| abstract |
A fuel cell system (10) includes a fuel cell (12), a fuel gas supply unit (14) for supplying a fuel gas to the fuel cell (12), an oxygen containing gas supply unit (18), which has a heat exchanger (16) for heating an oxygen-containing gas, for supplying the oxygen-containing gas heated by the heat exchanger (16) to the fuel cell (12), an exhaust gas discharge unit (20) for supplying an exhaust gas used in a generating reaction and discharged from the fuel cell (12), as a heating medium for heating the oxygen-containing gas to the heat exchanger (16), and a combustion gas supply unit (24), which has a combustor (22) disposed out of a passageway of the exhaust gas discharge unit (20) for generating a combustion gas by combusting a raw fuel with an oxygen-containing gas supplied thereto, for supplying the combustion gas, together with the exhaust gas, to the heat exchanger (16). |