A SOLID OXIDE FUEL CELL SYSTEM

摘要

A solid oxide fuel cell system (10) comprises a solid oxide fuel cell stack (12) and a gas turbine engine (14), a compressor (24) of the gas turbine engine (14) is arranged to supply oxidant to the cathodes (22) of the solid oxide fuel cell stack (12) and a fuel supply (32) is arranged to supply fuel to the anodes (20) of the solid oxide fuel cell stack (12). A portion of the unused oxidant from the cathodes (22) of the solid oxide fuel cell stack (12) is supplied back to the cathodes (22) of the solid oxide fuel cell stack (12). A portion of the unused fuel from the anodes (20) of the solid oxide fuel cell stack (12) is supplied to a combustor (52). A portion of the unused oxidant from the cathodes (22) of the solid oxide fuel cell stack (12) is supplied to the combustor (52) and the combustor (52) is arranged to supply exhaust gases to a first inlet (68) of a heat exchanger (66). The heat exchanger (66) is arranged to supply a portion of the exhaust gases from a first outlet (72) of the heat exchanger (66) to a turbine (26) of the gas turbine engine (14). The portion of the oxidant from the compressor (24) and the unused oxidant from the cathodes (22) of the solid oxide fuel cell stack (12) are arranged to be supplied to a second inlet (78) of the heat exchanger (66). The heat exchanger (66) is arranged to supply the portion of the oxidant from the compressor (24) and the unused oxidant from the cathodes (22) of the solid oxide fuel cell stack (12) to the cathodes (22) of the solid oxide fuel cell stack (12) to preheat the oxidant supplied to the cathodes (22) of the solid oxide fuel cell stack (12).