FIELD: engines and pumps.
SUBSTANCE: invention relates to electric power engineering and can be used at thermal electric power stations. Proposed gas-expansion machine comprises gas main pipeline, gas control station, turbo-expander, and turbo-expander feed and exhaust gas pipelines. Turbo-expander feed pipeline is connected to heated circuit of the first-stage intermediate air cooler arranged between low-pressure and medium-pressure compressors of gas-turbine unit three-stage compressor. Turbo-expander exhaust pipeline communicates with second-stage air cooler heated circuit arranged between medium- and high-pressure compressors of gas turbine unit three-stage turbo compressor.
EFFECT: higher efficiency.
2 cl, 1 dwg
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