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Elevation of Heat Rejection Temperature in Transcritical Condensing Cycles Using CO2+Propane Mixtures

[+] Author Affiliations
Pardeep Garg, Pramod Kumar, Kandadai Srinivasan, Pradip Dutta

Indian Institute of Science, Bangalore, Bangalore, KA, India

Paper No. GT2014-26928, pp. V03BT36A015; 9 pages
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 3B: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Supercritical CO2 Power Cycles; Wind Energy
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4566-0
  • Copyright © 2014 by ASME


In this paper, a detailed thermodynamic performance analysis of a transcritical condensing (TC) cycle is performed with pure CO2 and a blend of 48.5 % propane with 51.5 % CO2 as working fluids. A realistic thermodynamic model is used incorporating irreversibilities in turbo-machineries and heat exchangers. The Key finding is that the addition of propane elevates the heat rejection temperature, but does not impair any of the performance indicators. Such a fluid may be useful for power generation in concentrated solar power applications by using which a hike of up to 2 % can be realized in the thermal efficiency of a power plant.

Copyright © 2014 by ASME



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