| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shutdown method of an indirect internal reforming SOFC capable of performing sure reformation, anode oxidation deterioration prevention, and cell crack prevention. <P>SOLUTION: In this method, a stepwise fuel flow rate Fk(j) is set in advance, while an anode temperature is at an oxidation deterioration point or higher, a calculated value FkCAL of a reformable fuel flow rate is calculated. In the case of FkCALC≥FkE, if there is an intermediate flow rate Fk(j) of lower than the fuel flow rate and over FkE to the reformer at the time of starting the shutdown method in Fk(j), processes C1 to C5 are carried out sequentially. (C1) j to give a maximum value out of the intermediate flow rate is made to be J, (C2) FkCALC is calculated, (C3) if FkCALC>Fk(J), this returns to the process C2, (C4) if FkCALC≤Fk(J), the fuel flow rate to the reformer is made to be Fk(J+1), and J increased by 1, (C5) if J≠M, this returns to the process C2, and if J=M, this moves to the process D, and in (D), this is made to wait until the anode temperature is lowered below the oxidation deterioration point. <P>COPYRIGHT: (C)2010,JPO&INPIT |
