| 摘要 |
A fuel cell system comprising: a fuel cell (1); a cooling water tank (7) 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 by the temperature sensors during suspension of the power generation of the fuel cell.
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