| 摘要 |
There is provided a fuel gas supply manifold ( 4 ) which extends through a plurality of cells ( 1 ) in the stacking direction and which is adapted to introduce a fuel gas to the cells ( 1 ). There are provided a bypass passage ( 9 ) connecting the downstream end of the fuel gas supply manifold ( 4 ) to the fuel gas exhaust manifold ( 7 ), and a valve ( 11 ) for opening and closing the bypass passage ( 9 ). When starting the supply of a fuel gas to the fuel gas supply manifold ( 4 ), the valve ( 11 ) is opened, whereby most of the air in the fuel gas supply manifold ( 4 ) is driven away to the exterior through scavenging by the fuel gas by way of the bypass passage ( 9 ) without causing it to pass through the interior of the cells.
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