METHOD OF COMBINED GENERATING ELECTRIC POWER, HEAT AND COLD IN COMBINED-CYCLE PLANT WITH STEAM INJECTION AND COMBINED-CYCLE PLANT FOR ITS IMPLEMENTATION

摘要

FIELD: power engineering.;SUBSTANCE: invention relates to power engineering and can be used in designing new and improving existing combined-cycle plants (CCP) of contact type (CCP-C) intended for generating electric power and heat, as well as a power drive, for example, for compressors of gas-compressor stations of gas mains. Method of combined generating electric power, heat and cold in a combined-cycle plant with steam injection involves air compression in a multistage compressor with intermediate cooling air with heated water in a contact heat exchanger. Supply of a compressed steam-air mixture into the combustion chamber of the gas turbine with injection of additional steam produced in the exhaust-heat boiler. Expansion of the steam-gas mixture in the high-pressure turbine. Cooling the steam-gas mixture in the exhaust-heat boiler and in the gas cooler for heating delivery water of the heat and cold water supply system due to heat of steam condensation from the steam-gas mixture. System of condensed moisture removal from the steam-gas mixture, further delivery of dried steam-gas mixture into the expander while collecting the formed condensate and returning it into the steam-gas cycle. Pressure behind the high pressure-turbine is maintained at the level of 0.35-0.5 MPa, sufficient for heating the circulating water in the heat and cold water supply system up to the temperature of 100–110 °C.;EFFECT: simpler technique of combined generating power, heat and cold, implementation of potential condensation of water vapours at a temperature level sufficient for heating the delivery water up to standard parameters of the heating system.;5 cl, 1 dwg