摘要 |
A temperature sensor 32 detects the temperature of a coolant circulating in a coolant supply system 3 of a fuel cell 20. A control unit 80 monitors the temperature detected by the temperature sensor 32. When the temperature of the coolant is higher than a target temperature, the control section switches a rotary valve 34 to a radiator-side flow path so that a radiator 33 cools the coolant, and when the temperature of the coolant is lower than the target temperature, the control section switches the rotary valve 34 to a bypass-side flow path to raise the temperature of the coolant through FC generation so that the temperature detected by the temperature sensor 32 is equal to the target temperature. During the process above, in a low temperature environment, the target temperature is raised to a temperature that is higher than a target temperature during a normal operation, while a heater 130 heats the coolant. Through the above processing, the temperature inside the fuel cell can be prevented from decreasing excessively even in the low temperature environment.
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