| 摘要 |
PROBLEM TO BE SOLVED: To suppress reduction in output performance due to impurity mixed in a circulating path for supplying a gas by providing a removing means for removing an electric power generation inhibitor in the circulating path when a predetermined electric power generating condition in the circulating path for circulating and supplying at least one gas of first and second gases. SOLUTION: In this fuel cell apparatus, a hydrogen supply/exhaust system 10 and each fuel cell stack 2 construct a circulating path. The hydrogen supply/ exhaust system 10 is provided with a hydrogen common supply tube 11 and a hydrogen common exhaust tube 12. A check valve 13 accepts only a flow from the hydrogen common exhaust tube 12 to the hydrogen common supply tube 11. A purge valve 41 is generally closed and when opened, a gas in the hydrogen supply/exhaust system 10 is released. The impurity other than the hydrogen is accumulated in the hydrogen supply/exhaust system 10 or is attached on an electrode and then output performance is reduced with the lapse of time. Accordingly, the gas is released in the air for a predetermined period at a certain interval. When voltage or hydrogen concentration is decreased even within a predetermined period, purging is preformed. |
