| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent sudden fall in a fuel cell stack temperature, and operate a fuel cell power generation device efficiently. <P>SOLUTION: A fuel cell power generation device includes at least: a fuel cell stack in which a power generation cell that has a solid electrolyte layer deployed between an air electrode layer and a fuel electrode layer is laminated pinching a separator; a fuel gas supply means to supply the fuel gas to the fuel electrode layer; an oxidizer gas supply means to supply the oxidizer gas to the air electrode layer; and a steam supply means to introduce steam into the fuel gas supply passage. When the operation of the fuel cell power generation device is stopped for an emergency, supply of the fuel gas and the steam is stopped. Then, a flow amount of the oxidizer gas is set at a second flow amount that is smaller than the first flow amount of the rated power generation time, but larger than the flow amount at which oxygen within the solid electrolyte layer slips out of the crystal lattice then causes that the crystal structure is changed and no longer functions as an ion-conducting body, and preferably at the minimum flow amount in which the crystalline change due to oxygen deficiency does not occur in the solid electrolyte layer. <P>COPYRIGHT: (C)2010,JPO&INPIT |
