| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shutdown method of an indirect internal reforming SOFC, in which a positive reforming and anode oxidation deterioration prevention are possible. <P>SOLUTION: While the anode temperature is an oxidation deterioration point or more, (A) FkCALC is calculated and is compared with Fke, (B), if in A, FkCALK<Fke, B1-B4 are performed; (B1) the reforming catalyst layer is raised in temperature, (B2) then FkCALK is calculated and compared with Fke; (B3) if in B2, FkCALK<Fke, returns to B1, (B4); if that is not the case, the supply fuel flow-rate Fk to the reformer is made Fke, and returns to D, (C), if in the A, FkCALK≥Fke, C1-C3 are performed; (C1) then, FkCALK and FkMinCALK are calculated and are compared with Fke, (C2) if in the C1, FkMinCALK<Fke<FkCALK, Fk is made FkMinCALK, and returns to C1, (C3), if that is not the case, Fk is made Fke, and moves to D, and (D) waits the anode temperature becomes the oxidation deterioration point. Provided that, Fke: is a flow-rate of hydrocarbon system fuel to be supplied to the reformer in the state that such a condition is satisfied that the produced quantity of a reforming gas is a minimum required flow-rate FrMin or more for preventing the anode oxidation deterioration, when the anode temperature is in the temperature of oxidation deterioration point or higher; FkCALK: is the calculated value of the flow-rate of the hydrocarbon system fuel, capable of reforming by a reforming method of a kind performed after starting a shutdown method in the temperature of the measured reforming catalyst layer; FkMinCALK: is a flow-rate of the hydrocarbon system fuel capable of producing FrMin reforming gas by the reformer. <P>COPYRIGHT: (C)2010,JPO&INPIT |
