Patent ID: 8794008
Filing Date: 2014-08-05
Classification: F02C,F23C,F23N,F23R,Y02E

Abstract:
1. A method for the low-CO emissions operation of a gas turbine with sequential combustion, wherein the gas turbine includes a first turbine, a second turbine, at least one compressor wherein the at least one compressor includes a row of variable inlet guide vanes, a first combustor which is connected downstream to the compressor and the hot gases of which first combustor are admitted to the first turbine, and a second combustor which is connected downstream to the first turbine and the hot gases of which are admitted to the second turbine, the second combustor including operative burners each having an air ratio (λ), the method comprising: maintaining the air ratio (λ) of the operative burners of the second combustor below a maximum air ratio (λ shutting off a fuel feed to at least one burner of the second combustor at part load so that, with an unaltered turbine inlet temperature of the second turbine (TIT expanding a partial flow of at least partially compressed compressor air to form an expanded partial flow; and adding said expanded partial flow to an air intake of the compressor.