FIELD: power industry.
SUBSTANCE: invention relates to power industry. An operating method of a combined-cycle plant (CCP) is provided by designing of an after-heating heat exchanger for cooling of a steam-gas mixture at the high pressure turbine outlet in the form of two in-series located heat exchangers with the corresponding redistribution of flows of heated water, from which cooling water vapour is generated. CCP operating method involves an arrangement system of steam closed and open cooling of hot elements of a flow part of the gas turbine. Besides, CCP operating method provides for operation in a heat-extraction mode with simultaneous generation of electrical and heat energy.
EFFECT: invention allows improving operating efficiency of the plant.
4 cl, 4 dwg
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