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Thermodynamic Evaluation of Advanced Combined Cycle Using Latest Gas Turbine

[+] Author Affiliations
Sanjay, B. N. Prasad

National Institute of Technology – Jamshedpur, Jamshedpur, India

Onkar Singh

Harcourt Butler Technological Institute – Kanpur, Kanpur, India

Paper No. GT2003-38096, pp. 95-101; 7 pages
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 3: Turbo Expo 2003
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3686-X | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME


The present work deals with the thermodynamic evaluation of combined cycle with re-heat in gas turbine using the latest gas turbines namely ABB GT26 gas turbine (advanced) in which reheat is used and the blade cooling is done by air bled from compressor. The same turbine is subjected to closed loop steam cooling. Parametric study has been performed on plant efficiency and specific work for various independent parameters such as turbine inlet temperature, compressor pressure ratio, reheating pressure ratio, reheater inlet temperature, blade temperature, etc.. It has been observed that due to higher compressor pressure ratio involved in reheat gas turbine combined cycle and higher temperature of exhaust, the plant efficiency and specific work are higher with the advanced reheat gas/steam combined cycle over the simple combined cycle. Steam cooling offers better performance over aircooling.

Copyright © 2003 by ASME
Topics: Gas turbines , Cycles



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