To provide a fuel cell power generation system capable of suppressing deterioration of an electrolyte membrane in stopping, and of suppressing deterioration of an electrode catalyst layer in starting, and capable of reducing the quantity of an inactive gas (nitrogen gas or the like) required for purge; and to provide its operation method.
For instance, when a power generation operation is stopped, dew condensation is caused in a fuel cell body 33 by executing cooling of the fuel cell body 33 by a cooling pipe 69 or the like; supply of oxygen gas by an oxygen cylinder 35 is stopped, and supply of hydrogen gas by a hydrogen cylinder 35 or the like is stopped; and thereafter, when a temperature measurement value of a cooling water entrance temperature (c) (that is, the fuel cell body 33) by a thermometer 73 is lowered to 20°C, nitrogen gas is supplied from a nitrogen cylinder 37 to the cathode side in the fuel cell body to exhaust oxygen gas from the cathode side in the fuel cell body, and nitrogen gas is supplied from a nitrogen cylinder 36 to the anode side in the fuel cell body to exhaust hydrogen gas from the anode side in the fuel cell body 33.
COPYRIGHT: (C)2008,JPO&INPIT
ITO EIKI
YAMADA AKIHIKO
YAMADA TAMOTSU
BABA TAKANORI
| JPH0381970A | 1991-04-08 | |||
| JPH09312165A | 1997-12-02 | |||
| JP2005158298A | 2005-06-16 | |||
| JP2005509261A | 2005-04-07 | |||
| JP2003257461A | 2003-09-12 | |||
| JP2005116402A | 2005-04-28 |
Tadahiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto
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