Patent ID: 6497101
Filing Date: 2002-12-24
Classification: F01K,Y02E

Abstract:
A method for regulating a steam temperature in a combined-cycle power plant under part load, comprising:providing a combined cycle power plant having a water/steam circuit including a fired boiler, a steam turbine connected to a steam output of the fired boiler, and a heater for superheating or reheating steam generated in the fired boiler to form live steam or reheater steam arranged between the fired boiler and an input of the steam turbine, a gas turbine set including a gas turbine, and a heat recovery steam generator arranged at a hot gas output of the gas turbine and connected to the water/steam circuit in such a way that steam generated in the heat recovery steam generator is admixed with the live steam or reheater steam; regulating a temperature of the steam generated in the heat recovery steam generator to a temperature different than a temperature of the live steam or reheater steam; and admixing the live steam or reheater steam with the steam generated in the heat recovery steam generator to regulate the temperature of the live steam or reheater steam.