SEQUENTIAL COMBUSTION ARRANGEMENT WITH COOLING GAS FOR DILUTION

摘要

A gas turbine with a sequential combustor arrangement as disclosed includes a first combustor with a first burner for admitting a first fuel into a combustor inlet gas during operation and a first combustion chamber for burning the first fuel, a dilution gas admixer for admixing a dilution gas to the first combustor combustion products leaving the first combustion chamber, a second burner for admixing a second fuel and a second combustion chamber. To assure a temperature profile after the dilution gas admixer and to increase the gas turbine's power and efficiency a vane and/or blade of the turbine has a closed loop cooling. The outlet of the closed loop cooling is connected to the dilution gas admixer for admixing the heated cooling gas leaving the vane and/or blade into the first combustor combustion products.

主权项

1. A gas turbine with a compressor, a turbine, and sequential combustor arrangement comprising:
a first combustor with a first burner for admitting a first fuel into a combustor inlet gas during operation and a first combustion chamber for burning the first fuel; a dilution gas admixer for admixing a dilution gas to the first combustor combustion products leaving the first combustion chamber; a second burner for admixing a second fuel and a second combustion chamber, wherein the first combustor, the dilution gas admixer, the second burner and second combustion chamber are arranged sequentially in a fluid flow connection; and a vane and/or blade of the turbine having a closed loop cooling which is connected to a compressor plenum for feeding compressed cooling fluid into the vane and/or blade and an outlet of the closed loop cooling being connected to the dilution gas admixer for admixing the heated cooling gas leaving the vane and/or blade into the first combustor combustion products.