| 摘要 |
PURPOSE: To provide a control method by which protective operation can be safely performed without damaging a fuel cell main body even when a shortage of a supply oxygen is caused. CONSTITUTION: Unit cells 5 formed by sandwiching an electrolyte layer 2 by a fuel electrode 3 and an air electrode 4 are layered by plural layers by interposing a separator 6, and are formed by properly incorporating a cooling plate 7. In this fuel cell main body 1, an electric potential difference between a fuel gas outlet voltage sensor 8 and a fuel gas outlet voltage sensor 9 arranged in the outlet vicinity and the inlet vicinity of fuel gas of the fuel electrode 3 is measured. When a measured value exceeds a preset value A, a control signal is sent to a control valve 14 from a control device 12, and a flow rate of raw material fuel to be sent to a reforming system reactor 13 is increased. When the measured valve further exceeds a preset value B higher than A, a value of a load 10 is reduced by a control signal from the control device 12, and when the measured value further exceeds a preset value C higher than B, a load switch 11 is cut off by a control signal from the control device 12, and operation of a device is stopped. |
