摘要:
A fuel cell system of the present invention includes: a fuel cell (1) having an electrolyte membrane (2), an anode (3) and a cathode (4) sandwiching the electrolyte membrane (2), a cathode gas passage (98) through which an oxidizing gas is supplied to and discharged from the cathode (4), and an anode gas passage (97) through which a fuel gas is supplied to and discharged from the anode (3); a fuel gas channel having an anode gas passage (97) and through which the fuel gas is supplied to and discharged from the anode (3); and an oxidizing gas channel having the cathode gas passage (98) and through which the oxidizing gas is supplied to and discharged from the cathode (4). When the fuel cell system stops generating electric power, the fuel gas channel and the oxidizing gas channel are closed, and a gas is supplied from a downstream side of the cathode gas passage (98) to an oxidizing gas filled space (112) which is practically isolated from outside by closing the oxidizing gas channel and includes the cathode gas passage (98).
摘要:
A fuel cell system of the present invention includes: a fuel cell (1) having an electrolyte membrane (2), an anode (3) and a cathode (4) sandwiching the electrolyte membrane (2), a cathode gas passage (98) through which an oxidizing gas is supplied to and discharged from the cathode (4), and an anode gas passage (97) through which a fuel gas is supplied to and discharged from the anode (3); a fuel gas channel having an anode gas passage (97) and through which the fuel gas is supplied to and discharged from the anode (3); and an oxidizing gas channel having the cathode gas passage (98) and through which the oxidizing gas is supplied to and discharged from the cathode (4). When the fuel cell system stops generating electric power, the fuel gas channel and the oxidizing gas channel are closed, and a gas is supplied from a downstream side of the cathode gas passage (98) to an oxidizing gas filled space (112) which is practically isolated from outside by closing the oxidizing gas channel and includes the cathode gas passage (98).
摘要:
A fuel cell power generation system including a fuel cell, a fuel generator, an oxidizing gas supply device, an output controller, an open-close mechanism, and a controller. The controller is configured such that in a stop process, the controller controls the output controller to stop supplying the electric power to an external load; controls the oxidizing gas supply device to stop supplying an oxidizing gas and controls the open-close mechanism to close a passage upstream from an oxidizing gas channel; after the passage upstream from the oxidizing gas channel is closed, stops a raw material gas supply device and a water supply device when a predetermined period has elapsed, during which period a gas in the oxidizing gas channel is replaced by a fuel gas.
摘要:
A fuel cell power generation system including a fuel cell, a fuel generator, an oxidizing gas supply device, an output controller, an open-close mechanism, and a controller. The controller is configured such that in a stop process, the controller controls the output controller to stop supplying the electric power to an external load; controls the oxidizing gas supply device to stop supplying an oxidizing gas and controls the open-close mechanism to close a passage upstream from an oxidizing gas channel; after the passage upstream from the oxidizing gas channel is closed, stops a raw material gas supply device and a water supply device when a predetermined period has elapsed, during which period a gas in the oxidizing gas channel is replaced by a fuel gas.
摘要:
A controller (15) performs a stop operation of stopping electric power generation by a fuel cell (3); then performs an activity recovery operation of stopping the supply of a fuel gas by a fuel gas supply unit (10) to an anode (2a), causing an anode inert gas supply unit (13) to supply an inert gas to the anode (2a), and causing an oxidizing gas supply unit (11) to supply an oxidizing gas to a cathode (2b); and performs control such that the fuel gas supply unit (10) resumes supplying the fuel gas to the anode (2a) to resume the electric power generation by the fuel cell (3) after the cell voltage of the fuel cell (3) which is detected by a voltage detector (14) has decreased to a first voltage or lower.
摘要:
There is provided a fuel cell power generation system that exhibits superior efficiency of power generation and durability.The fuel cell power generation system includes: a fuel cell 4 including a fuel electrode 2, an oxidant electrode 3, and an electrolyte 1 on which the fuel electrode 2 and the oxidant electrode 3 are formed; an output control unit 11 that controls an output of the fuel cell 4; and a determination unit 12 that determines, based on an integrated amount of impurities contained in an oxidant gas and supplied to the oxidant electrode 3, a time at which the fuel cell 4 is brought into an open circuit state. The output control unit 11 halts power generation of the fuel cell 4 for a predetermined period of time every time determined by the determination unit 12, thereby bringing the fuel cell 4 into the open circuit state.
摘要:
A fuel cell system includes a fuel cell that is subjected to a purge operation of supplying an inert gas to an anode and/or cathode upon shut-down of the fuel cell. The differential pressure ΔP is defined as ΔP=Pa−Pc where Pa is the pressure in an inlet-side flow path leading to the anode and Pc is the pressure in an inlet-side flow path leading to the cathode. The differential pressure during the purge operation is controlled such that the differential pressure during operation ΔPo and the differential pressure during the purge operation ΔPp satisfy the relation: 0
摘要:
A fuel cell system includes a fuel cell that is subjected to a purge operation of supplying an inert gas to an anode and/or cathode upon shut-down of the fuel cell. The differential pressure ΔP is defined as ΔP=Pa−Pc where Pa is the pressure in an inlet-side flow path leading to the anode and Pc is the pressure in an inlet-side flow path leading to the cathode. The differential pressure during the purge operation is controlled such that the differential pressure during operation ΔPo and the differential pressure during the purge operation ΔPp satisfy the relation: 0
摘要:
A fuel cell system includes a fuel cell; a fuel gas supplying unit supplying the fuel gas into the fuel cell on the anode side thereof; an oxidizing agent gas supplying unit supplying the oxidizing agent gas into the fuel cell on the cathode side thereof; a raw material gas supplying unit supplying the raw material gas into the fuel cell; and a controlling unit controlling the supply of the fuel gas, the oxidizing agent gas and the raw material gas. After switching the output of electric power or the fuel cell off, the fuel gas supplying unit suspends the supply of the fuel gas, the oxidizing agent gas supplying unit suspends the supply of the oxidizing agent gas and the raw material gas supplying unit supplies the raw material gas into the fuel cell to purge the fuel cell on the cathode side.
摘要:
Problems of acceleration of drying of electrolyte membrane and local reaction, etc. can be properly coped with to attain the stabilization of performance of fuel cell.There are provided a fuel cell 121 which generates electric power from a fuel gas and an oxidizing agent gas, a fuel gas feed pipe 161 and a first switch valve 129 as fuel gas supplying unit which supplies the said fuel gas into the said fuel cell on the anode side thereof, an oxidizing gas supplying pipe 162 and a second cut-off valve 131 as oxidizing agent gas supplying unit which supplies the said oxidizing agent into the said fuel cell on the cathode side thereof, a raw material gas supplying pipe 151 and a third switch valve 143 as raw material gas supplying unit which supplies raw material of the said fuel gas into the fuel cell and a control portion 127 which controls the supply of the said fuel gas, the supply of the said oxidizing agent and the supply of the said raw material and the control portion 127 controls during the starting of electricity generation of the fuel cell 121 such that the said raw material gas supplying unit purges the fuel cell 121 at least on the cathode side thereof with the said raw material gas before the oxidizing agent gas supplying unit and the fuel gas supplying unit supply the fuel gas and the said oxidizing agent gas into the fuel cell 121, respectively.