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Abstract

Techniques suitable for recovering energy from a high-temperature gas of an ordinary pressure are provided. A turbomachine has a turbine 16 and compressors 20 and 24. A combustor 12 is disposed at a stage above the turbine 16. A power generating system generates power by passing a working fluid for the turbomachine through the combustor 12, the turbine 16 and the compressors 20 and 24 in that order. An atmospheric pressure combustion turbine system includes: a regenerative heat exchanger 14 capable of cooling a high-temperature working gas discharged from the turbine 16 by making the high-temperature working gas exchange heat with a mixed gas produced by mixing an exhaust gas and air and moistened with hot water; coolers 22 and 26 connected to the entrance of the compressors 20 and 24, respectively, to cool the working gas by making the working gas exchange heat with water; and a humidifier 30 for producing a mixed gas by heating air by mixing part of the exhaust gas discharged from the compressor 24 in the air and humidifying the heated air with the hot water produced by heating water by the heat of the working gas through heat exchange. The mixed gas produced by the humidifier is supplied to the regenerative heat exchanger 14, the regenerative heat exchanger 14 produces a high-temperature, humid, mixed gas by making the mixed gas exchange heat with the high-temperature working gas discharged through the exit of the turbine 16 to heat the mixed gas, and the heated, high-temperature, humid, mixed gas is supplied to the combustor 12.

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First Claim