Class / Patent application number | Description | Number of patent applications / Date published |
060653000 | Including superheating, desuperheating, or reheating | 65 |
20080302102 | Steam Temperature Control in a Boiler System Using Reheater Variables - A technique of controlling a boiler system such as that used in a power generation plant includes using manipulated variables associated with or control inputs to a reheater section of the boiler system to control the operation of the furnace, and in particular to control the fuel/air mixture provided to the furnace or the fuel to feedwater ratio used in the furnace or boiler. In the case of a once-through boiler type of boiler system, using the burner tilt position, damper position or reheater spray amount to control the fuel/air mixture or the fuel to feedwater flow ratio of the system provides better unit operational efficiency. | 12-11-2008 |
20090025387 | PROCESS AND PLANT FOR POWER GENERATION - The present invention provides process and plant for power generation comprising: providing a steam generator; first, second and third steam turbines; a reheater; a gas turbine; and at least one heat exchanger; supplying a first stream comprising steam from the steam generator to the first steam turbine to generate power in the first steam turbine; recovering from the first steam turbine a recovered stream comprising steam and supplying at least a part of the recovered stream to the reheater; supplying a second stream comprising steam from the steam generator to a first zone of the heat exchanger and heating the second stream therein by supplying at least one hot exhaust gas from the gas turbine to the first zone of the heat exchanger; supplying the heated second stream to the second steam turbine to generate power therein; supplying a third stream comprising steam from the steam generator to the reheater to heat the recovered stream from the first steam turbine; recovering from the reheater a heated recovered stream from the first turbine; and supplying at least part of the heated recovered stream from the first turbine to the third steam turbine to generate power therein. | 01-29-2009 |
20100050637 | CARBON-DIOXIDE-CAPTURE-TYPE STEAM POWER GENERATION SYSTEM - A carbon-dioxide-capture-type steam power generation system | 03-04-2010 |
20100089059 | Hybrid Power Facilities - A hybrid power plant is disclosed wherein a first power plant produces secondary steam of a first, relatively low temperature using a renewable source of energy such as geothermal or solar. The steam from the renewable source plant is passed through a fossil fuel power plant that has an operating temperature higher than that of the first temperature which results in superheating the first temperature steam to the higher temperature in the fossil fuel power plant. Higher efficiencies and reductions in emissions are obtained. | 04-15-2010 |
20100089060 | HYBRID POWER FACILITIES - A hybrid power plant that combines a variety of renewable heat sources with a fossil fuel furnace system. Saturated steam generated by the renewable sources is routed through the fossil fuel fired furnace where superheat is added. The renewable sources would include geothermal, thermal solar, and biomass energy sources. Reductions in emissions per unit of power and cost per unit of power are obtained. | 04-15-2010 |
20100101227 | POWER SYSTEMS AND METHODS FOR HIGH OR MEDIUM INITIAL TEMPERATURE HEAT SOURCES IN MEDIUM AND SMALL SCALE POWER PLANTS - Power generation systems and methods are disclosed for use with medium to high temperature heat source stream, gaseous or liquid, where the systems and methods permit efficient energy extraction for medium and small scale power plants. | 04-29-2010 |
20100132360 | Steam generation plant and method for operation and retrofitting of a steam generation plant - The invention relates to a steam generation plant, comprising a steam generator ( | 06-03-2010 |
20100146972 | Waste Heat Power Generation System of Cement Calcination Plant - In a cement burning plant waste heat power generation system, an AQC boiler comprises an economizer, an evaporator and a superheater, and a PH boiler comprises a first evaporator and a superheater. A part of hot water heated by the economizer of the AQC boiler is fed through a flasher to the low pressure stage of a stream turbine, another part is superheated by the evaporator and the superheater of the AQC boiler, and further one part is superheated by the evaporator and the superheater of the PH boiler and these high pressure steams are fed to the high pressure stage of the stream turbine. The PH boiler is provided with a second evaporator on the outlet side of PH waste gas in addition to the evaporator and the superheater, and return hot water of the flasher is introduced into the second evaporator through a steam drum. Hot water heated by the second evaporator is introduced into the steam drum and its steam is fed to the low pressure stage of the stream turbine. | 06-17-2010 |
20100146973 | POWER SYSTEMS AND METHODS FOR HIGH OR MEDIUM INITIAL TEMPERATURE HEAT SOURCES IN MEDIUM AND SMALL SCALE POWER PLANTS - Power generation systems and methods are disclosed for use with medium to high temperature heat source stream, gaseous or liquid, where the systems and methods permit efficient energy extraction for medium and small scale power plants. | 06-17-2010 |
20100170247 | Heat Integration in Coal Gasification and Methanation Reaction Process - A combined Gasification, methanation and power island steam turbine system. The system includes a gasification portion, the methanation portion and a steam turbine portion. The Gasification portion includes the new heat recovery design and associated controls for obtaining a desired steam to dry gas ration of 1.1-2.2. The methanation portion includes first, second and third methanation reactors and associated heat recovery integrated with a high-pressure, low-pressure superheater, and HP economizers. The power Island steam turbine includes a High pressure, Intermediate pressure, low-pressure steam turbine having an input coupled to an output of the superheaters in Methanation process. | 07-08-2010 |
20100186409 | RANKINE CYCLE WITH MULTIPLE CONFIGURATION OF VORTEX - A method and system for improving the efficiency of a Rankine cycle. The system comprises an accumulator that stores a working fluid, a feed pump that pumps the working fluid from the accumulator into a boiler for heating the working fluid to form a dry saturated vapor. The system includes a turbine that expands the dry saturated vapor for generating power and condensing the dry saturated vapor into a volume of wet vapor, at least one vortex tube separating the wet vapor into a higher temperature component (T | 07-29-2010 |
20100212320 | METHOD FOR OPERATING A STEAM TURBINE POWER PLANT AND ALSO DEVICE FOR GENERATING STEAM - The invention refers to a method for operating a steam turbine power plant, and also a device for generating steam for the purpose of power generation. | 08-26-2010 |
20100236240 | Systems and Methods for Pre-Warming a Heat Recovery Steam Generator and Associated Steam Lines - Embodiments of the invention can provide systems and methods for pre-warming a heat recovery steam generator and associated steam lines. According to one embodiment, a method for pre-warming a heat recovery steam generator can be provided. The method can include providing heating steam from a steam source. The heating steam is directed from the steam source to a superheater so that at least a portion of the superheater can be warmed. Once exiting the superheater, the heating steam can be further directed from the superheater to at least one bypass line and maintained in the bypass line until the bypass line attains a predefined temperature or pressure. Furthermore, the method can include directing, after the bypass line attains a predefined temperature or pressure, at least a portion of the heating steam from the bypass line to a reheater so that the reheater can be warmed. | 09-23-2010 |
20100236241 | SINGLE LOOP ATTEMPERATION CONTROL - A heat recovery steam generation system is provided. The heat recovery steam generation system includes at least one superheater in a steam path for receiving a steam flow and configured to produce a superheated steam flow. The system also includes an inter-stage attemperator for injecting an attemperation fluid into the steam path. The system further includes a control valve coupled to the inter-stage attemperator. The control valve is configured to control flow of attemperation fluid to the inter stage attemperator. The system also includes a controller coupled to the control valve and the inter-stage attemperator. The controller further includes a feedforward controller and a trimming feedback controller. The feedforward controller is configured to determine a desired amount of flow of the attemperation fluid and the trimming feedback controller is configured to compensate for inaccuracies in the determined amount of flow of the attemperation fluid to determine a net desired amount of flow of attemperation fluid through the control valve into an inlet of the inter-stage attemperator based upon an outlet temperature of steam from the superheater. The controller also determines a control valve demand based upon the flow to valve characteristics. The controller further manipulates the control valve of the inter-stage attemperator, and injects the desired amount of attemeration flow via the inter-stage attemperator to perform attemperation upstream of an inlet into the superheater. | 09-23-2010 |
20100281864 | ORGANIC RANKINE CYCLE SYSTEM AND METHOD - An ORC system configured to limit temperature of a working fluid below a threshold temperature is provided. The ORC system includes a heat source configured to provide waste heat fluid. The ORC system also includes a heat exchanger coupled to the heat source, wherein the heat exchanger includes multiple external or internal enhancement features. The external enhancement features are configured to reduce a first heat transfer coefficient between the working fluid and the waste heat fluid from the heat source, external to the heat exchanger. The internal enhancement features are configured to increase a second heat transfer coefficient between the working fluid and the waste heat fluid from a heat source, internal to the heat exchanger. | 11-11-2010 |
20100307154 | CLOSED THERMODYNAMIC SYSTEM FOR PRODUCING ELECTRIC POWER - A closed thermodynamic system for producing electricity, including a water pump ( | 12-09-2010 |
20110056201 | METHOD AND APPARATUS FOR CONTROLLING MOISTURE SEPARATOR REHEATERS - A system and a method are provided that may be used to control the temperature of steam being reheated by a moisture separator reheater (MSR). The temperature of a steam being reheated by a MSR may be sensed, and controller embodiments may use the sensed temperature to control the transfer of heat from various MSR components into the reheated steam. By using such control embodiments, the MSR may provide optimally heated steam to other power plant components, thus increasing the performance, efficiency, and safety of a power plant. | 03-10-2011 |
20110061388 | DIRECT EVAPORATOR APPARATUS AND ENERGY RECOVERY SYSTEM - In one aspect of the present invention provides a direct evaporator apparatus for use in an organic Rankine cycle energy recovery system, comprising: (a) a housing comprising a heat source gas inlet, and a heat source gas outlet, said housing defining a heat source gas flow path from said inlet to said outlet; and (b) a heat exchange tube disposed entirely within said heat source flow path, said heat exchange tube being configured to accommodate an organic Rankine cycle working fluid, said heat exchange tube comprising a working fluid inlet and a working fluid outlet, said heat exchange tube defining three zones, a first zone adjacent to said heat source gas outlet, a second zone adjacent to said heat source gas inlet, and a third zone disposed between said first zone and said second zone, said working fluid inlet being in direct fluid communication with said first zone, and said working fluid outlet being in direct fluid communication with said third zone; wherein said first zone is not in direct fluid communication with said third zone. An organic Rankine cycle energy recovery system and a method of energy recovery are also provided. | 03-17-2011 |
20110131995 | STEAM-GENERATOR TEMPERATURE CONTROL AND OPTIMIZATION - A control method for boiler outlet temperatures includes predictive control of SH and RH desuperheater systems. The control method also includes control and optimization of steam generation conditions, for a boiler system, such as burner tilt and intensity, flue-gas recirculation, boiler fouling, and other conditions for the boiler. The control method assures a proportional-valve control action in the desuperheater system, that affects the boiler system. | 06-09-2011 |
20110146278 | POWER GENERATION PLANT AND METHOD OF GENERATING ELECTRIC ENERGY - A power generation plant and a method of generating electric energy from recovered heat during an industrial process that uses steam as a means of transferring energy. The method comprises: a) generating a first saturated steam in a first heat exchanger heated by a first source of recovered heat; b) feeding the first saturated steam into a first steam turbine generator, where the first steam turbine generator outputs exhaust steam; c) removing moisture from the exhaust steam with a moisture separator; d) superheating the moisture reduced exhaust steam from step c) in a main heat exchanger with a heat source; and e) feeding the superheated exhaust steam into a second steam turbine generator. The power generation plant comprises a first source of saturated steam, a first steam turbine generator, a moisture separator, a second source of saturated steam, a heat exchanger and a second steam turbine generator. | 06-23-2011 |
20110203277 | METHOD AND APPARATUS FOR PRODUCING LIQUID BIOFUEL FROM SOLID BIOMASS - The invention relates to producing liquid hydro carbonaceous product ( | 08-25-2011 |
20110214427 | PROCESS FOR REDUCING COAL CONSUMPTION IN COAL FIRED POWER PLANT WITH STEAM PIPING DRYING - The present invention relates to a process for reducing coal consumption in coal fired power plant with steam-piping drying, namely a steam-piping drying system is provided between a coal grinding mill and a coal powder bunker as well as a weighing belt of the prior coal fired boiler generating set, and superheated steam which have done partial work is extracted from an steam turbine and used as a drying medium, moisture contained in the coal powder is evaporated with sensible heat and latent heat of the superheated steam, water resulted from the condensation of the superheated steam is fed into a deaerator of the steam turbine via a condensate pump for recirculation. The present invention has advantages of reducing coal consumption and saving coal, recovering residual heat, reducing emission of carbon dioxide and adopting to the national industrial policy on energy saving and emission reduction. | 09-08-2011 |
20110232284 | INTEGRATED PROCESS AND RELATED SYSTEM FOR OBTAINING ENERGY FROM WASTE WITH LOW INVESTMENTS AND HIGH THERMOELECTRIC YIELDS - A process is described for obtaining energy from waste, comprising the following phases: a) bio-drying of municipal solid waste (MSW) to transform it into refuse-derived fuel (RDF), a dry, homogeneous material with piece size of around 20-30 cm, known by the name of RDF; h) compacting of the material obtained from phase a) into bales or BIOCUBr and storage of the BIOCUBI® in bioreactors; c) activation by wetting with water of the bioreactors to produce biogas by anaerobic digestion; d) combustion at the start of the material obtained from phase a) (RDF) and subsequently of the residue already digested in the bioreactors, and therefore not biodegradable, in a waste combustor provided with a system of purification of combustion gasses and production of superheated steam at approximately 400° C. and pressure of around 70 bar; e) combustion of the purified biogas in a conventional boiler provided with re-superheaters for raising the temperature of the steam produced by the waste combustor by approximately 100° C.; f) use of the steam produced in this way in a turbine coupled with an alternator for the production of electrical energy. The invention also relates to a system for the implementation of this method. | 09-29-2011 |
20110232285 | METHOD FOR OPERATING A STEAM TURBINE WITH AN IMPULSE ROTOR AND A STEAM TURBINE - A steam turbine ( | 09-29-2011 |
20110259011 | HEAT CONVERSION SYSTEM SIMULTANEOUSLY UTILIZING TWO SEPARATE HEAT SOURCE STREAM AND METHOD FOR MAKING AND USING SAME - A system and method are disclosed for converting heat into a usable form of energy, where the system and method are designed to utilize at least two separate heat sources simultaneously, where one heat source stream has a higher initial temperature and a second heat source stream has a lower initial temperature, which is transferred to and a multi-component working fluid from which thermal energy is extracted. | 10-27-2011 |
20110265477 | THERMAL INTEGRATION OF A CARBON DIOXIDE CAPTURE AND COMPRESSION UNIT WITH A STEAM OR COMBINED CYCLE PLANT - A power plant system including a fossil fuel fired power plant ( | 11-03-2011 |
20110308252 | TURBINE INLET CONDITION CONTROLLED ORGANIC RANKINE CYCLE - A pressure sensor measures an organic Rankine cycle (ORC) working fluid pressure in front of a radial inflow turbine, while a temperature sensor measures an ORC working fluid temperature in front of the radial inflow turbine. A controller responsive to algorithmic software determines a superheated temperature of the working fluid in front of the radial inflow turbine based on the measured working fluid pressure and the measured working fluid temperature. The controller then manipulates the speed of a working fluid pump, the pitch of turbine variable inlet guide vanes when present, and combinations thereof, in response to the determined superheated temperature to maintain the superheated temperature of the ORC working fluid in front of the radial inflow turbine close to a predefined set point. The superheated temperature can thus be maintained in the absence of sensors other than pressure and temperature sensors. | 12-22-2011 |
20120000202 | METHOD FOR GENERATING ENERGY BY MEANS OF THERMAL CYCLES WITH HIGH PRESSURE AND MODERATE TEMPERATURE STEAM - The invention relates to a method for generating energy by means of thermal cycles with high pressure and moderate temperature steam, which allows improving the energy and operational efficiency of the conversion of heat energy into mechanical or electrical energy by means of thermal cycles in which the temperature of the steam is limited to moderate values in its generation, comprising the following steps:
| 01-05-2012 |
20120036852 | DYNAMIC TUNING OF DYNAMIC MATRIX CONTROL OF STEAM TEMPERATURE - A technique of controlling a steam generating boiler system includes dynamically tuning a rate of change of a disturbance variable (DV) to control operation of a portion of the boiler system, and in particular, to control a temperature of output steam to a turbine. The rate of change of the DV is dynamically tuned based on a magnitude of an error or difference between an actual and a desired level of an output parameter, e.g., output steam temperature. In an embodiment, as the magnitude of the error increases, the rate of change of the DV is increased according to a function f(x). A dynamic matrix control block uses the dynamically-tuned rate of change of the DV, a current output parameter level, and an output parameter setpoint as inputs to generate a control signal to control a field device that, at least in part, affects the output parameter level. | 02-16-2012 |
20120085097 | UTILIZATION OF PROCESS HEAT BY-PRODUCT - Heat recovery systems and methods for producing electrical and/or mechanical power from a process heat by-product are provided. Sources of process heat by-product include hot flue gas streams, high temperature reactors, steam generators, gas turbines, diesel generators, and process columns. Heat recovery systems and methods include a process heat by-product stream for directly heating a working fluid of an organic Rankine cycle. The organic Rankine cycle includes a heat exchanger, a turbine-generator system for producing power, a condenser heat exchanger, and a pump for recirculating the working fluid to the heat exchanger. | 04-12-2012 |
20120096863 | CARBON DIOXIDE RECOVERY METHOD AND CARBON-DIOXIDE-RECOVERY-TYPE STEAM POWER GENERATION SYSTEM - According to one embodiment, a carbon-dioxide-recovery-type steam power generation system comprises a boiler that generates steam and an exhaust gas, an absorption tower that allows carbon dioxide contained in the exhaust gas to be absorbed in an absorption liquid, a regeneration tower that discharges a carbon dioxide gas from the absorption liquid supplied from the absorption tower, a reboiler that heats the absorption liquid of the regeneration tower, a turbine that is rotationally driven by the steam, a first condenser, a second condenser, and a desuperheater. The first condenser generates condensate by cooling steam exhausted from the turbine. The second condenser condenses the carbon dioxide gas while using a part of the condensate as cooling water, and generates hot water. | 04-26-2012 |
20120151924 | METHOD AND SYSTEM FOR GENERATING HIGH PRESSURE STEAM - A method and system of generating high pressure steam from a low pressure low energy steam is described and includes providing providing a low pressure steam source; dividing the source into at least two streams. A first stream driving a turbine/expander coupled to a steam compressor of a steam generator. The steam compressor is fed by the second stream of the low pressure steam source, and the mass flow rate of the first stream is sufficient to raise the pressure of the second stream to a desired pressure. At steady state operating conditions the first and the second stream respectively acts as the driving force for the steam compressor and the inlet feed to the steam compressor generating the high pressure steam. In another embodiment the steam driven generator includes a thermocompressor and may include an organic thermal fluid Rankine cycle. | 06-21-2012 |
20120198845 | Steam Seal Dump Re-Entry System - A steam seal dump re-entry system delivers steam dump flow to an LP steam turbine. The system includes a steam seal header receiving steam leaking from turbine end seal packings, and a desuperheater receiving and cooling the steam from the steam seal header. The desuperheater outputs cooled steam. A temperature sensor is disposed downstream of the desuperheater and detects a temperature of the cooled steam. A flow control circuit communicating with the temperature sensor selectively delivers the cooled steam to at least one of the condenser and to the LP steam turbine depending on the temperature of the cooled steam. | 08-09-2012 |
20120198846 | AIR COOLING SYSTEM AND METHOD FOR A HEAT RECOVERY STEAM GENERATOR INLET - The air cooling system and method for a heat recovery steam generator (HRSG) inlet provides a combined cycle power plant utilizing a powerful fan coupled to ductwork connected to pipes that enter the HRSG inlet duct coupled to an exhaust duct of a Combustion Turbine (CT) for lowering the temperature of the CT exhaust gas provided to the heat recovery steam generator by the CT. The cool air injection system is utilized during low load operation or startup of the CT to ensure that spray water from an inter-stage desuperheater in an HRSG is fully evaporated prior to entering the downstream superheater or reheater. A feedback system includes temperature elements measuring the mix temperature that regulates the cooling air injection rate into the HRSG inlet. | 08-09-2012 |
20120210714 | Hydrogen based combined steam cycle apparatus - A hydrogen based combined steam cycle apparatus having an irreversible isobaric Rankine steam cycle portion, an irreversible isobaric Carnot steam cycle portion and a reversible isobaric Rankine steam cycle portion, all three portions of which operate simultaneously. The apparatus includes a source of liquid oxygen, a source of liquid hydrogen, a combustion chamber, a first pump and at second pump. At the first pump, the liquid oxygen and liquid hydrogen from their respective sources are pumped to the combustion chamber where they are burned to produce heat, radiant energy and working fluid masses. A pressure vessel surrounds the combustion chamber. A superheater receives working fluid mass in the form of plasma from the combustion chamber and cools the plasma. A steam turbine receives working fluid mass from the superheater and outputs work. A condenser receives working fluid from the steam turbine and outputs liquid water. Liquid water outputted from the condenser is sent through the second pump to the pressure vessel for use in cooling the combustion chamber or back to the superheater. A plurality of valves and a computer are used to control the flow of working fluid to the superheater and to and from the pressure vessel, one of the valves controlling the flow of working fluid from the second pump to the superheater in the irreversible Rankine steam cycle portion of the combined cycle and the other two valves controlling the flow of working fluid mass into and out of the pressure vessel in the irreversible isobaric Carnot steam cycle portion of the combined cycle and the reversible isobaric Rankine steam cycle portion of the combined cycle. | 08-23-2012 |
20120216539 | MODULE-BASED OXY-FUEL BOILER - A boiler system for producing steam from water includes a plurality of serially arranged oxy fuel boilers. Each boiler has an inlet in flow communication with a plurality of tubes. The tubes of each boiler form at least one water wall. Each of the boilers is configured to substantially prevent the introduction of air. Each boiler includes an oxy fuel combustion system including an oxygen supply for supplying oxygen having a purity of greater than 21 percent, a carbon based fuel supply for supplying a carbon based fuel and at least one oxy-fuel burner system for feeding the oxygen and the carbon based fuel into its respective boiler in a near stoichiometric proportion. The oxy fuel system is configured to limit an excess of either the oxygen or the carbon based fuel to a predetermined tolerance. The boiler tubes of each boiler are configured for direct, radiant energy exposure for energy transfer. Each of the boilers is independent of each of the other boilers. | 08-30-2012 |
20120216540 | COAL POWER PLANT HAVING AN ASSOCIATED CO2 SCRUBBING STATION AND HEAT RECOVERY - The invention relates to a method for recovering heat by joining a plurality of heat flows of a fossil-fired, in particular carbon-fired, power plant ( | 08-30-2012 |
20120227405 | CYCLONE SEPARATOR FOR THE PHASE SEPARATION OF A MULTIPHASE FLUID STREAM, STEAM TURBINE SYSTEM HAVING A CYCLONE SEPARATOR AND ASSOCIATED OPERATING METHOD - A cyclone separator for phase separation of a fluid stream has a rotationally symmetrical housing with a hollow chamber. Feed lines feed the fluid stream into the housing substantially tangentially. At least one discharge line conducts the separated gaseous fraction. In order to ensure uniform and homogeneous flow distribution of the steam to be heated as it enters the heating phase, the hollow chamber, when viewed in the radial direction from the mid-axis, has an outflow chamber with a circular cross section and, in radial sequence, a heating chamber, an intermediate chamber, a dryer chamber and an inflow chamber. The inflow chamber is outwardly delimited by the housing. The heating chamber contains heating elements for heating the gaseous fraction. At least one fine separator and at least one associated condensate-collecting trough are arranged in the dryer chamber. The condensate-collecting trough is connected to a condensate discharge pipe in the intermediate chamber for conducting the condensate forming in the fine separator out of the hollow chamber. | 09-13-2012 |
20120240578 | Hot Charge Dual Drive Engine with Steam Assist - A steam assisted, optional dual drive internal combustion engine with cylinders containing a piston, where the region above a piston is a combustion chamber and a region below a piston is a water injection chamber. The engine generally has a single intake/exhaust valve in the combustion chamber, and an exhaust valve in said water injection chamber. A water injector in the water injection chamber injects water during a compression stroke of the piston which immediately vaporizes to become steam providing an upward second power stroke per cycle. The engine can have an EGR chamber with a regulator to admit a measured exhaust gas recirculation into the combustion chamber on the intake stroke, and it can utilize intake-exhaust heat exchange to pre-heat the intake mixture. In an alternate embodiment, the engine can use different cylinders to separately drive the front and rear wheels of a vehicle so that part of the engine can be shut off when not needed. | 09-27-2012 |
20120240579 | CARBON-DIOXIDE-RECOVERY-TYPE THERMAL POWER GENERATION SYSTEM AND METHOD OF OPERATING THE SAME - According to one embodiment, a carbon-dioxide-recovery-type thermal power generation system includes an absorption column allows carbon dioxide contained in exhaust gas from a boiler to be absorbed in an absorption liquid, a regeneration column that discharges a carbon dioxide gas from the absorption liquid supplied from the absorption column, a reboiler that heats the absorption liquid discharged from the regeneration column and supplies steam generated, to the regeneration column, a condenser that generates condensate by cooling the steam exhausted from a turbine, a heater that heats the condensate, a water supply pump that supplies the condensate to the boiler, a line through the steam extracted from the turbine is supplied to the reboiler and the heater, and a steam flow rate adjusting unit. The steam flow rate adjusting unit maintains an amount of steam, which is extracted from the turbine through the line, to be constant. | 09-27-2012 |
20120255303 | Feedwater Heater Control System for Improved Rankine Cycle Power Plant Efficiency - A method comprises heating a feedwater stream in a feedwater heater, boiling the feedwater stream in a boiler to produce a steam stream, superheating the steam stream in the boiler to produce a superheated steam stream, producing power using the superheated steam stream to produce an outlet steam stream, using a first portion of the outlet steam stream to provide heat for the heating step, and modulating the flow of the first portion of the outlet steam stream below a full flow to allow the superheated steam stream to meet a superheated steam set point. | 10-11-2012 |
20120291435 | DOUBLE PINCH CRITERION FOR OPTIMIZATION OF REGENERATIVE RANKINE CYCLES - Systems and methods are disclosed herein that generally involve a double pinch criterion for optimization of regenerative Rankine cycles. In some embodiments, operating variables such as bleed extraction pressure and bleed flow rate are selected such that a double pinch is obtained in a feedwater heater, thereby improving the efficiency of the Rankine cycle. In particular, a first pinch point is obtained at the onset of condensation of the bleed and a second pinch point is obtained at the exit of the bleed from the feedwater heater. The minimal approach temperature at the first pinch point can be approximately equal to the minimal approach temperature at the second pinch point. Systems that employ regenerative Rankine cycles, methods of operating such systems, and methods of optimizing the operation of such systems are disclosed herein in connection with the double pinch criterion. | 11-22-2012 |
20130160449 | CASCADED ORGANIC RANKINE CYCLE SYSTEM - A cascaded Organic Rankine Cycle (ORC) system includes a bottoming cycle working fluid is first evaporated and then superheated and a topping cycle working fluid is first desuperheated and then condensed such that a percentage of total heat transfer from the topping cycle fluid that occurs during a saturated condensation is equal to or less than a percentage of total heat transfer to the bottoming cycle fluid that occurs during a saturated evaporation. | 06-27-2013 |
20130186091 | METHOD FOR CONTROLLING A SHORT-TERM INCREASE IN POWER OF A STEAM TURBINE - A method is provided for controlling a short-term increase in power in a steam turbine including a fossil-fired steam generator having a flow path through which a flow medium flows. The method involves tapping off the flow medium from the flow path in a pressure stage and injecting it into the flow path on the flow-medium side upstream of a super heater heating surface of the respective pressure stage. A first characteristic value is used as a controlled variable for the amount of injected flow medium. The first characteristic value is characteristic of the deviation between the outlet temperature of a final super heater heating surface of the respective pressure stage on the flow medium side and a predetermined nominal temperature value. The nominal temperature value is reduced and, for the duration of the reduction in the nominal temperature value, the characteristic value is temporarily increased over-proportionately to the deviation. | 07-25-2013 |
20130205782 | Feedwater Storage and Recirculation System and Method - A feed water storage and recirculation system for a steam turbine power plant having a post-combustion carbon capture plant which uses steam from the power plant as a heat source for regeneration of absorbent and returns condensate from the post-combustion carbon capture plant to the steam turbine power plant, and a plant with post-combustion carbon capture are described, comprising: a feed water storage tank; a deaerator integral to or fluidly in series with the feed water storage tank; a steam extraction conduit to convey water/steam to the feed water storage tank and deaerator after extraction from a turbine of a steam turbine power plant; a feed water supply conduit to supply feed water from the feed water storage tank to a boiler of a steam turbine power plant; a low pressure condensate conduit comprising at least a PCC condensate conduit to return condensate from an associated post-combustion carbon capture plant to a location upstream of the deaerator, together with the condensate returning through the low pressure feed water heaters from the condenser; a flow restrictor provided in the steam extraction conduit between the turbine and the feed water storage tank and deaerator. | 08-15-2013 |
20130227949 | Energy Changer - A self-contained energy converter, suitable for powering a vehicle for example, includes an assembly for gasification of a liquid fuel to produce a combustible gas. A number of burners are provided burn the combustible gas in order to heat a heat exchanger for heating water from a tank to produce wet steam. A superheated steam generator is provided in communication with the heat exchanger and includes a number of heating assemblies arranged to heat cylindrical surfaces for converting the wet steam into a superheated steam. Nozzles are provided to direct the superheated steam to a turbine to produce mechanical motion. | 09-05-2013 |
20130305722 | METHOD OF OPERATING A STEAM POWER PLANT AT LOW LOAD - A method for operating a steam power plant at low load is suggested comprising the extraction of live steam LS before the last superheater SH | 11-21-2013 |
20130312416 | STEAM RANKINE PLANT - The invention relates to a steam Rankine cycle plant and a method for operating thereof. The plant comprises a higher-pressure steam turbine with an outlet and a reheater fluidly connected to the higher-pressure steam turbine. In addition, the plant has a lower-pressure steam turbine with an inlet that is fluidly connected to the reheater. The plant also has a bypass that is fluidly connecting the outlet and the inlet so as to bypass the reheater. | 11-28-2013 |
20130333386 | METHOD AND APPARATUS FOR CONTROLLING MOISTURE SEPARATOR REHEATER - A system and a method are provided that may be used to control the temperature of steam being reheated by a moisture separator reheater (MSR). One embodiment provides a system including a steam turbine, a moisture separator reheater coupled to the steam turbine, and a controller programmed to control a temperature of steam leaving the moisture separator reheater based at least in part on sensor feedback. The controller is programmed to facilitate substantially smooth linear temperature ramping. | 12-19-2013 |
20140013748 | METHOD FOR OPERATING A SOLAR INSTALLATION - Method for operating a solar installation. The solar installation includes a solar field with direct evaporation accompanied by the generation of superheated live steam, a turbine for expanding the live steam, and a generator driven by the turbine for generating electrical energy. At least one valve is associated with the turbine by which the amount of live steam fed to the turbine is adjusted. The valve, or each valve, through which the amount of live steam fed to the turbine is adjusted such that an actual value of a live steam pressure occurring upstream of the turbine follows a reference value determined depending on a live steam temperature of the live steam upstream of the turbine. | 01-16-2014 |
20140033712 | M-TYPE PULVERIZED COAL BOILER SUITABLE FOR ULTRAHIGH STEAM TEMPERATURE - The disclosure provides an M-type pulverized coal boiler suitable for ultrahigh steam temperature. The pulverized coal boiler comprises a hearth of which the bottom is provided with a slag hole and a tail downward flue of which the lower part is provided with a flue gas outlet. The pulverized coal boiler further comprises a middle flue communicated between the hearth and the tail downward flue, wherein the middle flue comprises an upward flue and a hearth outlet downward flue of which the bottoms are mutually communicated and the upper ends are respectively communicated with the upper end of the hearth and the upper end of the tail downward flue to form a U-shaped circulation channel. In the pulverized coal boiler provided by the disclosure, the middle flue which extends downwards and can make flue gas flow along the U-shaped circulation channel is arranged between the outlet of the hearth and the tail downward flue, so that high-temperature flue gas from the hearth can be introduced into a position with low elevation through the downward flue, and final-stage convection heating surfaces (such as a high-temperature superheater and a high-temperature reheater) can be arranged at positions with low height, and the length of ultrahigh-temperature steam pipelines between the high-temperature superheater and a steam turbine, and between the high-temperature reheater and the steam turbine can be greatly reduced. Therefore, the manufacturing cost of a boiler unit is obviously reduced. | 02-06-2014 |
20140041386 | COOLING TOWER APPARATUS AND METHOD WITH WASTE HEAT UTILIZATION - A cooling tower system is disclosed. The cooling tower system includes a first heat exchanger that receives a process fluid from a first fluid circuit, and receives a working fluid from a second fluid circuit, thereby effecting thermal communication between the first fluid circuit and the second fluid circuit. The first fluid circuit includes a heat source disposed upstream of the first heat exchanger, and a cooling tower unit configured to transfer heat from the process fluid to a flow of ambient air. The second fluid circuit includes a waste heat expansion engine disposed downstream of the first heat exchanger in a direction of working fluid flow. The waste heat expansion engine is configured to extract power from the working fluid and transfer at least a portion of the power extracted to a component of the cooling tower unit. | 02-13-2014 |
20140216034 | Thermal Power Generation System and Method for Generating Thermal Electric Power - A thermal power generation system includes a combustor burning oxygen and fuel with supercritical CO | 08-07-2014 |
20140238021 | GENERATOR - A generator comprising: a heat differential module with a first, high temperature source configured for providing a work medium at high temperature, a second, low temperature source configured for providing a work medium at low temperature, and a heat mechanism in fluid communication with the first and second sources, configured for maintaining a temperature difference therebetween by at least one of: providing heat to the work medium at said first source, and removing heat from the work medium at said second source; a pressure module comprising a pressure medium which is in selective fluid communication with the work medium from the first, high temperature source and the work medium from the second, low temperature source, for alternately performing a heat exchange process with the high/low temperature work medium, to have its temperature fluctuate between a minimal operative temperature and a maximal operative temperature corresponding to the high and low temperature of the respective work medium; a conversion module in mechanical communication with the pressure medium, configured for utilizing temperature fluctuation of the pressure medium for the production of output energy; and a heat recovery arrangement in thermal communication with at least one of the heat differential module and the pressure module, configured for receiving at least a portion of the heat energy of the high and low temperature work medium which was not transferred to the pressure medium during said heat exchange process, and redirecting said heat energy back to one of the heat differential module and the pressure module; wherein provision of heat to the work medium is performed by way of a heat exchange process with an auxiliary high temperature fluid. | 08-28-2014 |
20140250885 | BOTTOMING CYCLE FOR AERODERIVATIVE TURBINE-BASED COMBINED POWER SYSTEMS AND METHODS FOR USING SAME - Systems and methods for implementing the systems includes aeroderivative gas turbine subsystem and an energy extraction subsystem extracting energy from an exhaust of the aeroderivative gas turbine subsystem, where the energy extraction subsystem includes a heat exchange subsystem, a dual pressure turbine subsystem, and a condensation-thermal compression subsystem and where an intercooler portion of the heat recovery and vapor generator subsystem permits a working fluid flow rate to be increased to relative to a flow of the exhaust stream resulting in a bottoming cycle gross output increase of at least 23% relative a dual pressure Rankine cycle bottoming cycle, a bottoming cycle net output increase of at least 25% relative a dual pressure Rankine cycle bottoming cycle, a combined cycle net output increase of at least 5.5% relative a dual pressure Rankine cycle bottoming cycle, and a combined cycle efficiency increase to at least 54% relative to 51.1% for a dual pressure Rankine cycle bottoming cycle. | 09-11-2014 |
20140311147 | HIGH PERFORMANCE STEAM POWER TOPPING CYCLE - Implementations described herein provide a high efficiency steam cycle that includes a steam turbine cycle coupled to output of a high performance steam piston topping (HPSPT) cycle. The HPSPT cycle includes a piston-cylinder assembly that extracts work from an expanding fluid volume and operates in a thermal regime outside of thermal operational limits of a steam turbine. The steam turbine cycle utilizes heat, transferred at the output of the HPSPT cycle, to generate turbine work. | 10-23-2014 |
20150027121 | Method to integrate regenerative rankine cycle into combined cycle applications - A system is disclosed that incorporates a regenerative Rankine cycle integrated with a conventional combined cycle. An added duct firing array, typically located after the combustion turbine exhaust and before the conventionally designed Heat Recovery Steam Generator (HRSG), is used to boost enthalpy of said exhaust. An added heating element downstream of the firing array provides sufficient heating for sensible heating, evaporation and superheating of feedwater that has been previously heated by feedwater heaters as part of a regenerative Rankine cycle. In practice, the condensate stream from the condenser is bifurcated such that a dedicated feedwater flow is directed to feedwater heaters. After further heating in the added heating element, the superheated steam, at the same pressure and temperature as the main steam, is now mixed with the main steam prior to turbine entry. The condensate is directed to the HRSG to be heated in conventional fashion. | 01-29-2015 |
20150033742 | METHOD FOR IMPROVING THERMAL-CYCLE YIELD IN NUCLEAR POWER PLANTS - The present invention relates to a method for increasing the efficiency of electric power generation in pressurized water nuclear power plants, comprising steps of superheating a main steam and reheating the reheated steam by means of an auxiliary circuit, where the streams for the superheating and the reheating work in parallel. | 02-05-2015 |
20150113989 | METHOD FOR OPERATING A POWER PLANT INSTALLATION - The invention relates to a method for operating a power plant, wherein in partial load operation the increase of temperature results at the outlet of the high-pressure turbine section as a consequence of a throttling by means of the intermediate pressure valve. | 04-30-2015 |
20150330260 | STEAM CONDITIONING SYSTEM - A steam conditioning system for discharging bypass steam into a condenser of a steam powered generating plant and other uses. The system includes a steam conditioning device comprising an inner evaporative core and an outer shell. The core may be formed of a tubular piping section disposed at least partially inside the outer shell forming an annular space therebetween. An inlet end of the core receives steam from a piping header fluidly connected to an upstream desuperheating pressure reducing station which injects liquid coolant into the steam stream. Steam discharges through the core outlet end into the outer shell, reverses direction, and flows into the condenser. In one embodiment, the steam conditioning device may be disposed inside the dome of the condenser except for the inlet end. The device intends to increase flow residence time to evaporate entrained carryover coolant droplets in the incoming steam before release to the condenser. | 11-19-2015 |
20150369124 | HEAT ENGINE OPERATING IN ACCORDANCE WITH CARNOT'S THERMODYNAMIC CYCLE AND CONTROL PROCESS - “THERMAL MACHINE OPERATING PURSUANT TO CARNOT THERMODYNAMIC CYCLE AND PROCESS CONTROL” refers to the present invention, to a “Machine that operates in accordance with the Carnot thermodynamic cycle” which, according to its general characteristics, has as basic principle of converting thermal energy into driving force in the driving force element, typically an engine or turbine. The system consists of a body with two chambers forming two stators with concentric rotor and shaft, independently of the driving force element, both carry out the four thermodynamic cycle transformations, two isotherms transformations and two differentially adiabatic. This machine has computer program logic, a set of sensors connected to an electronic unit, which executes a process that has four thermodynamic transformations according to the Carnot cycle. | 12-24-2015 |
20160032784 | METHOD FOR LOW LOAD OPERATION OF A POWER PLANT WITH A ONCE-THROUGH BOILER - The once-through boiler includes a water supply and at least an economizer, an evaporator superheater. No valves are provided between the economizer, the evaporator and the superheater. The high-pressure turbine includes a control valve. The method for low load operation of a power plant with a once-through boiler and a high pressure turbine includes providing a parameter indicative of the stable operation of the once-through boiler in once-through operation, and on the basis of this parameter adjusting the control valve in order to regulate the pressure within the economizer and evaporator and/or adjusting the temperature of the water supplied to the economizer. | 02-04-2016 |
20160040557 | CHARGING PUMP SYSTEM FOR SUPPLYING A WORKING FLUID TO BEARINGS IN A SUPERCRITICAL WORKING FLUID CIRCUIT - Provided herein are a heat engine system and a method for generating energy, such as transforming thermal energy into mechanical energy and/or electrical energy. The heat engine system may have a single charging pump for efficiently implementing at least two independent tasks. The charging pump may be utilized to remove working fluid (e.g., CO2) from and/or to add working fluid into a working fluid circuit during inventory control of the working fluid. The charging pump may be utilized to transfer or otherwise deliver the working fluid as a cooling agent to bearings contained within a bearing housing of a system component during a startup process. The heat engine system may also have a mass control tank utilized with the charging pump and configured to receive, store, and distribute the working fluid. | 02-11-2016 |
20160076405 | ENERGY RECOVERY DEVICE AND COMPRESSION DEVICE, AND ENERGY RECOVERY METHOD - An energy recovery device includes a plurality of heat exchangers connected in parallel with each other into which a plurality of heat sources flow, an expander for expanding a working medium, a dynamic power recovery unit, a condenser, a pump for sending the working medium which has flown out from the condenser to the plurality of heat exchangers, and a regulator for regulating inflow rates of the working medium flowing into the plurality of heat exchangers. The regulator regulates the inflow rates of the liquid phase working medium flowing into the plurality of respective heat exchangers such that a difference of temperatures or a difference of degrees of superheat of the gas phase working medium which has flown out from the plurality of respective heat exchangers falls within a certain range. Thereby, heat energy can be efficiently recovered from the plurality of heat sources having temperatures different from each other. | 03-17-2016 |
20160138427 | Waste Heat Recovery System and Method of Operating the Same - A method of recovering waste heat includes pressurizing a flow of working fluid and transferring heat from a hot gas stream to the flow of working fluid in at least two successively arranged heat transfer sections. At least some of the working fluid is converted to a superheated vapor by the transfer of heat, and passes through an expander to recover useful work. A portion of the flow of working fluid is directed along a branch after having passed through at least one of the heat transfer sections, and bypasses the expander and at least one of the heat transfer sections before being recombined with the working fluid that has passed through the expander. The total flow rate of working fluid can be adjusted to regulate the temperature of the hot gas stream downstream of the heat transfer sections, and the amount of fluid that bypasses along the branch can be adjusted to regulate the temperature of the superheated vapor. | 05-19-2016 |