| 摘要 |
Provided is a method for load following operation of a fuel cell system in which reliable reforming and the prevention of flow blockage and anode degradation are possible. The correspondence between cell outputs P i and fuel flow rates F i are set beforehand, and a reformable fuel flow rate F R is obtained from a reforming catalyst layer temperature. When F R < F min (minimum F i ), electric power generation is stopped. When F R ‰¥ F min , 1) is performed if an output demand value P D is equal to or less than the maximum output P M , and 2) is performed if P D > P M . 1) F DS described in the description is obtained. In the case of F DS ‰¤ F R , the output is set to P D , and the fuel flow rate is set to F DS . In the case of F DS > F R , if there is a P i less than P D and corresponding to F i , that is equal to or less than F R , the output is set to the maximum value of the P i , and the fuel flow rate is set to F i corresponding to this value, and if there is no P i less than P D and corresponding to F i , that is equal to or less than F R , electric power generation is stopped, and the fuel flow rate is set to F R . 2) In the case of F M (F i corresponding to P M ) ‰¤ F R , the output is set to P M , and the fuel flow rate is set to F M . In the case of F M > F R , if there is a P i corresponding to F i , that is equal to or less than F R , the output is set to the maximum value of such P i , and the fuel flow rate is set to F i corresponding to this value, and if there is no P i corresponding to F i , that is equal to or less than F R , electric power generation is stopped, and the fuel flow rate is set to F R . Also provided is a fuel cell system appropriate for this method. |
