초록 ▼

A combined cycle power plant comprises a gas turbine system and a steam cycle system having a steam turbine to be driven by the steam generated by the waste heat of the exhaust gas of the gas turbine system, wherein the steam from the steam cycle system flows through a gas turbine cooling system of

A combined cycle power plant comprises a gas turbine system and a steam cycle system having a steam turbine to be driven by the steam generated by the waste heat of the exhaust gas of the gas turbine system, wherein the steam from the steam cycle system flows through a gas turbine cooling system of the gas turbine to cool the gas turbine blades and other elements of the gas turbine system to be cooled and the waste heat of the gas turbine system is effectively collected. The gas turbine cooling system has two or more than two cooling ducts formed in two or more than two elements of the gas turbine system to be cooled such as the gas turbine blades and the combustor of the gas turbine system so that steam is made to flow through the cooling ducts of these two or more than two elements to be cooled to effectively and maximally exploit the cooling potential and the waste heat collecting potential of the steam and hence improve the overall thermal efficiency of the plant.

대표청구항 ▼

[ What is claimed is:] [1.] A combined cycle power plant comprising:a gas turbine system configured to generate exhaust, comprising,turbine blades, anda combustor;a waste heat collector boiler configured to collect waste heat of said exhaust and to generate steam;a steam cycle system including a ste

[ What is claimed is:] [1.] A combined cycle power plant comprising:a gas turbine system configured to generate exhaust, comprising,turbine blades, anda combustor;a waste heat collector boiler configured to collect waste heat of said exhaust and to generate steam;a steam cycle system including a steam turbine driven by said steam of said waste heat collector boiler, configured to generate a steam and water mixture; anda gas turbine cooling system configured to feed in series at least part of said steam and water mixture to a cooling duct formed in said combustor after said steam and water mixture passes through a cooling duct formed in said turbine blades.