Patent ID: 7373773
Filing Date: 2008-05-20
Classification: F01D,F02C,Y02T

Abstract:
1. A gas turbine installation comprising: a compressor for compressing intake air; a combustor for burning compressed air introduced from said compressor; a turbine for producing torque of a turbine rotor by combustion gas introduced from said combustor; an exhaust casing connected to the downstream side of said turbine and made up of an outer casing and an inner casing; an exhaust diffuser connected to a combustion gas outlet of said turbine and made up of an outer diffuser and an inner diffuser, which are disposed between said outer casing and said inner casing, said exhaust diffuser acting to restore static pressure of the combustion gas introduced from said turbine; a strut for coupling said outer casing and said inner casing to each other; a strut cover for coupling said outer diffuser and said inner diffuser to each other in a covering relation to said strut; a first cooling system for taking in cooling air extracted from said compressor to a space between said outer casing and said outer diffuser, and introducing the cooling air to the inner peripheral side of said inner diffuser via a space between said strut and said strut cover; and a second cooling system partitioned from said first cooling system and introducing, as cooling air for cooling said inner casing, the atmosphere from the inner peripheral side of said inner diffuser.