic actuator for coupling, and a retractable mechanical actuator for uncoupling. Mechanical closing forces are balanced between the intermediate temperature and low temperature cooling surfaces and do not transfer to the cooled object. The pneumatic actuator provides permanent control under mechanical closing forces in the thermal coupling. | 03-29-2012 |
20120079838 | Ruggedized Integrated Detector Cooler Assembly - The present invention relates to a cryogenic cooler's expander supported by a support member, preferably a truncated conical tube. The support member provides additional stiffness to the expander to reduce movements at the distal end of the expander. The support member also increases the natural frequency of the expander. In one embodiment, the support member increases the natural frequency of the expander at least about two (2) times in the bending and/or twisting sense. In another embodiment, the bending natural frequency of the expander and support sub-assembly is at least about two times greater or lower than the natural frequency of the electrical wires that connect the infrared sensor to a control processing unit to reduce the maximum stress applied to the electrical wires during use. In another embodiment, additional or redundant electrical pathways are provided for the connection between the infrared sensor and the CPU. Furthermore, shock absorber and/or shock diverters are provided on the rigid pins that connect the electrical wires to the CPU. | 04-05-2012 |
20120102975 | CRYOGEN FREE COOLING APPARATUS AND METHOD - A cryogen free cooling apparatus comprises at least one heat radiation shield ( | 05-03-2012 |
20120102976 | PULSE TUBE CRYOCOOLER MODULATING PHASE VIA INERTANCE TUBE AND ACOUSTIC POWER AMPLIFIER THEREOF - A pulse tube cryocooler modulating phase via an inertance tube and an acoustic amplifier (A | 05-03-2012 |
20120117984 | VALVE ASSEMBLY ADAPTED FOR DYNAMIC CONTROL OF GAS-FLOW ABOUT A CRYOGENIC REGION - A valve assembly is provided for dynamically controlling the inlet and exhaust of refrigeration gas between a cryocooler coldhead and a remote compressor. The valve assembly is optimized to minimize friction, power consumption, and wear while providing complete flexibility as to the timing, duration, and amplitude of its inlet and exhaust actions. The valve assembly comprises two separate open-close sections for the inlet and exhaust functions. These are mounted along a single rod, the position of which is controlled by a linear motor. The two sections are configured so that only one is open at each the rod's travel and neither is open at the midpoint of travel. A microprocessor and appropriate drive circuits precisely control the position of the rod as a function of time, and of displacer position when used with a Gifford-McMahon (G-M) cooler. | 05-17-2012 |
20120131932 | HEAT TRANSFER SYSTEM - A thermodynamic system includes a cyclical heat exchange system and a heat transfer system coupled to the cyclical heat exchange system to cool a portion of the cyclical heat exchange system. The heat transfer system includes an evaporator including a wall configured to be coupled to a portion of the cyclical heat exchange system and a primary wick coupled to the wall and a condenser coupled to the evaporator to form a closed loop that houses a working fluid. | 05-31-2012 |
20120137707 | ZERO DELTA TEMPERATURE THERMAL LINK - An apparatus for transferring cryogenic refrigeration includes a cryocooler interface, a housing, a working fluid, a heat exchanger, a flexible thermal link, and a remote cartridge cold head. The cryocooler interface is thermally connected to a cryocooler providing a source of refrigeration. The refrigeration is passed from the crycooler into the heat exchanger via the cryocooler interface. The remote cartridge cold head is attached to a remote location. Heat is drawn from the remote location through the remote cartridge cold head and into the heat exchanger via the working fluid within the flexible thermal link and housing. Within the heat exchanger, heat is transferred from the working fluid to the refrigeration source, such as a cryocooler; accordingly, the remote location is cooled. | 06-07-2012 |
20120151941 | SECONDARY PULSE TUBES AND REGENERATORS FOR COUPLING TO ROOM TEMPERATURE PHASE SHIFTERS IN MULTISTAGE PULSE TUBE CRYOCOOLERS - Pulse tube refrigeration or cooling systems are described which utilize a secondary regenerator or a secondary pulse tube. Use of such a secondary regenerator or pulse tube enables a commercially available pressure oscillator to be incorporated in the cooling system. The commercially available oscillator can be operated at room temperature or approximately so. | 06-21-2012 |
20120167598 | VACUUM ISOLATED MULTI-WELL ZERO LOSS HELIUM DEWAR - A multi-well helium Dewar is provided for recirculating coolant about a cryostat probe; the Dewar includes a first well containing a first coolant reservoir, and a second well containing a second coolant reservoir. A fluid connection extends between the first and second coolant reservoirs. A low impedance conduit further connects a top end of the second well to the first well. In this regard, the Dewar at least partially contains a cryocooler within the first well and a cryostat probe within the second well. Vibrational noise is reduced by the incorporation of soft mounting components for connecting various features. A thermal shield of the Dewar can be thermally connected to isolated components for additional cooling power and increased efficiency during initialization. A second fluid connection may include a valve attached to a counter-flow heat exchanger for efficiently re-condensing excess gas within the Dewar. | 07-05-2012 |
20120204579 | REGENERATIVE REFRIGERATOR - A regenerative refrigerator includes a cylinder configured to cause a refrigerant gas to adiabatically expand; and a regenerator tube connected to the cylinder and including a partitioning member. The partitioning member partitions an internal space of the regenerator tube into a first space in which the refrigerant gas flows and a second space filled with a regenerator material formed of gas. The regenerator tube is configured to accumulate, in the regenerator material, cold generated in the cylinder with adiabatic expansion of the refrigerant gas. The area of exposure of the partitioning member to the second space is greater than the area of exposure of the partitioning member to the first space. | 08-16-2012 |
20120227416 | Pressure Wave Generator - A pressure wave generator ( | 09-13-2012 |
20120227417 | G-M REFRIGERATOR WITH PHASE MODULATION MECHANISM - A G-M refrigerator comprises a compressor ( | 09-13-2012 |
20120234023 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator according to an embodiment of the present invention is used in cooling a superconducting magnet. The cryogenic refrigerator includes a crankpin bearing of a scotch yoke. The crankpin bearing is made of a cylindrical nonmagnetic resin material. The crankpin bearing includes a cylindrical inner wall and a cylindrical outer wall. The cylindrical inner wall supports a crankpin. The crankpin is eccentrically attached to an output shaft of a motor slidably in a circumferential direction. The cylindrical outer wall contacts with an inner wall of a window portion of the scotch yoke. The cylindrical inner wall is made of another nonmagnetic resin material different from the nonmagnetic resin material of the cylindrical outer wall. Hardness of the cylindrical inner wall is higher than hardness of the cylindrical outer wall. | 09-20-2012 |
20120255312 | Method and System to Produce Electric Power - An open brayton cycle power generation system is enabled and improved by integration of an energy storage system utilizing cryogenic storage of atmospheric gas. A particular improved system is an open brayton cycle power generation system in which the heating source is Concentrating Solar Power. Multiple embodiments are described which permit various modes of operation and improved overall efficiency. | 10-11-2012 |
20120260673 | COOLING SYSTEM UTILIZING A RECIPROCATING PISTON - Cooling in the supersonic region of a compressible fluid is disclosed. The fluid is accelerated by a reciprocating piston to a velocity equal to or greater than the speed of sound in the fluid in an evaporator. No conventional mechanical pump is required to accelerate the fluid. A phase change of the fluid due to a pressure differential may be utilized to transfer heat from an element to be cooled. | 10-18-2012 |
20120279234 | Linear Electrodynamic-Type Motor, Cryocooler Including Such a Motor and Method Implementing Such a Motor - This motor includes:
| 11-08-2012 |
20120285181 | GAS BALANCED CRYOGENIC EXPANSION ENGINE - An expansion engine operating on a Brayton cycle which is part of a system for producing refrigeration at cryogenic temperatures that includes a compressor, a counter-flow heat exchanger, and a load that may be remote, which is cooled by gas circulating from the engine. The engine has a piston in a cylinder which has nearly the same pressure above and below the piston while it is moving. Low pressure on a piston drive stem provides a force imbalance to move the piston towards the warm end. | 11-15-2012 |
20120304668 | REGENERATOR, GM TYPE REFRIGERATOR AND PULSE TUBE REFRIGERATOR - A helium-cooling type regenerator includes first and second storage spaces. The first storage space is disposed in a region on a high-temperature side, and accommodates the regenerator material whose pressure is P | 12-06-2012 |
20120312032 | CRYOPUMP AND CRYOGENIC REFRIGERATOR - A refrigerator includes two displacers which are longitudinally adjacent to each other and the high temperature displacer includes a main compartment and an auxiliary compartment for a regenerator material. A direct passage for operating gas is formed between the two displacers. A cryopump includes a low temperature cryopanel, a radiation shield which is cooled to a higher temperature than that of the low temperature cryopanel, and the refrigerator. | 12-13-2012 |
20120317994 | REGENERATIVE TYPE REFRIGERATOR - A disclosed regenerative type refrigerator includes a cylinder expanding a refrigerant gas; a regenerator accumulating cold thermal energy and being provided inside the cylinder so as to be reciprocate inside the cylinder; a rotary drive portion generating driving force; a rotary member being rotated by the rotary drive portion; and a bearing member supporting the rotary member and including an inner wheel, an outer wheel, and two sealing members encapsulating a lubricant agent and being provided on sides of the outer wheel and the inner wheel, wherein the sealing members are fixed to one of the inner wheel member and the outer wheel member, and a gap is formed between the two sealing members and another one of the inner wheel member and the outer wheel member. | 12-20-2012 |
20130000326 | REGENERATOR, GM REFRIGERATOR, AND PULSE TUBE REFRIGERATOR - A helium-cooling type regenerator configured to retain cold temperatures of working gas includes a first section through which the working gas flows, a second section configured to accommodate helium gas as a regenerator material, and a regenerator material pipe connected to the second section and to a helium source. | 01-03-2013 |
20130008184 | DISPLACER, MANUFACTURING METHOD THEREOF, AND REGENERATIVE TYPE REFRIGERATOR - A disclosed displacer to be inserted into a cylinder to expand a compressed working fluid inside the cylinder by reciprocation of the displacer inside the cylinder includes a cylindrical member; and a regenerative material included inside the cylindrical member, wherein a groove is formed on an outer peripheral surface of the cylindrical member, the outer peripheral surface facing the cylinder, and a sealing film is continuously formed on the outer peripheral surface and the groove over an area where the groove is formed in a longitudinal direction. | 01-10-2013 |
20130014517 | LIQUEFIER WITH PRESSURE-CONTROLLED LIQUEFACTION CHAMBER - A liquefier includes a Dewar having a storage portion and a neck portion extending therefrom. A hermetically isolated liquefaction chamber is disposed within the neck of the Dewar. One or more control components including a temperature and pressure sensor are coupled to a CPU and disposed within the liquefaction chamber for dynamic control of liquefaction conditions. A gas flow control is coupled to the CPU for regulating an input gas flow into the liquefaction chamber. A volume surrounding the liquefaction chamber may be adapted to provide a counter-flow heat exchange. These and other features provide improved liquefaction efficiency among other benefits. | 01-17-2013 |
20130014518 | Refrigeration Method and Apparatus with a Pulsating LoadAANM Aigouy; GeraldAACI La Croix De La RochetteAACO FRAAGP Aigouy; Gerald La Croix De La Rochette FRAANM Briend; PierreAACI SeyssinetAACO FRAAGP Briend; Pierre Seyssinet FRAANM Deschildre; CindyAACI SassenageAACO FRAAGP Deschildre; Cindy Sassenage FRAANM Fauve; EricAACI BolleneAACO FRAAGP Fauve; Eric Bollene FRAANM Bernhardt; Jean-MarcAACI La BuisseAACO FRAAGP Bernhardt; Jean-Marc La Buisse FRAANM Delcayre; FranckAACI River Sur FureAACO FRAAGP Delcayre; Franck River Sur Fure FR - A method for the pulsating load refrigeration of a component of a Tokamak, said method using a refrigeration device subjecting a working fluid such as helium to a working cycle, the Tokamak comprising at least one operating mode called “periodic and symmetrical,” according to the method, the refrigerating power produced by the refrigeration device being increased to a relatively high level when the Tokamak is in a plasma generating phase (Dp) whereas the refrigerating power produced by the refrigeration device is reduced to a relatively low level when the Tokamak is no longer in a plasma generating phase (Dnp), characterized in that during the “periodic and symmetrical” operating phase of the Tokamak, the refrigerating power of the refrigeration device is regulated according to a forced variation also of the “periodic and symmetrical” type, that is one wherein the respective durations of generation of a high level of refrigeration and of generation of a low level of refrigerating power differ at most by 30%, and in that the variation in refrigerating power brings about gradual increases and reductions in refrigerating power, and in that the increase in refrigerating power produced by the refrigeration device is triggered in advance, in response to a signal (S) generated during a plasma starting step in the Tokamak, that is before the thermal load on the component increases. | 01-17-2013 |
20130025297 | ROTARY VALVE AND CRYOGENIC REFRIGERATOR USING SAME - A rotary valve includes a valve body and a valve plate. The valve body has a body-side passage formed therein, and includes a first slide surface. The valve plate has a plate-side passage formed therein, and includes a valve plate body and a resin valve slide body. The valve plate body is formed of a non-magnetic material and includes an accommodation room. The resin valve slide body is accommodated in the accommodation room of the valve plate body. The resin valve slide body includes a second slide surface in close contact with the first slide surface of the valve body. The valve plate rotates to switch a state of connection of the body-side passage and the plate-side passage. | 01-31-2013 |
20130031915 | STIRLING ENGINE DISPLACER DRIVE - In one embodiment, as cryocooler is provided that includes: a regenerator piston; a drive coupler; and a link flexure having a proximal end coupled by a first pin to the drive coupler and having a distal end coupled by a second pin to the regenerator piston, wherein the link flexure forms a vane having flattened opposing faces that are orthogonal to a longitudinal axis for the first and second pin. | 02-07-2013 |
20130031916 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a cylinder configured to be fed with a refrigerant gas, a displacer configured to reciprocate in the cylinder, a drive unit configured to cause the displacer to reciprocate in the cylinder, and a connecting mechanism connecting the drive unit and the displacer. The connecting mechanism includes an output shaft extending from the drive unit toward the displacer, an engagement pin provided through the output shaft to extend in directions to cross the reciprocating directions of the displacer, a rotation prevention mechanism configured to engage with the engagement pin to prevent a further rotation of the displacer when the displacer rotates, and a lid body fixed to an end portion of the displacer and engaging with the output shaft. | 02-07-2013 |
20130047632 | GAS LIQUEFACTION SYSTEM AND METHOD - A system and a method for liquefaction of gases which are utilized in their liquid state as refrigerants in applications that require low temperatures, throughout various pressure ranges, from slightly above atmospheric pressures to pressures near the critical point. The system and method are based on closed-cycle cryocoolers and utilize the thermodynamic properties of the gas to achieve optimal liquefaction rates. | 02-28-2013 |
20130061606 | INTEGRATED STIRLING REFRIGERATOR - An integrated Stirling refrigerator is composed of two parts: a compressor and an expander. The compressor is composed of a shell ( | 03-14-2013 |
20130067936 | CRYOGENIC REFRIGERATOR - A disclosed cryogenic refrigerator includes a first stage displacer; a first stage cylinder configured to form a first expansion between the first stage cylinder and the first stage displacer; a second stage displacer connected to the first stage displacer; and a second stage cylinder configured to form a second expansion space between the second stage cylinder and the second stage displacer, wherein a helical groove is formed on an outer peripheral surface of the second stage displacer so as to helically extend from a side of the second expansion space toward the first stage displacer, the helical groove communicates with the first expansion space, and a cross-sectional area of the helical groove becomes smaller from a side of the second expansion space to a side of the first expansion space. | 03-21-2013 |
20130074522 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a Scotch yoke mechanism including a Scotch yoke and a bearing movably engaged with the Scotch yoke, and a displacer caused to reciprocate in a cylinder by the Scotch yoke mechanism, so that a refrigerant gas inside an expansion space formed in the cylinder is expanded by the reciprocation of the displacer to generate cold temperatures. The Scotch yoke includes a concave part at a position corresponding to a top dead center of the displacer. | 03-28-2013 |
20130074523 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a cylinder, a displacer configured to be moved back and forth in the cylinder by a drive unit, an inlet valve configured to be opened in supplying a refrigerant gas into the cylinder, an exhaust valve configured to be opened in exhausting the refrigerant gas from the cylinder, and an expansion space formed in the cylinder and configured to generate a cooling by expanding the refrigerant gas caused by back and forth movement of the displacer. A moving speed of the displacer in the vicinity of a bottom dead center is set to be faster than the moving speed of the displacer in the vicinity of a top dead center. | 03-28-2013 |
20130074524 | CRYOGENIC REFRIGERATOR - A disclosed device cryogenic refrigerator includes a first stage displacer; a first stage cylinder configured to form a first expansion space between the first stage cylinder and the first stage displacer; a second stage displacer connected to the first stage displacer; and a second stage cylinder configured to form a second expansion space between the second stage cylinder and the second stage displacer, wherein a helical groove is formed on an outer peripheral surface of the second stage displacer so as to helically extend from a side of the second expansion space toward the first stage displacer, wherein the second stage cylinder includes a first flow resistor communicating with a side of the first stage displacer in the helical groove, and a buffer portion communicating with a side of the first stage displacer in the first flow resistor. | 03-28-2013 |
20130081410 | REFRIGERATION DEVICE, HYDROGENATION DEVICE FOR NITROGEN, AND LEAKED GAS REMOVING METHOD - A refrigeration device of an embodiment includes: a heat-insulating vacuum chamber; a refrigerator cryogenic unit that is provided in the heat-insulating vacuum chamber and is cooled to a lower temperature than 195 K; a catalytic electrode that is provided in the heat-insulating vacuum chamber and contains a transition metal at least in part of a surface thereof; a power supply that applies a voltage to the catalytic electrode; and a heating unit that is provided in the heat-insulating vacuum chamber and heats the catalytic electrode. In this refrigeration device, the catalytic electrode is insulated from the heat-insulating vacuum chamber and the heating unit, and the heating unit is insulated from the heat-insulating vacuum chamber and the catalytic electrode. | 04-04-2013 |
20130081411 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a refrigerator body configured to produce cold temperatures by expanding a refrigerant gas; a compressor connected to a first pipe for feeding the refrigerant gas of a first pressure to the refrigerator body, and connected to a second pipe for collecting the refrigerant gas of a second pressure lower than the first pressure from the refrigerator body; a buffer tank configured to store the refrigerant gas; a first valve provided in a first connecting pipe connecting the buffer tank and the refrigerator body; a second valve provided in a second connecting pipe connecting the buffer tank and the first pipe; and a third valve provided in a third connecting pipe connecting the buffer tank and the second pipe. | 04-04-2013 |
20130086925 | CRYOGENIC REFRIGERATOR - A disclosed device cryogenic refrigerator includes a first stage displacer; a first stage cylinder configured to form a first expansion space between the first stage cylinder and the first stage displacer; a second stage displacer connected to the first stage displacer; and a second stage cylinder configured to form a second expansion space between the second stage cylinder and the second stage displacer, wherein the second stage displacer includes a helical groove formed on an outer peripheral surface of the second stage displacer so as to helically extend from the second expansion space, a flow resistor communicating with a side of the first stage displacer in the helical groove, and a flow path connecting the flow resistor to a side of the first expansion space, wherein the flow resistor is always positioned on a side of the second expansion space relative to the first expansion space. | 04-11-2013 |
20130086926 | CRYOGENIC REFRIGERATOR, CRYOPUMP AND DISPLACER - A two-stage GM cryogenic refrigerator includes a displacer having a low-temperature side and a high-temperature side and a motor configured to drive the displacer. The motor is configured to be rotatable forward in cooling and backward in increasing a temperature. The cryogenic refrigerator further includes a resin provided on an outer circumferential surface of the displacer. A thickness of the resin is thinner on the high-temperature side than on the low-temperature side. | 04-11-2013 |
20130091869 | INTEGRAL COMPRESSOR-EXPANDER - An integral compressor-expander assembly, including a cryogenic expander positioned in an overhung configuration on a central shaft; a multi-stage centrifugal compressor supported on the central shaft between at least two bearings; and a device coupled to the central shaft and configured to either supply rotational power to the central shaft or generate power from rotation of the central shaft, depending upon a current operational mode of the multi-stage compressor. | 04-18-2013 |
20130111927 | Cooling device for Stirling circulated dry storage container - A cooling device for Stirling circulated dry storage container, which is mainly to make an accommodation space with opening within an external shield, and at the peripherals of the accommodation space, it is installed with a plurality of air flow inlets and air flow outlets that are connected to the external side. In addition, a shield cover is used to cover the opening of the accommodation space, and a nuclear waste storage container is installed within the accommodation space of the external shield, and the peripheral of the accommodation space and the nuclear waste storage container forms an air flow channel. | 05-09-2013 |
20130133341 | Cryorefrigeration Device and Method of Implementation - The invention proposes a reliable high-performance cryorefrigeration device, the level of thermal oscillations of which may be minimized so as to be below a threshold value. For this purpose, the subject of the invention is a cryorefrigeration device comprising N periodically operating cryorefrigerators ( | 05-30-2013 |
20130139525 | Method for Estimating the Heat Load Imposed on a Cryogenic Refrigerator, Associated Program Product, and Method for Controlling the Refrigerator - The invention relates to a method for estimating a heat load imposed on a cryogenic refrigerator, to an associated computer program product, and to a method for controlling the cooling power output by said refrigerator. As the refrigerator ( | 06-06-2013 |
20130152606 | HEATING AND COOLING DEVICE - A heating and cooling device includes a cylinder having a chamber for receiving a gas. A guiding groove is defined in an inner periphery of the chamber. A piston assembly is movably received in the chamber of the cylinder. The piston assembly includes first and second pistons and a connecting rod connected to the first and second pistons. The first piston is mounted to a side of the second piston and rotatable relative to the connecting rod. Each of the first and second pistons includes a plurality of openings. A guiding block is formed on an outer periphery of the first piston and is slideably received in the guiding groove. | 06-20-2013 |
20130160468 | CRYOPUMP SYSTEM, CRYOGENIC SYSTEM, AND APPARATUS AND METHOD OF CONTROLLING COMPRESSOR UNIT - A compressor controller includes: a control amount calculation unit configured to calculate at least two control amounts including a first control amount for controlling a first control object that relates to a gas amount for cooling a cryogenic apparatus, and a second control amount for controlling a second control object that relates to the refrigerant gas amount and that is different from the first control object, the second control amount being common with the first control amount; and a selection unit configured to select a control object to be controlled from at least two control objects including the first control object and the second control object on the basis of a comparison between the at least two common control amounts. | 06-27-2013 |
20130174582 | CRYOGENIC REFRIGERATOR AND DISPLACER - A cryogenic refrigerator includes a displacer including a body part and a heat conducting part, wherein the material of the heat conducting part has a higher thermal conductivity than the body part; a cylinder accommodating the displacer in such a manner as to allow the displacer to reciprocate in the axial directions of the cylinder, wherein an expansion space is formed between the cylinder and a low temperature end of the displacer; a clearance channel formed between the displacer and the cylinder so as to allow a refrigerant gas to flow into the expansion space; and a cooling stage positioned adjacent to the expansion space. The heat conducting part faces the cooling stage across the clearance channel. | 07-11-2013 |
20130186109 | COUNTER FLOW HEAT EXCHANGER FOR A MINIATURE JOULE-THOMSON CRYOCOOLER - A counter flow heat exchanger comprising a body formed of stacked, fused, ceramic sheets. The sheets comprising: a bottom sheet, a second sheet, a third sheet, a fourth sheet and a top sheet. The sheets have punched holes such that when the sheets are aligned there is an inlet hole spanning from the top sheet to the fourth sheet, an outlet hole spanning from the top sheet to the second sheet, and an inflow hole spanning from the fourth sheet to the second sheet. Within the second sheet, a low pressure flow channel connects the outlet hole with the inflow hole. Within the fourth sheet, the inlet hole flows into a high pressure flow channel which flows into a narrow flow path which then empties into the inflow hole. The high pressure flow channel is aligned with the low pressure flow channel to allow for heat exchange. | 07-25-2013 |
20130192273 | GAS LIQUEFACTION SYSTEM AND METHOD - A system and a method for liquefaction of gases which are utilized in their liquid state as refrigerants in applications that require low temperatures, throughout various pressure ranges, from slightly above atmospheric pressures to pressures near the critical point. The system and method are based on closed-cycle cryocoolers and utilize the thermodynamic properties of the gas to achieve optimal liquefaction rates. | 08-01-2013 |
20130219923 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a first cylinder and a second cylinder, a first displacer and a second displacer configured to reciprocate inside the first cylinder and the second cylinder, respectively, an intake and outlet system configured to alternately perform a first operation of supplying gas to the first cylinder and discharging the gas from the second cylinder and a second operation of discharging the gas from the first cylinder and supplying the gas to the second cylinder, a communication path configured to communicate the first cylinder with the second cylinder, and an opening and closing part configured to open and close the communication path. | 08-29-2013 |
20130247592 | REGENERATIVE REFRIGERATOR - A regenerative refrigerator includes a regenerator disposed in a flow passage of working gas generating a cold thermal mass, the regenerator being loaded with a regenerative material to accumulate cold thermal energy from the cold thermal mass in the working gas, wherein the regenerative material is a sintered body made of a fiber material, and a diameter of the fiber material disposed at a low-temperature end of the regenerator is smaller than a diameter of the fiber material disposed at a high-temperature end of the regenerator. | 09-26-2013 |
20130247593 | PULSE TUBE REFRIGERATOR AND METHOD OF OPERATING THEREOF - A pulse tube refrigerator includes a compressor, a pulse tube including an internal space, a regenerator loaded with a regenerative material for exchanging heat with working gas, a buffer including an internal space with a predetermined capacity, a flow passage to connect an end of the pulse tube and the buffer, a temperature detecting section to detect temperature of the working gas, a flow adjusting section to adjust an amount of flow of the working gas flowing through the flow passage, and a controlling section to control the flow adjusting section in response to the temperature of the working gas detected at the temperature detecting section. | 09-26-2013 |
20130263607 | REGENERATIVE REFRIGERATOR - A regenerative refrigerator includes an expander which includes a regenerator including a regenerative material and an expansion space for expanding a refrigerant gas flowing in the regenerator, the regenerator being configured such that a temperature profile at a predetermined temperature range in the regenerator is selectively higher than a case when lead is used as the regenerative material. | 10-10-2013 |
20130283823 | MULTISTAGE PULSE TUBE COOLERS - A cryocooler may comprise a first stage, a second stage and a phase control device. The first stage may define a first volume. The second stage may define a second volume. The phase control device may be positioned between the first stage and the second stage to receive a flow of working fluid between the first stage and the second stage. The phase control device may comprise a flange and a plunger. The flange may be positioned along a longitudinal axis parallel a direction of the working fluid flow. The plunger may be translatable along the longitudinal axis at least partially within the flange. The plunger and the flange may be sized such that the plunger and the flange define a gap there between and a dimension of the gap is determined by a position of the plunger along the longitudinal axis. | 10-31-2013 |
20130291565 | PULSE TUBE REFRIGERATOR AND REGENERATIVE REFRIGERATOR - A pulse tube refrigerator includes a first pulse tube; a first regenerator connected to the first pulse tube; a compressor configured to compress the coolant gas; a first supply side valve; a first filter provided between a supply side of the first supply side valve and the high temperature end of the first regenerator; a first suction side valve connected to the first filter via a first joint point; a first self seal joint provided between the supply side of the compressor and a suction side of the first supply side valve; a second self seal joint provided between a supply side of the first suction side valve and the suction side of the compressor; and a third self seal joint provided between a first regenerator side of the first filter and the high temperature end of the first regenerator. | 11-07-2013 |
20130291566 | Pulse Tube Refrigerator with an Automatic Gas Flow and Phase Regulating Device - The invention relates to a pulse tube refrigerator with an automatic gas flow and phase regulating device, comprising a helium compressor ( | 11-07-2013 |
20130305744 | CNG DELIVERY SYSTEM WITH CRYOCOOLER AND METHOD OF SUPPLYING PURIFIED CNG - A fuel gas delivery system is provided. The fuel gas delivery system includes a feed line configured to provide a natural gas stream and a cryocooler fluidly coupled to the feed line. The cryocooler is configured to condense the natural gas to provide a liquefied natural gas (LNG) stream and to freeze impurities contained in the natural gas stream. The frozen impurities are separated from said LNG stream. A first heat exchanger is fluidly coupled to the cryocooler and the first heat exchanger is configured to vaporize at least a portion of the LNG stream to provide compressed natural gas. A delivery line is configured to supply the compressed natural gas to an end user and a removal line is configured to remove the impurities from the fuel gas delivery system. | 11-21-2013 |
20130312427 | AIR COMPRESSION SYSTEM AND METHOD - An air compression system and method for an air separation plant in which air is compressed in a series of compression stages and a temperature swing adsorption unit adsorbs water vapor and carbon dioxide. The temperature swing adsorption unit is situated at a location of the compression stages such that air pressure upon entry into the adsorbent beds is between about 400 psia and about 600 psia. Each of the adsorbent beds of the unit have a minimum transverse cross-sectional flow area that will set the air velocity of the air to a level below that at which adsorbent bed fluidization would occur. Such operation allows fabrication costs of the adsorbent beds to be reduced because less adsorbent and smaller adsorbent beds are required while power consumption will be at a minimum. | 11-28-2013 |
20130312428 | COOLING SYSTEM AND MAINTENANCE TIMING DETERMINATION METHOD - A cooling system includes a refrigerator and a thermal load application unit applying a thermal load to the refrigerator. A detector detects, when the thermal load is applied to the refrigerator by the thermal load application unit, a change in a physical quantity generated in the refrigerator or a refrigerator-mounting portion where the refrigerator is mounted. A determiner determines a maintenance timing of the refrigerator based on the change in the physical quantity detected by the detector. | 11-28-2013 |
20130312429 | METHOD AND APPARATUS FOR THERMOACOUSTIC COOLING - Apparatus comprising at least one transducer comprising a displacement component that is configured to move upon application of an electrical signal; a cavity in communication with the at least one transducer; and at least one thermodynamic member within the cavity configured to readily exchange heat with a cavity gas or fluid, wherein the transducer is configured to generate a standing wave within the cavity to transfer heat along the thermodynamic member. | 11-28-2013 |
20130327065 | CRYOGENIC REFRIGERATOR AND DISPLACER - A cryogenic refrigerator includes a displacer having a flow channel that supplies a refrigerant gas to a regenerator; and a cylinder that accommodates the displacer so as to be movable in an axial direction, has a heat diffusion portion at a high-temperature end portion thereof, and forms a space portion together with a high-temperature end of the displacer. A clearance is formed between an outer peripheral surface of the displacer and an inner peripheral surface of the cylinder. The flow channel is made to open to the outer peripheral surface of the displacer, and the refrigerant gas within the room-temperature chamber flows into the regenerator through the clearance and the flow channel. | 12-12-2013 |
20140013775 | CRYOGENIC REGENERATOR MANUFACTURING METHOD AND CRYOGENIC REGENERATOR - A method of manufacturing a cryogenic regenerator includes the steps of supplying helium gas to a helium gas sealing tube having a front end portion and a rear end portion that are open; sealing the rear end portion of the helium gas sealing tube; cooling the helium gas sealing tube and filling the helium gas into the cooled helium gas sealing tube from a helium gas supplying unit; and sealing the front end portion of the helium gas sealing tube after the helium gas sealing tube is filled with the helium gas. | 01-16-2014 |
20140013776 | SYSTEM, APPARATUS AND METHOD FOR COMPRESSOR HUB WITH AN INTEGRATED RECTIFYING SYSTEM FOR DC FLOW - A system, apparatus and method for a compressor hub assembly configured for use with a dual piston compressor is provided and includes a cylindrically shaped body having a centrally located inner wall and defining cylinder sealing surface for receiving and maintaining at least one compressor pump; a plurality of bores integrated within the body, the bores defining at least one fill port, a fluid inlet port, an output port, at least two compression bores, an off-center cross-bore interconnected with the one of the at least two compression bores, and at least one reservoir passages; at least one check-valve assembly disposed in the output port, the check valve assembly including a check valve, a valve seal and a valve retainer, wherein the use of the check valve assembly and the plurality of bores produces a continuous DC flow output when fluid is flowed through the compressor pump and into the hub assembly. | 01-16-2014 |
20140020407 | REGENERATIVE REFRIGERATOR - A disclosed regenerative refrigerator including a regenerator filled with a regenerative material for accumulating cooling of a refrigerant gas, wherein the regenerator is divided into a central region and a peripheral region on a cross-sectional face of the regenerator, and a specific heat of the central region is larger than a specific heat of the peripheral region. | 01-23-2014 |
20140020408 | VEHICLE AND STORAGE LNG SYSTEMS - LNG, for use as a motor vehicle fuel, is stored in a manner that does not require massive tanks, eliminates evaporative loss and reduces refrigeration energy consumption. A Stirling cryocooler extends through a wall of a highly insulated, relatively low pressure container to its cold end located in the vapor phase above the liquid surface. The pressure or temperature of the LNG is sensed and applied to a feedback control that modulates the heat transfer rate of the Stirling cryocooler so that LNG vapor is liquefied at a rate to maintain a desired pressure and temperature within the container. Maintaining a superatmospheric pressure in the container reduces the energy consumption required for re-liquefaction of the LNG vapor. The apparatus is also usable for liquefaction of natural gas for refueling vehicles from the ubiquitous consumer level domestic gas distribution system. | 01-23-2014 |
20140020409 | CRYOCOOLER WITH VARIABLE COMPRESSION DEPENDING ON VARIATIONS IN LOAD - A cryocooler, includes a cylinder filled with gas. A piston rectilinearly reciprocates inside of the cylinder and compresses or expands the gas. A connecting rod has a first side coupled to the piston and moves with the piston, and a second side having a first thread along an outer circumference thereof. A linear motor rectilinearly reciprocates a motor shaft toward the connecting rod in accordance with a control signal. A sleeve has two open sides, so that an end portion of the motor shaft can be supported by and inserted in one open side, and the second side of the connecting rod can be inserted in the other open side, and an inner circumference of the sleeve is formed with a second thread that engages with the first thread of the connecting rod and rotates to adjust a distance between the motor shaft and the connecting rod. | 01-23-2014 |
20140026596 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a cylinder, a displacer accommodated in the cylinder so as to reciprocate inside the cylinder with a gap formed between the periphery of the displacer and the interior surface of the cylinder, and a depressed part formed on at least one of the periphery of the displacer and the interior surface of the cylinder. The ratio of the volume of the depressed part to the volume of the gap satisfies a condition of 8≦Vd/Vg≦75, where Vd is the volume of the depressed part and Vg is the volume of the gap. | 01-30-2014 |
20140041397 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a displacer that is reciprocably mounted within a cylinder; a spool valve that is connected to the compressor and performs switching between an intake mode where a high-pressure refrigerant gas is supplied from the compressor to the cylinder and an exhaust mode where a low-pressure refrigerant gas within the cylinder is made to flow back to the compressor; and a drive unit that drives the spool valve. The spool valve has a valve body, and a drive rod that moves relative to the valve body and is integrated with the spool. The drive unit performs driving so that the magnitude of a speed when the drive rod moves from a top dead center to a bottom dead center is different from the magnitude of a speed when the drive rod moves from the bottom dead center to the top dead center, at the same displacement position. | 02-13-2014 |
20140069115 | CRYOCOOLER HAVING VARIABLE-LENGTH INERTANCE CHANNEL FOR TUNING RESONANCE OF PULSE TUBE - A system includes a pulse tube, a compressor configured to create pulses of fluid in the pulse tube, and a surge tank. The surge tank includes a housing that defines a surge volume configured to receive the fluid from the pulse tube. An inertance channel defines a passageway through which the fluid flows to and from the surge volume. At least part of the inertance channel has an open side to the surge volume. The surge tank also includes an adjustable seal configured to block at least part of the open side of the inertance channel and to move in order to change a functional length of the inertance channel. The housing may include a material having a high coefficient of thermal expansion, and the adjustable seal may include a material having a low coefficient of thermal expansion. | 03-13-2014 |
20140069116 | CRYOGENIC COOLING DEVICE AND METHOD - Cryogenic cooling method and device comprising a main cryogenic cooler comprising a cold head positioned in a first chamber selectively placed under vacuum, a reservoir of working fluid placed in a second chamber selectively placed under vacuum, a member to be cooled being placed in the reservoir in heat exchange with the working fluid, the cold head of the main cryogenic cooler being thermally connected to a heat exchanger which is itself fluidically connected to the reservoir via pipes forming a first circulation loop for the working fluid, the pipes passing from the first to the second chamber, characterized in that the volumes selectively under vacuum of the first and second chambers are independent and in that the device comprises a secondary cryogenic cooler comprising a cold head placed in a third chamber selectively placed under vacuum, the cold head of the secondary cryogenic cooler being thermally connected to a heat exchanger which is itself fluidically connected to the reservoir via pipes forming a second circulation loop for the working fluid, and in that the volume selectively under vacuum of the third chamber is independent of the volumes selectively under vacuum of the first and second chambers. | 03-13-2014 |
20140090404 | CRYOCOOLER-BASED GAS SCRUBBER - A cryocooler-based gas scrubber, or cryocooler-based gas purifier, utilizes the cooling power of a cryocooler to cool and condense cryogen gas forming coalesced impurities which are then filtered through a filter matrix, such as for example a fiberglass filter matrix. The scrubber may further comprise a counter-flow heat exchanger for warming the purified gas prior to dispensing at an outlet for storage or consumption. | 04-03-2014 |
20140109598 | STIRLING REFRIGERATOR FOR VEHICLE - A Stirling refrigerator for a vehicle may include a drive portion receiving driving torque to be rotated, a compression portion that may be connected to the drive portion to isothermally compress operational fluid through rotation of a rotation shaft, an expansion portion that may be disposed at one side of the compression portion and isothermally expands the operational fluid that may be compressed by the compression portion through the rotation of the rotation shaft to perform an endothermic reaction, and a regeneration portion that may be disposed at one side of the expansion portion and connects the compression portion with the expansion portion such that the compressed operational fluid may be supplied to the expansion portion. | 04-24-2014 |
20140123684 | Cryogenic Cooling Apparatuses and Systems - An image sensing apparatus includes a focal plane array and a cold shield thermally isolated from the focal plane array. The cryogenic cooling apparatus further includes a first cryocooler assembly comprising a first cold finger thermally coupled to the focal plane array. The first cryocooler assembly is configured to maintain a focal plane array operating temperature. The cryogenic cooling apparatus includes a second cryocooler assembly comprising a second cold finger thermally coupled to the cold shield. The second cryocooler assembly is configured to maintain a cold shield operating temperature that is different from the focal plane array operating temperature. | 05-08-2014 |
20140130520 | APPARATUS AND METHODS FOR IMPROVING VIBRATION ISOLATION, THERMAL DAMPENING, AND OPTICAL ACCESS IN CRYOGENIC REFRIGERATORS - A cryogenic apparatus is provided having a nested thermally insulating structure, thermal links, a vacuum shroud, and a cryo-cooler. The nested thermally insulated structure holds a sample to be cooled while dampening the external vibrations caused by the cryo-cooler, the surrounding environment or cryo-cooler mounting surface. The thermal link is made of thermally conductive wires which connect the nested thermally insulated structure and the cryo-cooler thereby allowing the apparatus to reduce vibrations inherent in the operation of the cryo-cooler. | 05-15-2014 |
20140137571 | SYSTEMS AND METHODS FOR CRYOGENIC REFRIGERATION - Systems and methods for improving the performance of dilution refrigeration systems are described. Filters and traps employed in the helium circuit of a dilution refrigerator may be modified to improve performance. Some traps may be designed to harness cryocondensation as opposed to cryoadsorption. A cryocondensation trap employs a cryocondensation surface having a high thermal conductivity and a high specific heat with a binding energy that preferably matches at least one contaminant but does not match helium. Multiple traps may be coupled in series in the helium circuit, with each trap designed to trap a specific contaminant or set of contaminants. Both cryocondensation and cryoadsorption may be exploited among multiple traps. | 05-22-2014 |
20140174102 | HEAT-ACTUATED DOUBLE-ACTING TRAVELING-WAVE THERMOACOUSTIC REFRIGERATION SYSTEM - The present invention discloses a heat-actuated double-acting traveling-wave thermoacoustic refrigeration system, comprising at least three elementary units; each elementary unit comprises a thermoacoustic engine, a thermoacoustic refrigerator, and a resonance device; the thermoacoustic engine and the thermoacoustic refrigerator comprise a main heat exchanger, a heat regenerator, a non-normal-temperature heat exchanger, a thermal buffer tube, and an auxiliary heat exchanger connected in sequence; the resonance device comprises a sealed housing, a moving part is provided in the housing for a reciprocating motion; the moving part separates the housing into at least two chambers; the main heat exchanger and auxiliary heat exchanger of each thermoacoustic engine and thermoacoustic refrigerator respectively connects to chambers of different housing, forming dual-loop structure of gas medium flow. In heating the non-normal-temperature heat exchanger of the thermoacoustic engine to produce acoustic power, thermoacoustic energy conversion is induced inside the thermoacoustic engine and the thermoacoustic refrigerator. | 06-26-2014 |
20140182311 | RECTIFICATION UNIT FOR STIRLING REFRIGERATOR - A stirling refrigerator may include a compressing portion compressing operating fluid filling a housing by reciprocal motion of a piston, an expanding portion expanding the operating fluid compressed at the compressing portion by reciprocal motion of a piston, and a regenerating portion fluidly communicating the compressing portion with the expanding portion, and may provide heat at the compressing portion and may absorb heat at the expanding portion through repeating isothermal compression, constant-volume process and isothermal expansion of the operating fluid. The rectification unit may be adapted to uniformalize flow of the operating fluid flowing between the compressing portion and the expanding portion. | 07-03-2014 |
20140190186 | CONTAINER - A container is described having a wall with a thickness defined by inner and outer surfaces, said inner surface defining an internal cavity for receiving fluid, the container having an opening through which fluid can enter/exit the container, said opening being connected to a fluid conduit at least a length of which extends through the wall in between the inner and outer surfaces thereof which exits through the inner surface to communicate with the internal cavity. Also described is a pulse tube ref rigerator/cryocooler system including such a container. | 07-10-2014 |
20140202172 | Cold Finger For Cryocoolers - Method for fabricating a cold finger for attachment to a base assembly of a cold head of a Stirling cycle or pulse tube cryocooler. The exterior of a titanium alloy workpiece is machined to form a cylindrical outer surface. The exterior surface of the titanium workpiece is nickel plated and then brazed to a stainless steel workpiece to form an integral body. The brazed stainless steel workpiece is machined to form it into an adapter ring for attachment to the base assembly. An intermediate segment of the titanium workpiece is machined into a cylindrical surface including removing all of the nickel plating from the intermediate segment and removing a portion of underlying titanium alloy to reduce the diameter of the titanium alloy workpiece in order to reduce the thickness of the cold finger wall. The interior of the integral body is machined to form a cylindrical interior surface. | 07-24-2014 |
20140202173 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a compressor that compresses a working gas; a displacer to which the working gas compressed by the compressor is supplied; a drive mechanism that includes a drive shaft and is configured to drive the displacer; a motor that drives the drive mechanism; a housing that accommodates the drive mechanism; a valve mechanism that adjusts a pressure of the working gas supplied to the displacer; a pipe that supplies the working gas from the compressor to the valve mechanism; and a branch pipe that branches out from the supply pipe and is connected to a space formed between the drive shaft and the housing. | 07-24-2014 |
20140202174 | Closed Cycle 1 K Refrigeration System - A closed-cycle refrigerator provides cooling to extremely low temperatures, particularly in the range of 0.5 K to 2.0 K. A 4 K pulse-tube cryocooler cold head or G-M cryocooler cold head liquefies helium in a first cooling chamber at a pressure at approximately 1 atmosphere. Liquid helium flows from the first cooling chamber, through a Joule-Thomson valve, and into a second cooling chamber under a pressure differential created by a pump. Helium vapor extracted from the second cooling chamber by the pump is routed back to the first cooling chamber to be re-condensed. This closed-cycle design provides continuous cooling below 2 K. Cryocooler cold head cold sections have no physical contact with subsequent cooling elements, such as the first and second cooling chambers to reduce vibration transfer. In some embodiments the cryocooler cold head is connected to a vacuum chamber via a vibration damping coupler to further reduce vibration transfer. | 07-24-2014 |
20140202175 | SINGLE-STAGE DOUBLE-ACTING TRAVELING-WAVE THERMOACOUSTIC SYSTEM - The present invention provides a single-stage double-acting traveling-wave thermoacoustic system, comprising three elementary units; each unit comprises a linear motor and a thermoacoustic conversion device. The linear motor comprises a cylinder and a piston; the piston can perform straight reciprocating motion in the cylinder. The thermoacoustic conversion device comprises a first heat exchanger, a heat regenerator, a second heat exchanger, a thermal buffer tube and a third heat exchanger connected in sequence, the first heat exchanger and the third heat exchanger of each thermoacoustic conversion device are connected to cylinder cavities of different linear motors respectively, forming a loop structure of a gas medium flow. The system comprises a thermal buffer tube and a third heat exchanger, making the temperature of gas medium given feedback to the cylinder cavity of another linear motor be close to the room temperature, ensuring the piston and cylinder working at room temperature. | 07-24-2014 |
20140208774 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a compressor that compresses a working gas; an expansion chamber where the working gas compressed by the compressor expands and generates cooling; a valve mechanism including a stator valve and a rotor valve, which rotates with respect to the stator valve; and a forcing mechanism that applies a force to one of the rotor valve or the stator valve toward the other one of the rotor valve or the stator valve. The valve mechanism is configured to switch a flow of the working gas between the compressor and the expansion chamber as the rotor valve rotates. The forcing mechanism is arranged such that the center of the force applied by the forcing mechanism deviates from the center of the valve mechanism. | 07-31-2014 |
20140216064 | EXTENDED TRAVEL FLEXURE BEARING AND MICRO CHECK VALVE - Variations of the devices and methods disclosed herein pertain to an extended travel spiral flexure bearing having spiral arms, each of the spiral arms including an attachment point at the inner end thereof and at the outer end thereof. Variations of the bearing may also include a bearing clamp to be attached to the spiral flexure bearing at the attachment points, the bearing including an outer bearing portion to be disposed on the outer periphery of the flexure bearing and an inner bearing portion to be disposed at the center of the flexure bearing. Variations also pertain to a micro check valve assembly that includes a valve base, a valve cover, and a flexure that are all bonded together. The valve being closed when the valve door rests on the valve seat and open when the valve door is lifted from the valve seat. | 08-07-2014 |
20140230456 | APPARATUS FOR ACHIEVING CRYOGENIC TEMPERATURE IN MOVABLE SYSTEM - An apparatus for achieving a cryogenic temperature in a movable system, includes a rotating table, a vacuum chamber which is fixed on the rotating table, a cryogen-free refrigerator which has a cooling section inside the vacuum chamber, an inner cylinder which is fixed to a bottom of the rotating table, an outer cylinder which stores the inner cylinder such that the inner cylinder is rotatable and includes an outward and return gas port which is provided to be continuous with gas passages, a compressor which circulates gas to the cryogen-free refrigerator through the outward and return gas passages, and a rotary joint for wiring which is fixed to the inner cylinder and rotatably conducts electricity, wherein a piece of internal wiring is led through a through-hole and a hole, and electricity is supplied to a piece of equipment on the rotating table through the piece of internal wiring. | 08-21-2014 |
20140230457 | PULSE TUBE REFRIGERATOR/CRYOCOOLER APPARATUS - A pulse tube refrigerator/cryocooler apparatus including: an inlet for receiving a cyclically moving volume of gas; a regenerator device fluidly connected to the inlet for storing and recovering thermal energy from the gas; a pulse tube fluidly connected to the regenerator; and a conduit fluidly connected at one end to the pulse tube and fluidly connected at its opposite end to a container, said container providing a storage volume for gas, wherein apparatus is configured such that the cyclically moving gas enters the regenerator in a direction parallel to its elongate axis. | 08-21-2014 |
20140238047 | CRYOGENIC REFRIGERATOR - A disclosed cryogenic refrigerator includes a first refrigerator including a compressor, a regenerator which performs intake or ejection of a refrigerant gas relative to the compressor, and a pulse tube whose low temperature end is connected to a low temperature end of the regenerator; a second refrigerator having an output smaller than the first refrigerator; a connecting pipe which performs intake and ejection of the refrigerant gas relative to a high temperature end of the pulse tube and the second refrigerator; and a flow control valve which is provided in the connecting pipe and performs a flow control of the refrigerant gas flowing inside the connecting pipe. | 08-28-2014 |
20140245754 | CRYOGENIC REFRIGERATION APPARATUS AND METHOD OF CONTROLLING CRYOGENIC REFRIGERATION APPARATUS - A cryogenic refrigeration apparatus includes a compressor, a plurality of refrigerators, and a gas line configured to connect the plurality of refrigerators to the compressor in parallel so as to circulate a working gas between each of the plurality of refrigerators and the compressor. The gas line may include a flow rate control valve capable of individually controlling a pressure drop of a flow of working gas in a corresponding one of the plurality of refrigerators. The flow rate control valve may be provided in series with the corresponding refrigerator. | 09-04-2014 |
20140250920 | PULSE TUBE REFRIGERATOR - A pulse tube refrigerator includes a compressor, a regenerator to which a refrigerant gas is discharged from the compressor and from which the refrigerant gas returns to the compressor, a pulse cube including a low-temperature end connected to the low-temperature end of the regenerator, and a flow rate controller provided at the low-temperature end of the regenerator. The flow rate controller is configured to control the flow rate of a first DC flow flowing from the regenerator toward the pulse tube and the flow rate of a second DC flow flowing from the pulse tube toward the regenerator, so that the flow rate of the first DC flow is greater than the flow rate of the second DC flow. | 09-11-2014 |
20140260336 | METHOD OF REGULATING THE TEMPERATURE OF AN ELEMENT COOLED BY A CRYOREFRIGERATOR WITH PERIODIC OPERATION, ASSOCATED IMPLEMENTATION DEVICE AND CRYOGENIC INSTALLATION COMPRISING THIS DEVICE - The invention relates to a method of regulating the temperature of an element cooled by a cryorefrigerator with periodic operation, characterized in that it comprises the following steps: (a) measuring at least the periodic temporal evolution of the temperature T of the element, this evolution making it possible to obtain a temperature signal representative of the periodic operation of the cryorefrigerator; (b) constructing a periodic so-called equivalent thermal flux signal (Soeq), as a function of the temperature signal obtained in step (a); (c) constructing a thermal flux control signal, depending on the equivalent thermal flux signal constructed in step (b), said thermal flux control signal serving also, in return, for the construction of the equivalent thermal flux signal (ScDeq, S*oeq) during step (b); (d) injecting a thermal flux into the element, on the basis of the thermal flux signal constructed in step (c), so as to compensate for the measured periodic variations of the temperature T of the element. | 09-18-2014 |
20140290276 | U-SHAPED PULSE-TUBE REFRIGERATOR - A U-shaped pulse-tube refrigerator includes a regenerative tube and a pulse-tube that are juxtaposed with each other; a communicating path that connects a low-temperature end of the regenerative tube and a low-temperature end of the pulse-tube; a heat exchanger that is provided at the low-temperature end of at least one of the regenerative tube and the pulse-tube; and a flow smoothing member that is provided between a first exit of the communicating path at a side where the heat exchanger is provided and the heat exchanger. | 10-02-2014 |
20140290277 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a compressor which compresses a working gas, a housing which includes a space which the working gas compressed by the compressor flows into and flows from, a cylinder of which an end is connected to the housing and which includes an expansion space at the other end, and a displacer which permits flowing of the working gas into and from the expansion space via a working gas channel provided in an inner portion of the displacer while reciprocating in an inner portion of the cylinder. The working gas flows through a pipe which communicates with the space and the working gas channel. | 10-02-2014 |
20140290278 | GAS BALANCED CRYOGENIC EXPANSION ENGINE - An expansion engine operating on a Brayton cycle which is part of a system for producing refrigeration at cryogenic temperatures that includes a compressor, a counter-flow heat exchanger, and a load that may be remote, which is cooled by gas circulating from the engine. The engine has a piston in a cylinder which has nearly the same pressure above and below the piston while it is moving. Low pressure on a piston drive stem provides a force imbalance to move the piston towards the warm end. | 10-02-2014 |
20140311166 | CRYOCOOLERS WITH ELECTRONIC CRYOSTAT FLOW CONTROLLERS AND RELATED SYSTEM AND METHOD - A system includes a cryocooler configured to cool an object, a sensor configured to measure a temperature of the object, and a controller configured to generate an actuator drive signal to control the cryocooler based on at least one temperature measurement from the sensor. The cryocooler includes a heat exchanger and a needle configured to control flow of coolant gas through the heat exchanger. The cryocooler also includes a motion rod configured to move the needle and an actuator assembly configured to move the motion rod to thereby move the needle. The actuator could include a motor and a gear head configured to rotate a lead screw and a lead screw nut located around the lead screw and configured to translate rotational motion of the lead screw into linear motion. The actuator could also include a piezoelectric actuator or a linear actuator. | 10-23-2014 |
20140311167 | ERICSSON CYCLE DEVICE IMPROVEMENTS - The present disclosure relates to improvements to thermodynamic devices that approximate the Ericsson cycle, Brayton cycle, or regenerated Brayton cycle. These cycles and various ways of implementing them are known in the art. They can operate as engines or refrigerators. The Ericsson cycle is attractive since it can theoretically operate at the Carnot efficiency, which is the maximum possible efficiency for a heat engine or refrigerator. | 10-23-2014 |
20140318155 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a compressor having a return end and a suction end that selectively connects to an expansion space, a housing having an assist space that communicates to the return end, a cylinder having one end connected to the housing and another end connected to the expansion space, a displacer that undergoes a reciprocating motion inside the cylinder, and tolerates flow of a working gas to and from the expansion space, and a drive shaft that is accommodated within the housing and drives the displacer. The drive shaft includes first and second parts having different cross sectional areas, sealed and supported by first and second seals, respectively. An end of the first part opposes the housing to form the assist space, and an end of the second part connects to the displacer. | 10-30-2014 |
20140325999 | ACTIVE DAMPING VIBRATION CONTROLLER FOR USE WITH CRYOCOOLERS - A cryocooler assembly including a cryocooler housing and a free-piston engine arranged within the housing, an absorber housing and a damper motor arranged within the absorber housing, and a controller housing rigidly coupled between the cryocooler and the active damper such that vibrations may pass through the controller. A controller mounted within the controller housing provides power to the cryocooler and monitors the phase and frequency of the power supplied to the cryocooler. The controller monitors the vibration of the cryocooler assembly and provides a damping signal to the active damper. The damping signal generated by the controller is based at least in part on the phase and frequency of the power supplied to the cryocooler and the monitored vibration of the cryocooler assembly. | 11-06-2014 |
20140331689 | Stirling engine regenerator - The invention disclosed a Stirling engine regenerator, including a cylindrical regenerator cover, one end of the regenerator cover is connected with a heater and the other end is connected with a cooler. The end of the regenerator which is near the heater is provided with the first metal wire mesh, the other end of the regenerator which is near the cooler is provided with the second metal wire mesh. The regenerator is located in the cavity between the first metal wire mesh and the second metal wire mesh. The carbon fiber body filled the whole cavity. Carbon fiber body has the characteristics of high temperature resistance, high thermal conductivity and corrosion resistance and using the filling type. The manufacturing costs are very low with long service life and the contact area between the air and the carbon fiber body is large. So the heat transfer efficiency is high. | 11-13-2014 |
20140338367 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes a compressor, an expansion space where a high-pressure working gas discharged from a discharge side of the compressor is caused to expand, and a valve. The valve includes a first member including a first channel connecting to the discharge side and a second member including a second channel connecting to the expansion space. The first and second members are configured to rotate relative to and in contact with each other to connect or disconnect the first and second channels. In a plane where the first and second members are in contact, a first distance that is a distance of closest approach between the first channel and a valve circumference defined by a circumference of one of the first and second members having a smaller diameter is greater than a second distance that is a distance of closest approach between the second channel and the valve circumference. | 11-20-2014 |
20140338368 | STIRLING-TYPE PULSE TUBE REFRIGERATOR AND FLOW SMOOTHER THEREOF - A Stirling-type pulse tube refrigerator includes: a compressor which pressurizes and depressurizes a gas; a regenerator which is supplied with the gas from the compressor or supplies the gas to the compressor through pressurization or depressurization of the compressor; a pulse tube which is supplied with the gas from the regenerator or supplies the gas to the regenerator; and a flow smoother which is disposed on at least one of a high temperature side and a low temperature side of the pulse tube. The flow smoother includes a plurality of meshes arranged to be laminated and a holding member which maintains gaps between the plurality of meshes. | 11-20-2014 |
20140338369 | Thermoacoustic Engine - Disclosed is a thermoacoustic engine having: resonance pipes including a working gas; motors; and a branch pipe, where each of the motors has a regenerator, a heater, and a cooler, a temperature gradient is given between both ends of the regenerator to generate self-excited oscillation of the working gas, a channel cross-sectional area of the resonance pipe that is coupled to the heater is expanded by a same amplification factor of a work flow based on the self-excited oscillation or by an amplification factor within a range of ±30% of the amplification factor of the work flow to a channel cross-sectional area of a resonance pipe that is coupled to the cooler, and a channel cross-sectional area of the regenerator is set by 4 to 36 times of the channel cross-sectional area of the resonance pipe that is coupled to the cooler. | 11-20-2014 |
20150013348 | SYSTEM, APPARATUS AND METHOD FOR PULSE TUBE CRYOCOOLER - A pulse tube cryocooler (PTC) includes an etched glass substrate bonded to a glass plate and defining one or multiple stages or layers. The PTC includes a plurality of channels etched into a surface of the substrate to define a heat exchanger, a pulse tube, a cold heat exchanger or cold head, a regenerator and an aftercooler. The bonded substrate and plate encloses the plurality of channels to form capillaries operable for conducting and distributing fluid. The pulse tube is disposed between the cold head and the heat exchanger and the regenerator is disposed between the cold head and the aftercooler. The heat exchanger is connected to a valve or inertance tube which, in turn, is connectable to a buffer tank or reservoir that contains fluid. The aftercooler is connectable to an external compressor operable for oscillating movement, which increases and decreases pressure and temperature within the PTC. | 01-15-2015 |
20150013349 | LOW-TEMPERATURE DEVICE FOR SEPARATING AND PURIFYING GAS BASED ON SMALL-SIZED LOW-TEMPERATURE REFRIGERATING MACHINE - A low-temperature device for separating and purifying gas based on a small-sized low-temperature refrigerating machine includes a primary, secondary and quaternary heat exchanger, at least one small-sized low-temperature refrigerating machine, and at least one liquid collecting tank. The small-sized low-temperature refrigerating machine includes a first cold head and a second cold head, the secondary heat exchanger is provided on the first cold head to form a primary cold head heat exchanger, the quaternary heat exchanger is provided on the second cold head to form a secondary cold head heat exchanger, a mixed gas outlet is connected to an inlet of the primary cold head heat exchanger. By using primary and secondary cold heads of the small-sized low-temperature refrigerating machine as cold sources, gases having different condensing temperature are liquefied and solidified separately, and two or more gases can be separated and purified at a lower cost. | 01-15-2015 |
20150027135 | SECONDARY PULSE TUBES AND REGENERATORS FOR COUPLING TO ROOM TEMPERATURE PHASE SHIFTERS IN MULTISTAGE PULSE TUBE CRYOCOOLERS - Pulse tube refrigeration or cooling systems are described which utilize a secondary regenerator or a secondary pulse tube. Use of such a secondary regenerator or pulse tube enables a commercially available pressure oscillator to be incorporated in the cooling system. The commercially available oscillator can be operated at room temperature or approximately so. | 01-29-2015 |
20150033765 | SYSTEM AND METHOD FOR STORAGE AND DELIVERY OF CRYOGENIC LIQUID AIR - An apparatus for storing liquid air (a cryogenic mixture of about 80% liquid nitrogen and about 20% liquid oxygen) in a stable condition within a storage vessel by providing a heat exchanger in fluid communication with vaporized liquid air within vessel condense the vaporized liquid air back to liquid form. This will result in condensing the nitrogen-rich vapor into the mass as a liquid, thereby reducing ullage pressure, cooling the mass, and ultimately precluding oxygen-enrichment through boil-off. A cryocooler may be mounted externally to the vessel and in fluid communication with an interior of the vessel to condense liquid air vaporized within the vessel. The system may be used to supply air to safe haven areas of a mine or building, or piped in through a building HVAC system and/or mounted on vehicle. | 02-05-2015 |
20150033766 | REFRIGERATOR - A pulse tube refrigerator has a pulse tube having a first end and a second end. A inertance tube connects the first end and a buffer tank. A pressure change generator is connected with the second end. The pressure change generator generates a pressure change of a working gas at the second end periodically. A first flow straightener provided at the first end. A second flow straightener provided at the second end. A degree to which the first flow straightener hinders the flow of the working gas is greater than a degree to which the second flow straightener hinders the flow of the working gas. | 02-05-2015 |
20150033767 | Cryocooler with Magnetic Reciprocating Piston - A cryocooler is described that can include a pressure wave generator, and a refrigeration device (for example, a coldhead), which can be used to liquefy a gas when the gas is exposed to a surface of the refrigeration device. The pressure wave generator can include one or more motors. Each motor can include a stator, and at least one electrical coil wound around a portion of the stator. The electrical coil can generate a reversing magnetic field when alternating electric current is passed through the electrical coil. The motor can further include a pressurized container that can be placed within the space enclosed by the stator, and a piston that can be placed inside the pressurized container. The stators can be placed external to the pressurized container. The piston is made by combining magnets that have opposite and transverse polarities, and are combined adjacently on a common reciprocating axis. | 02-05-2015 |
20150068221 | CRYOGENIC REFRIGERATOR - In a cryogenic refrigerator, a scotch yoke mechanism includes an eccentric rotating body and a yoke plate that reciprocates by rotation of the eccentric rotating body. A displacer is connected to a yoke plate so as to reciprocate together with the yoke plate. A cylinder houses a displacer, and an expansion space for refrigerant gas is formed in a space with the displacer. An airtight container is provided on a high-temperature side of the cylinder and includes a housing space housing a scotch yoke mechanism and receive the refrigerant gas discharged from the expansion space. The airtight container includes a supporting unit that supports a side portion of the yoke plate so as to restrict tilting of the yoke plate around a rotary shaft of the eccentric rotating body. | 03-12-2015 |
20150075188 | REGENERATIVE REFRIGERATOR, FIRST STAGE REGENERATOR, AND SECOND STAGE REGENERATOR - A regenerative refrigerator includes: a regenerator unit that precools a working gas; and an expander that cools the working gas by expanding the working gas precooled by the regenerator unit. The regenerator unit includes a zinc based regenerator member formed of zinc or an alloy containing zinc as a main component of the alloy. A first stage regenerator optionally includes a high temperature part including a first regenerator member and a low temperature part including a second regenerator member different from the first regenerator member. A second stage regenerator optionally includes a high temperature part including a second regenerator member and a low temperature part including a third regenerator member different from the second regenerator member. The second regenerator member optionally includes a zinc based regenerator member formed of zinc or an alloy containing zinc as a main component of the alloy. | 03-19-2015 |
20150128616 | Compressor for a Cooling Device and a Refrigeration Machine - A compressor device that periodically supplies compressed working gas to a cooling device loses less gas by not using a rotary valve. The compressor device includes a compressor chamber, a working gas connection, a working liquid connection, a pump, a compensation container and a membrane that is airtight and liquid-tight. The membrane divides the compressor chamber into a first volume containing a working gas and a second volume containing a working liquid. The working gas connection is coupled to the first volume, and the working liquid connection is coupled to the second volume. The pump periodically pumps the working liquid through the working liquid connection and into the second volume and as a result periodically compresses the working gas in the first volume. The membrane is constructed as a balloon or a bellows that surrounds the first volume. The compensation container contains working liquid and is connected to the pump. | 05-14-2015 |
20150143820 | CRYOSTAT - A cryostat ( | 05-28-2015 |
20150345834 | REFRIGERATION AND/OR LIQUEFACTION DEVICE, AND CORRESPONDING METHOD - Refrigeration device comprising a working circuit in a loop for the working gas and comprising, in series: a compression station, a cold box, a system for the exchange of heat between the cooled working gas and a point of use, a system for the additional pre-cooling of the working gas leaving the compression station comprising an auxiliary cryogenic fluid volume, the cold box comprising a first cooling stage for the working gas comprising a first and a second heat exchanger, these being connected both in series and in parallel to the working circuit at the outlet of the compression station, the first cooling stage also comprising a third heat exchanger selectively exchanging heat with the auxiliary fluid, characterized in that the third heat exchanger is connected both in series and in parallel to the first and to the second heat exchangers, the working circuit comprising a recuperation pipe fitted with at least one valve and which connects the outlet of the third heat exchanger to the second heat exchanger. | 12-03-2015 |
20150345860 | SYSTEM AND METHOD FOR RECOVERY AND RECYCLING COOLANT GAS AT ELEVATED PRESSURE - A system and a method for recovery and recycling of gases which are utilized in their liquid state as refrigerants in applications that require low temperatures, throughout various pressure ranges, from slightly above atmospheric pressures to pressures near the critical point for the particular gas. The system and method are based on closed-cycle cryocoolers and utilize the thermodynamic properties of the gas to achieve optimal liquefaction rates. | 12-03-2015 |
20150354861 | STIRLING-TYPE PULSE TUBE REFRIGERATOR - A Stirling-type pulse tube refrigerator includes: a regenerator that has a low temperature end and high temperature end; a pulse tube that is arranged coaxially with the regenerator, and that is connected to the regenerator so as to enable working gas to circulate therebetween; a low temperature heat exchanger that is disposed in the low temperature end of the regenerator, and that has a gas flow passage serving as a flow passage for the working gas; and a flow straightener that is disposed in an end portion, on a side close to the low temperature heat exchanger, out of end portions of the pulse tube. The gas flow passage and the flow straightener are spaced away from each other, and a length of a connecting passage connecting the gas flow passage and the flow straightener is equal to or shorter than 10% of a length of the pulse tube. | 12-10-2015 |
20150362221 | FREQUENCY-MATCHED CRYOCOOLER SCALING FOR LOW-COST, MINIMAL DISTURBANCE SPACE COOLING - Components within a cryocooler are scaled and/or configured for operation at a CMG operating frequency (e.g., 100 Hz) rather than at 30 to 70 Hz, matching the exported disturbances of control moment gyroscopes on the same platform and reducing line-of-sight jitter for electro-optic infrared focal plane array sensors. The smaller piston working volume and other reduced component sizes allow the cryocooler to be smaller and lighter than designs operating at lower frequencies. Combined with an advanced regenerator suitable for the higher frequency operation, the cryocooler has improved cooling efficiency over such lower frequency designs. | 12-17-2015 |
20160007773 | Cooling blanket with cooling capability | 01-14-2016 |
20160040913 | TEMPERATURE CONTROL OF MULTI-STAGE CRYOCOOLER WITH LOAD SHIFTING CAPABILITIES - A system includes a multi-stage cryocooler having multiple stages and a temperature control system configured to regulate temperatures of the multiple stages of the multi-stage cryocooler. The temperature control system includes an input interface configured to receive (i) temperature setpoints for the stages of the multi-stage cryocooler and (ii) temperature information corresponding to temperatures measured at the stages of the multi-stage cryocooler. The temperature control system also includes processing circuitry configured to determine temperature errors and calculate at least one of a compressor stroke error and a pressure-volume phase error. The temperature control system further includes at least one controller configured to adjust at least one of a compressor setting and a pressure-volume phase of the multi-stage cryocooler. | 02-11-2016 |
20160069593 | PULSE TUBE REFRIGERATOR - In a pulse tube refrigerator, a gas flow passage is connected to a high-temperature end of a low-temperature side pulse tube and a compressor, such that a working gas flows in the gas flow passage. The gas flow passage includes: a first flow passage connected to the high-temperature end of the low-temperature side pulse tube; a second flow passage connected to the compressor and having an outlet facing an outlet of the first flow passage; and a housing that gastightly accommodates the outlet of the first flow passage and the outlet of the second flow passage. The housing has a gastight space communicating with the outlet of the first flow passage and the outlet of the second flow passage, the gastight space located on a side of the low-temperature side pulse tube with respect to the outlet of the first flow passage. | 03-10-2016 |
20160076794 | MACHINE TOOL - A machine tool includes a thermoacoustic apparatus and a fluid supply apparatus, utilizes exhaust heat from a constituent apparatus of the machine tool to cool a heat exchanger included in the thermoacoustic apparatus due to a thermoacoustic effect. Thus, a cooling fluid is cooled which is used to cool a bearing and a machining point. | 03-17-2016 |
20160091245 | APPARATUS AND METHOD FOR PURIFYING GASES AND METHOD OF REGENERATING THE SAME - A method and device for purifying a process gas mixture, such as a cryogen gas, in which impurity components of the mixture are removed by de-sublimation via cryo-condensation. The gas mixture is cooled to a temperature well below the condensation temperature of the impurities, by direct exchange of the gas mixture with a cooling source disposed in a first region of the device. The de-sublimated or frozen impurities collect about the cooling region surfaces, and ultimately transferred to a portion of the device defining an impurities storage region. The output-purified gas is transferred from the impurities storage region, is optionally passed through a first micrometer sized filter, through a counter-flow heat exchanger, and ultimately up to an output port at room temperature. A method of purging the collected impurities and regenerating the device is also disclosed. | 03-31-2016 |
20160097567 | CRYOGENIC REFRIGERATOR - A cryogenic refrigerator includes : a axially extending cylinder; an axially reciprocating displacer provided inside the cylinder, at a gap between an inner circumferential surface of the cylinder and an outer circumferential surface of the displacer, the displacer shifting to create an expansion space between the displacer and a first axial end portion of the cylinder; a regenerator built in the displacer; and a sleeve disposed along the inner circumferential surface of the first axial end portion of the cylinder, encompassing the expansion space. A first passage for guiding the refrigerant gas from the regenerator to the gap is provided in the displacer, and a second passage for guiding the refrigerant gas from the gap to the expansion space is provided between the first axial end of the cylinder and the sleeve, and/or is provided between the outer surface and the inner surface of the sleeve. | 04-07-2016 |
20160123630 | MULTI-DEWAR COOLING SYSTEM - A cooling system includes a first dewar configured to house a first optical imaging device, a second dewar configured to house a second optical imaging device, and a Stirling cycle refrigerator. The Stirling cycle refrigerator can include a compressor, a first expander in fluid communication with the compressor and in thermal communication with the first dewar, and a second expander in fluid communication with the compressor and in thermal communication with the second dewar. | 05-05-2016 |
20160123631 | CRYOGENIC REFRIGERATOR - In a cryogenic refrigerator, a displacer defines an internal space, and circulates a working fluid in the internal space. A cylinder houses the displacer such as to enable it to reciprocate, and, at an interval from the bottom side of the displacer, forms an expansion space for the working fluid. A cooling stage is provided along an outer circumferential and bottom portion of the cylinder, in a location corresponding to the expansion space. A heat exchanger is arranged inside the expansion space and is thermally connected to the cooling stage. An end portion of the displacer on its expansion-space side has an opening that serves as an entry/exit port between the internal space and the expansion space for the working fluid. A working-fluid flow channel connects the internal space and the expansion space via the heat exchanger. | 05-05-2016 |
20160131399 | PULSE TUBE COOLER - There is disclosed a cold head for a pulse tube cooler, comprising: a regenerator having a first end connectable to a compressor; a pulse tube having a first end and a second end; a heat exchanger connected between a second end of the regenerator and the first end of the pulse tube; and a phase control device connected at the second end of the pulse tube for controlling the flow dynamics in the pulse tube to provide cooling at the heat exchanger, thereby maintaining a negative temperature gradient between the first and second ends of the regenerator, wherein: the pulse tube comprises a wall having a porous portion for allowing a working gas to enter or leave the pulse tube directly through the porous portion, the porous portion being nearer to being parallel than perpendicular to the temperature gradient between the first and second ends of the regenerator. | 05-12-2016 |
20160138522 | AUTOMATED, OSCILLATING DUAL-CHAMBERED HEAT PUMP, ELECTRICITY GENERATING, AND/OR WATER HEATING METHOD EMPLOYING SUCH - Heat pump configurations that provide continuous heat transfer capabilities without any need for electricity. The overall system includes a rotatable hourglass structure situated within a sphere or ovoid container with internal tracks aligned with wheels on the hourglass. With a heat collection component situated on the underside of the container, the rotatable hourglass, being constructed of suitable heat transfer materials, absorb the collected heat in the lower portion of the container, thereby causing the air present therein to expand, forcing a plunger upward from one hourglass chamber to the other. The plunger effectuates operation of a magnetic switch to release the hourglass to rotate and then oscillate from one position to another until the heat collection operation discontinues. With a coolant introduced within the heated chamber (and drawn through pressure differential), heat can be transferred thereto. The heated coolant is then transferred to a reservoir for future utilization. | 05-19-2016 |
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