摘要:
A fuel cell cogeneration system of the present invention includes: a cell (10); a fuel gas discharging manifold (122) which is formed to extend in a thickness direction of the cell (10) and through which an anode off gas unconsumed in an anode (2A) flows; an oxidizing gas discharging manifold (124) which is formed to extend in the thickness direction of the cell (10) and through which a cathode off gas unconsumed in a cathode (2B) flows; and a cooling medium discharging manifold (126) which is formed to extend in the thickness direction of the cell (10) and through which an off cooling medium having recovered heat from the cell (10) flows, and the fuel gas discharging manifold (122) and/or the oxidizing gas discharging manifold (124) are formed between the cooling medium discharging manifold (126) and a separator end closest to the cooling medium discharging manifold (126).
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 power generation system of the present invention includes: a fuel cell (3); a fuel gas supply mechanism (10); an oxidizing gas supply mechanism (11); an electric power output unit (18); a cooling mechanism (12); and a controller (20) configured to carry out a first step in which the controller controls the electric power supplied from the electric power output unit (18) to at least one of an internal load (21) and an external load (17) such that a voltage of the fuel cell (3) temporarily becomes equal to or higher than a first voltage by which a sulfur compound adhered to a cathode (2b) oxidizes, and then, carry out a second step in which the controller causes the cooling mechanism (12) to cool the fuel cell (3) to condense steam in the fuel cell (3) and stops supplying the oxidizing gas from the oxidizing gas supply mechanism (11).
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 (10) of the present invention includes: two end plates (18) respectively disposed on both sides of a cell stack (12) in a stack direction; a fastening band (22) configured to fasten the cell stack (12) and the end plates (18) in the stack direction; a connecting portion (24) configured to connect one end portion (22e) and the other end portion (22f) of the fastening band (22); and a displacement restricting portion (26) disposed on at least one of the end plates (18) to restrict displacement of the fastening band (22) in a direction away from a surface (18c) of the end plate (18).
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:
Durability of a fuel cell sometimes decreases due to deterioration of the catalyst when the fuel cell is stored for a long time. Disclosed is a fuel cell system comprising a stack (38) for generating electric power from a fuel gas and an oxidant, a fuel gas supplying means, an oxidant gas supplying means, a raw material gas supplying means including a raw material gas piping (33), a bypass pipe (55) and distributors (56, 60) for supplying a raw material of the fuel gas to a fuel cell, and a control unit (44). After power output of the fuel cell is turned off, the fuel gas supplying means stops supplying the fuel gas to the anode side of the fuel cell and the oxidant gas supplying means stops supplying the oxidant to the cathode side of the fuel cell, while the raw material gas supplying means supplies the raw material from the input side of the cathode of the fuel cell, thereby purging the cathode side of the fuel fell.
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.