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Feasibility Study of Low Grade Heat Recovery Rankine Cycle Using Ozone-Neutral Refrigerant

[+] Author Affiliations
W. Wayne Husband, Asfaw Beyene

San Diego State University, San Diego, CA

Paper No. GT2008-51537, pp. 371-376; 6 pages
  • ASME Turbo Expo 2008: Power for Land, Sea, and Air
  • Volume 7: Education; Industrial and Cogeneration; Marine; Oil and Gas Applications
  • Berlin, Germany, June 9–13, 2008
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4317-8 | eISBN: 0-7918-3824-2
  • Copyright © 2008 by ASME


The paper addresses the feasibility of ozone-neutral low grade heat recovery to produce power. The low grade heat source can either be industrial exhaust or solar radiation. Using a scroll expander as a basis for testing, theoretical models yielded a thermal efficiency of 11%, utilizing a non-toxic and non-hazardous working fluid. This project spanned research and development of a system from the comparison of several working fluids, modeling of a theoretical 10 kW unit, the sizing and selection of appropriate system components, and the development of project management tools, in support of its real world development. A cost benefit analysis of the theoretical system shows that solar heat recovery with ozone-neutral refrigerant is a viable option for power generation, at about 1/3 the cost of a comparable photovoltaic system.

Copyright © 2008 by ASME



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