| 摘要 |
PURPOSE:To keep cell temperature during off-operation more than a freezing point without requiring a separate power source, by letting fuel of methanol, natural gas, etc., available for a fuel cell as a heat source for hot insulation, react in contact combustion, and transmitting the produced heat to a cell stack via a heat-transfer body to be housed in a space in a hermetically sealed vessel. CONSTITUTION:A fuel cell stack 2 having a fuel inlet pipe 3a and its outlet pipe 3b, an air inlet pipe 4a and its outlet pipe 4b as well as a catalyzer inlet pipe 5a and its outlet pipe 5b at both sides respectively is housed in a hermetically sealed vessel 1 as projecting these pipes outside of the vessel 1. Next, a heat-transfer body 8 is set up at the lower side of the stack 2, situating this radiation fin 7 at the lower side of the stack 2, and the part not fitted with this fin 7 is projected outside of the vessel 1, surrounding it with a catalytic burner 9. In addition, a temperature sensor 12 is stuck to a surface of the stack 2 on the fin 7, while a valve 11 at the side of this burner 9 is operated via an interconnecting pipe 13, and when there is a fear of freezing, methanol out of a tank 10 is burned by the burner 9 and the stack 2 is warmed up via the fin 7. |
