| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell capable of preventing excessive temperature rise and decrease while boosting comprehensive energy efficiency.SOLUTION: A solid oxide fuel cell (1) comprises: a fuel cell module (2); fuel supply means (38); means (45) for supplying oxidant gas for electricity generation; a burning part (18) which burns and heats a residual fuel; a heat storage material (7); and control means (110) for changing a fuel supply amount and then changing the electric power to be actually output later. The control means includes heat storage amount estimation means (110b) for estimating a heat storage amount based on a detected temperature and fuel supply amount change means (110a) for increasing fuel utilization as the heat storage amount increases. The heat storage amount estimation means estimates the heat storage amount based on the basic estimate value calculated based on a history of detected temperatures and a fast-response estimate value calculated based on a change rate of the detected temperatures in a period of time shorter than the history used to estimate the basic estimate value. |
