Solid electrolyte fuel cell system

摘要

A solid electrolyte fuel cell system includes a reformer to produce a hydrogen-rich reformed gas from fuel, oxygen and water, and a stack structure including a stack of fuel cell units each receiving supply of the reformed gas and air, and producing electricity. The fuel cell system further includes a reformed gas cooler to cool the reformed gas supplied from the reformer to the stack structure, and a temperature control section to control operation of the reformed gas cooler in accordance with an operating condition such as a request output of the stack structure. The reformed gas cooler includes a device such as a heat exchanger for cooling the reformed gas with a coolant such as air.

主权项

1. A solid electrolyte fuel cell system comprising:
a reformer to produce a hydrogen-rich reformed gas from fuel, oxygen and water; a stack structure including a stack of fuel cell units each receiving air and the reformed gas, and producing electricity; a reformed gas cooler to cool the reformed gas supplied from the reformer to the stack structure; and a temperature control section to control operation of the reformed gas cooler; wherein the temperature control section comprises a temperature controller to control the reformed gas cooler in accordance with a request output for the stack structure, the temperature controller being programmed to ascertain the request output for the stack structure, a temperature of the stack structure, and a heat quantity of the reformed gas; examine whether an attainment temperature of the stack structure is within an allowable range; if the attainment temperature is not within the allowable range,
calculate a heat decrease quantity of the reformed gas;calculate a desired coolant flow rate that is a desired air flow rate of coolant supplied to a heat exchanger from the calculated heat decrease quantity and a heat exchange capability of the heat exchanger; andsupply the reformed gas to the stack structure and coolant to the heat exchanger.