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 having a gas turbine;a waste heat collector boiler and high pressure drum for collecting the waste heat of the exhaust of the gas turbine;a steam cycle system having a steam turbine to be driven by the steam gen

[ What is claimed is:] [1.] A combined cycle power plant comprising:a gas turbine system having a gas turbine;a waste heat collector boiler and high pressure drum for collecting the waste heat of the exhaust of the gas turbine;a steam cycle system having a steam turbine to be driven by the steam generated by the waste heat collector boiler and condenser; anda gas turbine cooling system for feeding at least part of at least one of the steam and water generated in said steam cycle system into said gas turbine system and returning them into said steam cycle system, wherein:said gas turbine cooling system is provided with a cooling duct formed in two or more than two elements of said gas turbine system to be cooled and said at least one of steam and water is made to flow through said two or more than two elements, and at least one of the steam and water fed from said stream cycle system to said turbine cooling system is supplied from the waste heat collector boiler and the high pressure drum and one of the steam and water returned from the turbine cooling system to the steam cycle system is specifically returned to at least one of the waste heat collector boiler, the high pressure drum and the condenser of the steam cycle system.