| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system capable of keeping and ensuring safety power generation operation by surely preventing trouble caused by freezing of water while suppressing loss of energy, complication of operation, and lack of maneuverability. <P>SOLUTION: The fuel cell system includes: a fuel cell 1; a cooling water tank 70 and a cooling water circulation passage 32; a hot water tank 10 and a hot water circulation passage 31; a heat exchanger 9; drain valves 25 to 27; temperature sensors 17, 18, 20; and a controller 41, wherein the controller selects circulation of at least either cooling water in the cooling water circulation passage or hot water in the hot water circulation passage, or alternatively selects water discharge by opening the drain valves, based on the water temperatures detected with the temperature sensors during suspension of the power generation of the fuel cell. <P>COPYRIGHT: (C)2009,JPO&INPIT |
