FIELD: power industry.
SUBSTANCE: invention relates to power engineering. In the method of operation of combined gas-turbine unit of gas distribution system at generation of electric energy by means of heat engine as a working body the low-boiling working body with the closed contour of circulation, working according to Renkin organic cycle, is used, the utilisation of heat of exhaust gases of the gas-turbine engine is performed by heating in the heat exchanger utilizer of the low-boiling working body, and the low-boiling working body of the closed circulation contour is compressed in the condensate pump, expanded in the turbine expander, condensed in the low-temperature heat exchanger capacitor, at generation of electric energy in the power utilisation turbine expander the turbine expander with separating unit for production of low-temperature natural gas is used, this low-temperature natural gas is supplied to the low-temperature heat exchanger capacitor for cooling of low-boiling working body of the heat engine, and condensate in the form of liquefied fraction of heavy hydrocarbons, which is supplied to the combustion chamber of the gas-turbine engine, and in during the process of condensation of the low-boiling working body the released hidden heat heats the low-temperature natural gas.
EFFECT: invention allows to increase efficiency of the combined gas-turbine unit.
2 cl, 2 dwg
