Ensuring the efficiency of a gas turbine plant of a complex cycle with different heating in stages and air bleed for the cooling of the second combustion chamber

Abstract

The choice of the parameters of a gas turbine plant of a complex cycle with two-stage heating and compressor air bleed for the cooling of the second combustion chamber is considered using as an efficiency criterion the equality of the effective efficiencies of a simple and complex cycle with the dependence of the efficiency of a simple cycle on the degree of heating in the second stage. The decrease in the efficiency of a complex cycle as a result of the compressor cooling-air bleed with the dependence of the efficiency of a simple cycle on the degree of heating in the second stage is compensated due to an increase in the degree of heating in this stage compared to the first stage, at which the efficiency of a simple and complex cycle without coolingair bleed increases. As a result, the efficiency of a complex cycle with the bleed of a sufficient amount of cooling air also increases until it is equal to the efficiency of a complex cycle without cooling-air bleed with the decreased equal degree of heating in stages corresponding to the first stage and the economic degree of pressure increase dependent thereon