| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system avoiding generation of negative pressure in a closed passage of a flow channel formed after operation is finished, and to provide an operation method of a fuel cell power generation system. <P>SOLUTION: The fuel cell system includes a fuel processor 12 generating fuel gas with the use of raw gas, a burner 14 for heating the fuel processor 12, a fuel cell 11 for carrying out power generation with the use of fuel gas supplied from the fuel processor 12 and oxidant gas supplied from outside, a plurality of valves 21 to 23, 25 to 27 carrying out conduction/shutting off of gas flowing, and a control device 40 controlling opening and closing operations of the plurality of valves. The control part 40, when operation is finished, closes the valves 21 to 23 and opens the remaining valves 25 to 27, and after the specified time is elapsed, valves 21, 22 in the upstream position than the valve 23 in the most downstream position in the gas flow direction out of the closed state valves 21 to 23, the original pressure of the raw gas is applied to a passage formed by the closed state valve 23. <P>COPYRIGHT: (C)2009,JPO&INPIT |
