| 摘要 |
PURPOSE:To prevent a circulating quantity of cathode gas and motive power consumption of a blower from becoming excessive when a partial load is applied to a fuel cell by arranging an air preheater, a bypass line and an air adjusting valve, and adjusting an air quantity flowing in the bypass line so that a combustion exhaust gas temperature can coincide with a control setting temperature. CONSTITUTION:An air preheater 22 is arranged in an exhaust gas line 12, and air supplied to a combustion chamber 10a of a reformer is heated indirectly by combustion exhaust gas 4 coming out from the reformer 10. A bypass line 24 supplies the air 6 to the combustion chamber 10a of the reformer by bypassing the air preheater 22, and an air adjusting valve 26 adjusts an air quantity flowing in the bypass line. A control setting value of a combustion exhaust gas temperature at an outlet of the air preheater 22 is set high in a low load according to a load of a fuel cell, and is set low in a high load, and the air quantity flowing in the bypass line is adjusted so that the combustion exhaust gas temperature can coincide with the control setting temperature. |
