Repowering of a Small Utility: A Unique Solution to a Unique Problem PUBLIC ACCESS

[+] Author Affiliations
L. F. Fougere

Fern Engineering Co., Inc., Bourne, MA

H. G. Stewart

Citizens Utilities Co., Stamford, CT

J. Bell

John Brown Engineering, Clydebank, Scotland

Paper No. 79-GT-15, pp. V01AT01A015; 8 pages
  • ASME 1979 International Gas Turbine Conference and Exhibit and Solar Energy Conference
  • Volume 1A: Gas Turbines
  • San Diego, California, USA, March 12–15, 1979
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7967-2
  • Copyright © 1979 by ASME


Citizens Utilities Company’s Kauai Electric Division is the electric utility on the Island of Kauai, fourth largest and westernmost as well as northernmost of the Hawaiian Islands. As a result of growing load requirements, additional generating capacity was required that would afford a high level of reliability and operating flexibility and good fuel economy at reasonable capital investment. To meet these requirements, a combined cycle arrangement was completed in 1978 utilizing one existing gas turbine-generator and one new gas turbine-generator, both exhausting to a new heat recovery steam generator which supplies steam to an existing steam turbine-generator. Damper controlled ducting directs exhaust gas from either gas turbine, one at a time, through the heat recovery steam generator. The existing oil-fired steam boiler remains available to power the steam turbine-generator independently or in parallel with the heat recovery steam generator. The gas turbines can operate either in simple cycle as peaking units or in combined cycle, one at a time, as base load units. This arrangement provides excellent operating reliability and flexibility, and the most favorable economics of all generating arrangements for the service required.

Copyright © 1979 by ASME
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