摘要 |
A fuel cell system is provided with a humidifying device ( 27, 28 ) for humidifying at least one of fuel gas and oxygen-bearing gas, a water passage ( 11 ) through which water from a water tank ( 5 ) flows, a water removing device ( 2, 3, 3 a, 4 ) for supplying purge gas to the water passage in order to remove the water in the water passage, and a water recirculating device ( 8 ) for enabling water to flow through the water passage. The fuel cell system is also provided with a shutoff valve ( 7 ) for blocking the water passage such that water from the water tank does not flow into the water recirculating device, the shutoff valve ( 7 ) being provided between the water tank ( 5 ) and the water recirculating device ( 8 ). When a shutdown operation of the fuel cell system begins, a controller ( 48 ) controls the shutoff valve ( 7 ) to open and controls the water removing device ( 2, 3, 3 a, 4 ) such that purge gas is supplied to the water passage. The controller ( 48 ) also controls the shutoff valve ( 7 ) to block the water passage after the water has been expelled from the water passage.
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