| 摘要 |
To maximise the efficiency of a combined gas-steam power plant consisting essentially of a fossil fuel gas turbine group and a steam circuit with an intermediate waste-heat boiler (11), an intercooling stage and an interheating stage are provided. The gas turbine group consists of two compressors (1, 2), two combustion chambers (7, 9) and two turbines (8, 10). Positioned downstream of the first compressor (1) is an intercooler (3) and positioned on the cooling side of the latter is an evaporator (4) in operative connection with it. The steam quantity formed in the evaporator (4) is fed into a turbine (6) of the steam circuit, resulting in the first improvement in efficiency. Provided downstream of the first turbine (8) is a second combustion chamber (9), in which the exhaust gases from the first turbine (8) are converted into heating gases for the second turbine (10). The exhaust gases from this second turbine (10) with their large remaining caloric potential flow through the waste-heat boiler (11), in which a maximised steam generating capacity is provided, resulting in the second improvement in efficiency.
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