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A Study of Cycle Performance of Ceramic Gas Turbines FREE

[+] Author Affiliations
H. Sugishita, H. Mori

Mitsubishi Heavy Industries Ltd, Takasago, Hyogo, Japan

R. Chikami, Y. Tsukuda

Mitsubishi Heavy Industries Ltd, Japan

S. Yoshino, T. Tsuchiya, Y. Furuse

Tokyo Electric Power Company, Yokohama, Japan

Paper No. 97-GT-492, pp. V002T08A018; 8 pages
doi:10.1115/97-GT-492
From:
  • ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Orlando, Florida, USA, June 2–5, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7869-9
  • Copyright © 1997 by ASME

abstract

A study has been carried out to assess the performance improvement of a combined cycle used for an industrial power plant when ceramic turbine components are employed. This paper presents the details of this study. Performance improvement is obtained as a result of reduced blade cooling air. In this study four different kinds of combined cycles were investigated and these are listed below:

A. Combined cycle with a simple gas turbine.

B. Combined cycle with an inter-cooled gas turbine.

C. Combined cycle with a reheat gas turbine.

D. Combined cycle with an inter-cooled reheat gas turbine.

Results of this study indicate that the combined cycle with a simple gas turbine is the most practical of the four cycles studied with an efficiency of higher than 60%. The combined cycle with reheat gas turbine has the highest efficiency if a higher compressor exit air temperature and a high gas temperature (over 1000°C) to reheat the combustion system are used. A higher pressure ratio is required to optimize the cycle performance of the combined cycle with the ceramic turbine components than that with the metal turbine components because of reduced blade cooling air. To minimize leakage air for these higher pressure ratios, advanced seal technology should be applied to the gas turbines.

Copyright © 1997 by ASME
This article is only available in the PDF format.

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