Convion Oy Patent applications |
Patent application number | Title | Published |
20160141653 | METHOD AND ARRANGEMENT FOR UTILIZING RECIRCULATION FOR HIGH TEMPERATURE FUEL CELL SYSTEM - An arrangement utilizing recirculation for high temperature fuel cell system, each fuel cell including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, wherein the fuel cell system can perform anode side recirculation flow of reactants. The arrangement can accomplish a recycle ratio of 70% or more for the recirculation flow, feed to the recirculation a feed-in flow, which can include substantially high oxygen content, the feed-in flow being 30% or less of entire flow, perform heat exchanging to provide substantially reduced low temperature conditions in the recirculation flow, perform catalytic partial oxidation in the recirculation flow to produce a substantially high amount of hydrogen for the recirculation flow in fuel cell system start-up or shutdown situations, and exhaust 30% or less of the entire flow from the anode side recirculation. | 05-19-2016 |
20150147665 | METHOD AND ARRANGEMENT FOR UTILIZING RECIRCULATION FOR HIGH TEMPERATURE FUEL CELL SYSTEM - An arrangement utilizing recirculation for high temperature fuel cell system, each fuel cell including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, wherein the fuel cell system can perform anode side recirculation flow of reactants. The arrangement can accomplish a recycle ratio of 70% or more for the recirculation flow, feed to the recirculation a feed-in flow, which can include substantially high oxygen content, the feed-in flow being 30% or less of entire flow, perform heat exchanging to provide substantially reduced low temperature conditions in the recirculation flow, perform catalytic partial oxidation in the recirculation flow to produce a substantially high amount of hydrogen for the recirculation flow in fuel cell system start-up or shutdown situations, and exhaust 30% or less of the entire flow from the anode side recirculation. | 05-28-2015 |
20140178783 | OFFSET CONTROL ARRANGEMENT AND METHOD FOR CONTROLLING VOLTAGE VALUES IN A FUEL CELL SYSTEM - An offset control arrangement is disclosed for controlling voltage values in a fuel cell system including an anode side, a cathode side and an electrolyte between the anode side and the cathode side. The fuel cell system can include at least one fuel cell array of at least two fuel cells, and at least one load for performing load function. The offset control arrangement can include voltage monitoring for monitoring an input voltage of the load, a control processor for processing the monitoring information, and at least one offsetting source in serial connection to the at least one fuel cell array, with a power level of the offsetting source being substantially low compared to the power level of the fuel cell array, and the offsetting source being arranged to perform at least unidirectional shifting of fuel cell array output voltage. | 06-26-2014 |
20140113162 | METHOD AND ARRANGEMENT FOR MINIMIZING NEED FOR SAFETY GASES - An arrangement is disclosed for reducing use for safety gases in a high temperature fuel cell system, each fuel cell in the fuel cell system including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side. The fuel cells can be arranged in fuel cell stacks. The fuel cell system can include a fuel cell system piping for reactants, and feeding of fuel to the anode sides of the fuel cells. Electrical anode protection can be achieved by supplying a predefined voltage separately to at least two fuel cell stacks or groups of fuel cell stacks to prohibit oxidation of anodes. | 04-24-2014 |
20140056035 | METHOD AND ARRANGEMENT FOR IMPROVED OPERABILITY OF A HIGH TEMPERATURE FUEL CELL SYSTEM - An arrangement for improved operability of a high temperature fuel cell device at higher fuel cell voltage values than nominal voltage values, each fuel cell in the fuel cell device including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, and the arrangement includes means for determining temperature information of the fuel cells and main power converter for loading fuels cells at least up to their rated power level. The arrangement includes a non-isolating pre-regulator for reducing the fuel cell voltage to a voltage level useable for the main power converter at least at substantially low power levels in start-up and low current load situations when the fuel cell voltage is significantly higher than in nominal operation conditions, the pre-regulator being located between the fuel cells and the main power converter, and the arrangement includes bypass means for bypassing the pre-regulator at substantially high current loads when the fuel cell voltage has decreased to the voltage level suitable for an input voltage of the main power converter. | 02-27-2014 |
20130266880 | METHOD AND ARRANGEMENT FOR AVOIDING ANODE OXIDATION - An exemplary cooling arrangement for high temperature fuel cell system for substantially reducing the amount of purge gas in a system shutdown situation includes a fuel cell having an anode side, a cathode side, and an electrolyte between the anode side and the cathode side. The cooling arrangement includes a coolant source capable of providing coolant to be used in a cooling process of the high temperature fuel cell system during the system shutdown situation, and a cooling structure in connection with the coolant source arranged in a thermal effect area of the fuel cell stacks. The arrangement also includes the vessel that feeds the coolant into the cooling structure from the coolant source, a heat exchanger that exhausts used coolant from the cooling structure, and an actuating device that uses a triggering force to trigger a coolant flow in the cooling structure, when the system shutdown situation has started. | 10-10-2013 |
20130171533 | METHOD AND ARRANGEMENT TO CONTROL OPERATING CONDITIONS IN FUEL CELL DEVICE - An exemplary arrangement and method for controlling operating conditions of a fuel cell device are disclosed. The fuel cell device having plural fuel cells, each including an anode side, a cathode side, an electrolyte between the anode side and the cathode side, and being arranted in a stack. The control arrangement includes at least one controllable electrical heater configured to produce controllable heat quantities, at least two controllers that control fuel cell quantities including at least a portion of air flowing to the fuel cells and heat applied to the stack environment. The controllable heat quantities and controllable fuel cell quantities are controlled to meet a target value. The fuel cell device includes a low level high speed controller configured to control at least one controllable electrical heater to operate the heater as a buffer for excess energy of the fuel cell device. | 07-04-2013 |