FIELD: heat power engineering; power engineering.
SUBSTANCE: invention can be used in development of power CCGT units for production of electric energy at thermal power plants. Combined cycle gas turbine with a waste heat boiler and high and low pressure instant boiling evaporators comprises expansion stages in a gas turbine plant, high and low pressure expansion stages in a steam turbine, high and low pressure steam superheaters, an economiser and a gas condensate heater in a waste heat boiler, wherein between condensate outlet in low-pressure instant boiling evaporator and gas heater of condensate in waste heat boiler there is a steam heater is arranged in the intermediate low pressure expansion stage of a steam turbine.
EFFECT: increased efficiency of combined cycle gas turbine due to usage of heat removed in water-to-water heat exchanger for steam heating in steam heater in intermediate stage of low pressure expansion of steam turbine.
1 cl, 1 dwg
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