| 摘要 |
<P>PROBLEM TO BE SOLVED: To quickly start power generation startup for a fuel cell stack by preventing freezing of product water and a cooling medium inside under a low-temperature environment below freezing point. <P>SOLUTION: An air guide-in channel 6 branched from an air supply channel 21 reaching an air compressor 23 is connected to a cooling water supply channel 41 of a cooling water circulation system 4 for cooling a fuel cell stack 1 through a flow channel switching valve 63. To a cooling water exhaust channel 42 of the cooling water circulation channel 4, a cooling water recovery channel reaching a cooling water tank 71 is connected through a flow channel switching valve 72. At stoppage of operation, at the same time as a scavenging treatment, air pressurized by the air compressor 23 is guided in from the air guide-in channel 6 into a cooling water flow channel 45 in the fuel cell stack 1 to recover cooling water to the cooling water tank 71. <P>COPYRIGHT: (C)2009,JPO&INPIT |
