Patent ID: 7611785
Filing Date: 2009-11-03
Classification: H01M,Y02E

Abstract:
1. A generation method using a fuel cell generation system having a solid polymer membrane forming an electrolyte, having a fuel electrode and fuel gas passages for supplying to the fuel electrode a fuel gas containing hydrogen as a main component on one side of the solid polymer membrane, and having an oxidizer electrode on the other side of the solid polymer membrane, the method comprising the steps of: supplying the fuel gas to the fuel electrode through the fuel gas passages at a low pressure; supplying an oxidizer gas to the oxidizer electrode at a low pressure; generating electricity by causing electrochemical reaction between the fuel gas and the oxidizer gas supplied; and controlling a fuel utilization ratio on the fuel electrode so as to prevent the fuel gas passages from being clogged with condensed water, wherein a target value is preset for the fuel utilization ratio in the controlling step, to a low value when an output of the fuel cell generation system is low and to a high value in the vicinity of a rated operation point, and wherein the fuel utilization ratio is a ratio of an amount of gas actually consumed for the reaction to an amount of gas supplied for the reaction.