| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent deterioration of a fuel cell stack by suppressing the increase in the conductivity of condensed water to be circulated in a fuel cell system. <P>SOLUTION: In this circulation method of condensed water in a fuel cell system, moisture included in an anode off-gas discharged from a fuel cell is condensed to be stored in an anode drain tank as condensed water and circulated in the system; and when the conductivity of the condensed water stored in the anode drain tank is high, the condensed water is discharged, without making it circulate. In at least either the starting or the stopping of the fuel cell system, steaming drain water V<SB>0</SB>-V<SB>2</SB>, V<SB>6</SB>-V<SB>9</SB>condensed by steaming for running steam, in a state without supplying a hydrocarbon material to a reforming device, and stored in the anode drain tank is discharged, without being made to circulate inside the system. <P>COPYRIGHT: (C)2008,JPO&INPIT |
