| 摘要 |
A fuel cell stack ( 2 ) of a fuel cell power plant ( 1 ) generates electric power using a fuel gas such as hydrogen supplied from a fuel gas supply device ( 3, 5, 5 a), and an oxidant gas such as air supplied from an oxidant gas supply system ( 4 ). The fuel cell stack ( 2 ), fuel gas supply device ( 3, 5, 5 a) and oxidant gas supply system ( 4 ) are housed in a casing ( 6 ). The casing ( 6 ) is provided with a ventilation fan ( 7 ). The concentration increase of the fuel gas in the casing ( 6 ) due to leaks is appropriately suppressed by the controller ( 10 ) controlling the operation of the fan ( 7 ) based on the power generation load of the fuel cell stack ( 2 ).
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