Conceptual Engineering of a CRGT System for Exhaust Heat Recovery in an Existing Compressor Station FREE

[+] Author Affiliations
K. K. Botros, M. J. de Boer

NOVA Research & Technology Corporation, Calgary, AB, Canada

H. G. Fletcher

TransCanada Pipelines Ltd., Calgary, AB, Canada

Paper No. 99-GT-004, pp. V002T04A001; 9 pages
  • ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Indianapolis, Indiana, USA, June 7–10, 1999
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7859-0
  • Copyright © 1999 by ASME


Conceptual engineering design of a chemically recuperated gas turbine (CRGT) system was carried out for an existing GE-LM2500 based natural gas compressor station. The configured system was evaluated using the commercial process simulation software ASPEN PLUS®. The results of the thermodynamic assessment showed an increase in thermal efficiency from 34% to 38% and an increase of the site actual output power by 15% at full load and for the same mass flow of air through the gas turbine compressors. The mass flow rate through the combustor and turbines increases only by 5%, which can be accommodated with the existing driver hardware. The present paper provides equipment identification, costs and economic evaluation for this specific system. The water needed for the CRGT system was drawn from an aquifer source through two wells capable of a continuous combined throughput of 2.8 liters/s (i.e. ∼22 GPM each). Environmental assessment of the system showed that the equivalent CO2 emission at full load decreases from ∼ 600 kg/MW.hr to 520 kg/MW.hr (i.e., 13%). The overall system economics shows that a return on capital investment is attainable in 5 years.

Copyright © 1999 by ASME
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