| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent deterioration of an electrode catalyst during stop and storage, suppress abnormal temperature rising of a reformer, and enhance reliability in a fuel cell power generation system using the reformer as a fuel gas supply means. <P>SOLUTION: In the control method, when a fuel cell stack 1 is stopped and stored, a first control signal for controlling an oxidant gas control means 13a in order to stop supply of oxidant gas, a second control signal for controlling a raw fuel control means 8a in order to reduce the supply amount of raw fuel, a third control signal for controlling a fuel offgas control means 11a in order to shut off a fuel offgas exhaust passage based on a fuel offgas backward flow preventing judgement reference, and a fourth control signal for controlling a fuel gas control means 10a in order to shut off a fuel gas supply passage are successively sent, and in order to shut off an oxidant offgas exhaust passage by sending the fourth control signal at the latest, a control means for sending a control signal controlling an oxidant offgas control means 14a is installed. <P>COPYRIGHT: (C)2007,JPO&INPIT |
