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Mechanical Design of Free Standing Exhaust Stacks for Offshore Applications FREE

[+] Author Affiliations
I. M. Allison

University of Surrey, Guildford, England

A. C. Steel

Altair Filters International Limited, Alton, Hampshire, England

Paper No. 92-GT-375, pp. V004T11A015; 8 pages
doi:10.1115/92-GT-375
From:
  • ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Cologne, Germany, June 1–4, 1992
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7896-5
  • Copyright © 1992 by ASME

abstract

This paper describes the methods developed to optimize the mechanical design of a free standing exhaust stack and its supporting structure. These particular methods have been used for the design of three gas turbine exhaust systems on a UK sector offshore platform currently under construction. The driving force behind the choice of a free standing stack was to save weight and therefore cost. The move towards the development of marginal fields in deeper waters will only increase the need for lighter, and therefore more cost effective design solutions.

Although national standards which cover the basic design philosophy are available, these have serious limitations when applied to this type of structure. The aim of this paper is to demonstrate how the limitations may be overcome by undertaking fundamental design analysis, and also to indicate those critical areas which demand special consideration. The detailed design analysis presented here considers the possibility of failure due to local instability, the effect on the dynamic response of the flexible foundation provided by the platform, and the determination of thermal stresses at critical locations.

Although this design has been developed for offshore use, the techniques utilized can be applied equally to onshore applications.

Copyright © 1992 by ASME
This article is only available in the PDF format.

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