Analyses of gas turbine plant performance, including the effects of turbine cooling, are presented. The thermal efficiencies are determined theoretically, assuming air standard (a/s) cycles, and the reductions in efficiency due to cooling are established; it is shown that these are small, unless large cooling flows are required. The theoretical estimates of efficiency reduction are compared with calculations, assuming that real gases form the working fluid in the gas turbine cycles. It is shown from a/s analysis that there are diminishing returns on efficiency as combustion temperature is increased; for real gases there appears to be a limit on this maximum temperature for maximum thermal efficiency.
The Basic Thermodynamics of Turbine Cooling
Contributed by the International Gas Turbine Institute for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received at ASME Headquarters March 2000. Associate Editor: T. H. Okiishi.
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Horlock, J. H. (March 1, 2000). "The Basic Thermodynamics of Turbine Cooling ." ASME. J. Turbomach. July 2001; 123(3): 583–592. https://doi.org/10.1115/1.1370156
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