Fuel cell module

摘要

A fuel cell module includes a first area where an exhaust gas combustor and a start-up combustor are provided, an annular second area disposed around the first area where a heat exchanger is provided, an annular third area disposed around the second area where a reformer is provided, and an annular fourth area disposed around the third area where an evaporator is provided. In the first area, the exhaust gas combustor and the start-up combustor are provided coaxially in the same space.

主权项

1. A fuel cell module comprising:
a fuel cell stack formed by stacking fuel cells for generating electricity by electrochemical reactions between a fuel gas and an oxygen-containing gas; a reformer for reforming a mixed gas of water vapor and a raw fuel chiefly containing hydrocarbon to produce the fuel gas supplied to the fuel cell stack; an evaporator for evaporating water, and supplying the water vapor to the reformer; a heat exchanger for raising temperature of the oxygen-containing gas by heat exchange with combustion gas, and supplying the oxygen-containing gas to the fuel cell stack; an exhaust gas combustor for combusting the fuel gas discharged from the fuel cell stack as a fuel exhaust gas and the oxygen-containing gas discharged from the fuel cell stack as an oxygen-containing exhaust gas to thereby produce the combustion gas; and a start-up combustor for combusting the raw fuel and the oxygen-containing gas to thereby produce the combustion gas, the fuel cell module further comprising: a first area where the exhaust gas combustor and the start-up combustor are provided; an annular second area disposed around the first area where one of the reformer and the heat exchanger is provided; an annular third area disposed around the second area where another of the reformer and the heat exchanger is provided; an annular fourth area disposed around the third area where the evaporator is provided; wherein in the first area, the exhaust gas combustor and the start-up combustor are provided separately from each other and coaxially with each other in the same space.