| 摘要 |
A fuel cell unit of a fuel cell module includes a fuel cell stack, a reformer, an evaporator, an exhaust gas combustor, a start-up combustor, and an air preheater. The fuel cell module further includes an air supply channel, a first fuel supply channel, a second fuel supply channel, a switching valve, and an exhaust gas channel. In the exhaust gas channel, the start-up combustor and the air preheater are arranged in the order recited toward the downstream side in a flow direction of a combustion exhaust gas. |
| 主权项 |
1. A fuel cell module comprising:
a fuel cell stack comprising a plurality of fuel cells stacked, the fuel cells being configured to generate electrical energy by electrochemical reactions of a fuel gas and an oxygen-containing gas; a reformer configured to reform raw fuel chiefly containing hydrocarbon to thereby produce the fuel gas supplied to the fuel cell stack; an evaporator configured to evaporate water and supply water vapor to the reformer; an exhaust gas combustor configured to combust 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 a combustion exhaust gas; a start-up combustor configured to combust the raw fuel and the oxygen-containing gas to thereby produce a combustion gas; and an air preheater configured to heat the oxygen-containing gas by heat exchange with one of the combustion gas and the combustion exhaust gas and supply the heated oxygen-containing gas to the fuel cell stack, wherein the fuel cell module further comprises: an oxygen-containing gas supply channel configured to supply the oxygen-containing gas to the air preheater and thereafter supply the oxygen-containing gas from the air preheater to the fuel cell stack; a first fuel supply channel configured to supply the raw fuel to the start-up combustor; a second fuel supply channel configured to supply the raw fuel to the evaporator and thereafter supply the raw fuel from the evaporator to the reformer; a channel switching unit configured to selectively supply the raw fuel to either one of the first fuel supply channel and the second fuel supply channel; a reactant exhaust gas channel configured to supply the fuel exhaust gas and the oxygen-containing exhaust gas discharged from the fuel cell stack, to the exhaust gas combustor; and an exhaust gas channel extending from a combustion exhaust gas outlet of the exhaust gas combustor, wherein in the exhaust gas channel, the start-up combustor and the air preheater are arranged in an order of the start-up combustor and then the air preheater toward downstream side in a flow direction of the combustion exhaust gas. |
