초록 ▼

In a method of operating a power station plant, which essentially comprises a gas-turbine group, a waste-heat steam generator and a steam cycle, at least one portion of the steam (15, 29, 44) generated indirectly or directly in the waste-heat steam generator (14) is used for cooling thermally loaded

In a method of operating a power station plant, which essentially comprises a gas-turbine group, a waste-heat steam generator and a steam cycle, at least one portion of the steam (15, 29, 44) generated indirectly or directly in the waste-heat steam generator (14) is used for cooling thermally loaded structures of the gas-turbine group, this steam being at a varying preparation stage: the superheated steam (15) cools the structures (21, 25) on the high-pressure side, and the intermediate-pressure steam (29) and the flash steam (44) cool the structures (32, 36, 46) of the gas-turbine group which are on the low-pressure side. After cooling is effected, the respective cooling-steam quantity (22, 26; 33, 37) is directed into a working-air flow (3, 6; 8, 11) of the gas-turbine process.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of operating a power station plant, essentially comprising a gas-turbine group and a waste-heat steam generator arranged downstream of the gas-turbine group, the gas-turbine group comprising

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of operating a power station plant, essentially comprising a gas-turbine group and a waste-heat steam generator arranged downstream of the gas-turbine group, the gas-turbine group comprising at least one compressor unit, at least one combustion chamber, at least one turbine and at least one generator, and the exhaust gases from the at least one turbine in the gas turbine group flow through the waste-heat steam generator, in which the generation of at least two steam portions takes place, said method comprising the steps of:generating at least two portions of steam at different pressures in the waste-heat steam generator;directing each steam portion to a thermally loaded structure of the gas turbine group for cooling purposes; anddirecting each steam portion after cooling is effected, into a working fluid flow of the gas-turbine group wherein a highest pressure steam portion is directed into the working fluid flow closest to a first combustor of the gas-turbine group, and a lowest pressure steam portion is directed into the working fluid flow closest to an exhaust section of the gas-turbine group.