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GT Prime: Improvements to General Electric MS7001B Gas Turbines FREE

[+] Author Affiliations
Edward M. Fuselier

Houston Lighting and Power Company, Houston, TX

David K. Prugger

General Electric Company, Schenectady, NY

Paper No. 94-GT-491, pp. V004T10A029; 6 pages
doi:10.1115/94-GT-491
From:
  • 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

abstract

The eight General Electric MS7001B gas turbines in combined cycle service at the T.H. Wharton Station of Houston Lighting and Power currently have 85000 hours of operation with 2000 starts. The units are ready for their second major overhaul. A number of hot gas path components will require replacement at that time. Rather than replacing components one by one the user devised a Program for Reliability, Improved Maintenance and Efficiency (GT Prime) with an objective of achieving twenty additional years of trouble free service. Fortunately, the supplier had developed many improved parts for his newer units which could be applied to older machines with an attendant increase in component life, inspection intervals, system reliability, availability and performance. The significant impact on customer operating costs resulted in a very attractive payback period.

A contract for modification of all eight units was signed in December, 1991. Teardown of the first unit for modification started in November, 1992 with the rebuild and test completed in July, 1993.

This paper will discuss turbine condition, differences between the old and new parts, improved performance and reduced emissions attained as a result of implementing the program.

Copyright © 1994 by ASME
Topics: Gas turbines
This article is only available in the PDF format.

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