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A Method to Evaluate the Heat Exchanger Retrofit for Industrial Gas Turbines Based on Technical and Economic Perspective

[+] Author Affiliations
Waleed Al-Busaidi, Pericles Pilidis

Cranfield University, Bedford, UK

Paper No. GT2016-56145, pp. V003T20A002; 16 pages
doi:10.1115/GT2016-56145
From:
  • ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
  • Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems
  • Seoul, South Korea, June 13–17, 2016
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4974-3
  • Copyright © 2016 by ASME

abstract

One way to enhance the thermal efficiency of simple gas turbines cycle is by using recuperation to recover some of the exhaust heat. Therefore, this study aims to introduce a new integrated approach to evaluate the techno-economic value of recuperator retrofit on existing industrial gas turbines. The original engines are designed for combined cycles so that the pressure ratios are moderate to secure suitable exhaust temperatures. The developed model is described and implemented for two gas turbines, and the obtained characteristics are evaluated against the actual data. This approach will help the users to select the suitable gas turbine models with favorable recuperator characteristics based on a technical and economic perspective. Besides, the performance results are used to select the optimum thermodynamic and geometrical characteristics of TEMA tubular heat exchanger so that the generated design alternatives are optimized using multi-decision process principle in order to ensure the highest techno-economic value. One of the unique features of the new method is that it depends only on the velocity of recuperator streams to derive the rest of the heat exchanger design and performance characteristics. Moreover, this paper includes a sensitivity study to investigate the effects of power setting, utilization factor and operation availability on the selected recuperator features.

Copyright © 2016 by ASME

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