METHOD OF SHUTTING DOWN SOLID POLYMER FUEL CELL COGENERATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a method of shutting down a system which prevents condensation in a fuel cell stack after shifting to stopping steps and eliminates causes of clogging water at following starting up and can keep good battery property for long time.

SOLUTION: A dew point controlling step of reducing the dew point of reactant gas and/or air led into the fuel cell stack 1 lower than the dew point during the time of power generation and a temperature controlling step of reducing the temperature of the fuel cell stack 1 lower than the temperature during the time of power generation are performed before processes are shifted from a power generation process with a solid polymer electrolyte film type fuel cell stack 1 to a process of stopping power generation.

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