Thermodynamical Optimization of a Combined Cycle Plant Performance FREE

[+] Author Affiliations
K. Sarabchi

University of Tabriz, Tabriz, Iran

G. T. Polley

UMIST, Manchester, UK

Paper No. 94-GT-304, pp. V004T10A007; 10 pages
  • ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration
  • The Hague, Netherlands, June 13–16, 1994
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7886-6
  • Copyright © 1994 by ASME


Computer modelling of Performance optimization was done to examine the effect of key operating variables like compressor pressure ratio, turbine inlet temperature, and recovery boiler pressure on performance parameters of a simple combined cycle and comparison was made to a simple gas turbine cycle. Both thermal efficiency and specific net work were examined as pressure ratio and recovery boiler pressure were varied for each turbine inlet temperature. Also careful consideration was given to admissible values of stack gas temperature, steam turbine outlet dryness fraction, and steam turbine outlet dryness fraction, and steam turbine inlet temperature.

Specifically, it was shown that when we treat a combined cycle as an integrated system, efficiency optimization entails a pressure ratio below that suitable for simple gas turbine plant.

Copyright © 1994 by ASME
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