| 摘要 |
PROBLEM TO BE SOLVED: To improve energy using efficiency by placing a combustor, transferring excess fuel gas and excess air from a cell through the combustor to combust them, and using heat of combustion gas for heating feed water. SOLUTION: Excess hydrogen from a cell pole and excess air from an air pole in a solid polymer type fuel cell(PEFC) are transferred through a combustor to be combusted. Generated combustion gas is guided into a heat exchanger and is heated by heat exchange with feed water. The heated fed water is used as hot water. Temperature of the hot water is detected by a temperature detector T1, and is adjusted by increasing or decreasing feed water amount. Cell cooling water of the PEFC is circulated through a pump P by a closed circuit, and feed water is heated via the heat exchanger to provide the hot water. When the PEFC is operated at 100 deg.C, for example, the temperature is controlled by adjusting water amount supplied to the heat exchanger provided on the way of this closed circuit. |
