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The Single-Shaft Combined Cycle Myth

[+] Author Affiliations
Ram G. Narula

Bechtel Power Corporation, Frederick, MD

Paper No. 2000-GT-0594, pp. V003T02A020; 8 pages
  • ASME Turbo Expo 2000: Power for Land, Sea, and Air
  • Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Munich, Germany, May 8–11, 2000
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7856-9
  • Copyright © 2000 by ASME


Natural-gas-fired combined cycle plants have become the preferred technology for new power generation because of their high thermal efficiency and superior environmental characteristics. An outcome of the recent resurgence in the U.S. power market is that the average size of the new power plant has increased, leading to the use of two or three advanced gas turbines (GTs) per plant. In lieu of the traditional multishaft arrangement, some GT suppliers are advocating the use of multiple trains of their single-shaft reference plants. This paper covers salient differences between the two approaches and discusses at length the major variables and their impact on balance-of-plant cost that must be carefully examined for a cost-effective solution.

Copyright © 2000 by ASME



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