| 摘要 |
The fuel cell system has: a fuel cell stack having a fuel electrode and an oxidant electrode that face each other with a electrolyte membrane interposed between the fuel electrode and the oxidant electrode; a gas supply unit configured to supply a fuel gas to the fuel electrode and an oxidant gas to the oxidant electrode; a fuel gas circulation unit configured to return a fuel gas discharged from an outlet of the fuel electrode to an inlet of the fuel electrode; a purge valve configured to discharge a gas outside from a circulation path connected between the outlet and the inlet of the fuel electrode; a temperature measuring unit configured to measure a temperature of the fuel gas; and a control unit configured to control, according to the temperature of the fuel gas and a variation in the fuel gas temperature, a flow rate of the gas to be discharged from the purge valve. The control unit increases the flow rate of the gas to be discharged if the variation in the fuel gas temperature is positive and decreases the flow rate of the gas to be discharged if the variation in the fuel gas temperature is negative.
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