Patent ID: 6393826
Filing Date: 2002-05-28
Classification: F02C

Abstract:
A gas turbine, having a cooling air system supplying air for cooling a high-temperature part of said gas turbine and a spray air system supplying air for spraying fuel into a combustor, and formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air for said cooling air system and said spray air system,wherein a heat exchanger and a boost compressor are arranged downstream of an outlet side of compressed air of said gas turbine compressor, and said boost compressor is composed of a first compressor driven by a turbine shaft and a second compressor driven by a drive source other than said turbine shaft, said first and second compressors forming said boost compressor being fluidly connected in parallel downstream of said heat exchanger, said first and second compressors having, respectively, first and second parallel flow paths which are fluidly connected to each other downstream of the first and second compressors such that pressurized air from said boost compressor is used as air for said cooling air system and said spray air system.