Fuel cell stack with variable heat capacity

摘要

In starting power generation under low temperature conditions, an antifreeze liquid being coolant of a cooling system 13 in a fuel cell stack 1 is once recovered in a tank 136 to reduce heat capacity of the fuel cell stack 1, and thereafter the power generation is started. Heat of reaction caused by the power generation restores the temperature to temperature under normal operation, and then the antifreeze liquid is again filled to drive the cooling system 13, so as to make it function as a cooler.