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Étude on Gas Turbine Combined Cycle Power Plant: Next 20 Years

[+] Author Affiliations
S. Can Gülen

Bechtel Power Corporation, Frederick, MD

Paper No. GT2015-42077, pp. V003T08A003; 13 pages
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5667-3
  • Copyright © 2015 by ASME


In 1992, United States Department of Energy’s Advanced Turbine Systems program established a target of 60% efficiency for utility scale gas turbine power plants to be achieved by the year 2000. Although the program led to numerous technology breakthroughs, it took another decade for an actual combined cycle power plant with an H class gas turbine to reach (and surpass) the target efficiency.

Today, another target benchmark, 65% efficiency, circulates frequently in trade publications and engineering journals with scant support from existing technology, its development path as well as material limits, and almost no regard to theoretical (e.g., underlying physics) and practical (e.g., cost, complexity, reliability and constructability) concerns.

This paper attempts to put such claims to test and establish the room left for gas turbine combined cycle (GTCC) growth in the next two decades. The analysis and conclusions are firmly based on fundamental thermodynamic principles with carefully and precisely laid out assumptions and supported by rigorous calculations. The goal is to arm the practicing engineer with a consistent, coherent and self-standing reference to critically evaluate claims, predictions and other futuristic information pertaining to GTCC technology.

Copyright © 2015 by ASME



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