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Energies 2017, 10(1), 94; doi:10.3390/en10010094

Performance Evaluation of a Solar-Powered Regenerative Organic Rankine Cycle in Different Climate Conditions

Department Mechanical Engineering, Mississippi State University, Starkville, MS 39762, USA
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Academic Editor: Roberto Capata
Received: 10 October 2016 / Revised: 5 December 2016 / Accepted: 10 January 2017 / Published: 13 January 2017
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Abstract

A model to evaluate the performance of a solar powered regenerative Organic Rankine Cycle (R-ORC) using five dry organic fluids: RC318, R227ea, R236ea, R236fa, and R218, is presented in this paper. The system is evaluated in two locations in the U.S.: Jackson, MS and Tucson, AZ. The weather data for each location is used to determine the heat available from the solar collector that could be used by the R-ORC to generate power. Results from the R-ORC performance are compared with a basic ORC using first and second law criteria as well as primary energy consumption (PEC) and carbon dioxide emission (CDE) savings for both locations. An economic analysis to determine the maximum capital cost for a desired payback period is presented in this paper. A parametric analysis is also performed to study the effect of the turbine efficiency as well as the open feed organic fluid heater intermediate pressure on the system performance. Results indicate that the R-ORC is able to generate more power than the basic ORC for some of the selected working fluids. For the R-ORC, R236ea is the working fluid that show the best performance among the evaluated fluids under the modeled conditions. On the other hand, the basic ORC with R236ea as the working fluid outperformed three of the fluids in the R-ORC. Also, the R-ORC evaluated in Tucson, AZ is able to generate more power, to provide more PEC and CDE savings, and had a higher available capital cost than the R-ORC evaluated in in Jackson, MS. View Full-Text
Keywords: solar ORC; regenerative ORC; Organic Rankine Cycle; primary energy consumption; carbon dioxide emissions solar ORC; regenerative ORC; Organic Rankine Cycle; primary energy consumption; carbon dioxide emissions
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Spayde, E.; Mago, P.J.; Cho, H. Performance Evaluation of a Solar-Powered Regenerative Organic Rankine Cycle in Different Climate Conditions. Energies 2017, 10, 94.

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