Patent ID: 9046037
Filing Date: 2015-06-02
Classification: F01D,F01K,F02C,F05D,Y02E

Abstract:
1. A method for operating a combined cycle power plant, which plant has a gas turbine installation and a water-steam cycle, wherein the water-steam cycle is connected to the gas turbine installation by a waste heat steam generator and wherein the water-steam cycle includes at least one steam turbine and a condenser configured to condense the steam emerging from the at least one steam turbine, and wherein the condenser operates under vacuum, and wherein the gas turbine installation includes a compressor, a combustion chamber, and a turbine, and wherein, to cool the turbine of the gas turbine installation, air compressed at the compressor is removed, cooled in at least one cooler flowed through by water thus generating steam, and introduced into the turbine of the gas turbine installation, the method comprising: at least with the gas turbine installation running, and prior to or during the start-up of the water-steam cycle, pre-heating at least a portion of the gas turbine installation at a position inside the combined cycle power plant with waste heat contained in the steam generated in the at least one cooler; and wherein the pre-heating at least a portion of the gas turbine installation includes evacuating the condenser with steam generated in the at least one cooler.