| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the occurrence of dew condensation while preventing excessive energy consumption after stopping operation. <P>SOLUTION: A controller 10 determines, in stopping the operation of a fuel cell system 1a, whether or not water included in a cathode off-gas builds up condensation when the temperature of the cathode off-gas in an outlet-side pipe 14 on an oxygen electrode side is lowered, based on respective detection values outputted from an outside air temperature sensor 16 detecting outside temperature (for instance, the temperature of outside air or the like), an upstream-side condition sensor 41 detecting off-gas temperature and off-gas humidity on the upstream side of a pressure sensor 15, a temperature sensor 34 detecting the temperature in a gas pressure detection chamber 25, and a humidity sensor 35 detecting the humidity in the gas pressure detection chamber 25, starts execution of carrying a current to a heater 33 as control of lowering the humidity of the cathode off-gas when it is determined that the water builds up condensation, and starts execution of scavenging for supplying, as a scavenging gas, air to an oxygen electrode of a fuel cell and a passage of the cathode off-gas by driving a supercharger. <P>COPYRIGHT: (C)2009,JPO&INPIT |
