FUEL CELL SYSTEM

PROBLEM TO BE SOLVED: To provide a fuel cell system capable of simplifying operation control while saving energy.SOLUTION: A fuel cell system 100 includes: a fuel cell 5 that generates power using an oxidant gas and a hydrogen containing gas; a cooling water circulation channel 9 for allowing circulation of a cooling water for collecting heat from the fuel cell 5; a cooling water tank 11 which is disposed in the cooling water circulation channel 9 for storing the cooling water; a condensed water tank 12 for storing condensed water which is obtained by condensing vapor of water contained in the exhaust gas exhausted from the fuel cell 5; and a condensed water supply channel 14 for supplying the condensed water to the cooling water circulation channel 9. The fuel cell system 100 has no other channel for discharging the water from the condensed water tank 12 than the condensed water supply channel 14. The cooling water tank 11 is arranged to discharge excess cooling water to the outside from a discharge port.SELECTED DRAWING: Figure 1 【課題】運転制御の簡素化と省エネ化が可能となる燃料電池システムを供給する。【解決手段】酸化剤ガス及び水素含有ガスを用いて発電する燃料電池５と、燃料電池５の熱を回収する冷却水が循環する冷却水循環経路９と、冷却水循環経路９に設けられ冷却水を貯える冷却水タンク１１と、燃料電池５から排出される排ガスに含まれる水蒸気を凝縮して得られる凝縮水を貯える凝縮水タンク１２と、凝縮水を冷却水循環経路９に供給する凝縮水供給経路１４と、を備えた燃料電池システム１００であって、凝縮水供給経路１４の他に凝縮水タンク１２の水を排出する経路がなく、冷却水タンク１１は、冷却水の余剰分を排水口から外部に排出できるように構成されている、燃料電池システム１００を提供する。【選択図】図１