| 摘要 |
PROBLEM TO BE SOLVED: To suppress the deterioration of a fuel cell unit when a solid oxide fuel cell system is restarted many times at a higher temperature than a normal temperature.SOLUTION: A solid oxide fuel cell system (1) comprises: a fuel cell module (2); a fuel supply device (38); a reformer (20) which steam-reforms a fuel by catalyst; a water supply device (28); an oxidant gas supply device (45); a combustion unit (18) which combusts the fuel left unused; and a control device (110). The control device comprises a shutdown circuit (110a) which performs shutdown stop, and a restart circuit (110b) which performs hot start when the temperature in the solar cell module is not lowered. When the catalyst in the reformer is in a high temperature zone not less than a catalyst active temperature, the restart circuit performs hot start of the fuel cell module. When the catalyst in the reformer is in a medium-low temperature zone, the restart circuit does not perform hot start. |
