STOPPING METHOD OF FUEL CELL SYSTEM, START-UP METHOD OF FUEL CELL SYSTEM AND FUEL CELL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a fuel cell system and its stopping method for preventing the freezing of a reforming device by a simple structure.

SOLUTION: The fuel cell system is provided with a reforming device 20 for producing reformed gas from fuel gas and vapor supplied and supplying the reformed gas to a fuel cell 10. The reforming device 20 is provided with an evaporation part 56 for producing vapor from water supplied from outside and supplying it to a reforming part 21. One end of a drain pipe 57 is connected to a water feed port of the evaporation part 56. A valve for drainage 58 is provided at the drain pipe 57 which is closed during the operation of the fuel cell system and opened at the stopping of the operation of the system.

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