FIELD: power system; power engineering.
SUBSTANCE: invention relates to heat and power engineering. In the method of operation of the combined-cycle plant with a waste-heat boiler and evaporators of instantaneous boiling up of feed water, all feed water from the economizer is fed to the evaporator of instantaneous boiling up of high pressure. Resulting steam is superheated in a high-pressure superheater located first along the exhaust gas flow in the waste-heat boiler. Exhaust steam from the expansion stages of the high pressure steam turbine together with water from the evaporator instant boil high pressure is fed to the instant boil low pressure evaporator, water from it is pre-cooled in a heat exchanger before mixing with the condensate from the condenser, and the condensate obtained after mixing is heated in a gas condensate preheater.
EFFECT: invention allows to increase the efficiency of the combined-cycle plant.
1 cl, 2 dwg
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