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Extending Useful Life of F-Class Gas Turbine Components

[+] Author Affiliations
John R. Scheibel

Electric Power Research Institute, Palo Alto, CA

Rajeev Aluru

Progress Energy Carolinas, Inc., Raleigh, NC

Paper No. GT2012-68363, pp. 569-576; 8 pages
doi:10.1115/GT2012-68363
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 3: Cycle Innovations; Education; Electric Power; Fans and Blowers; Industrial and Cogeneration
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4469-4
  • Copyright © 2012 by ASME

abstract

This paper addresses the engineering evaluation of F-Class hot section components from an owner/operator perspective, with the practical objective of extending their interval of useful service beyond the limits recommended by the OEM. Starting with the first stage, the initial aim is to extend operation from two to three intervals. A multi-disciplinary approach to hot section life management is described, which is used to assess the component condition and possible risks involved with extending the active service life. The assessment draws from many sources: design analysis (durability, weak points, material and coating limitations), inspection (when, where, limits and tolerances), service (base load, cycling, turbine inlet temperature and hours) and repair techniques (welding, brazing, heat treatments). Results of the modeling, damage tracking, NDT and metallurgical and mechanical testing are summarized.

Copyright © 2012 by ASME

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