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Performance of a 5kWe Organic Rankine Cycle at part-load operation

Author

Listed:
  • Ibarra, Mercedes
  • Rovira, Antonio
  • Alarcón-Padilla, Diego-César
  • Blanco, Julián

Abstract

This paper analyzes the performance of an Organic Rankine Cycle (ORC) system at part load operation. The objective is to understand its behavior from a thermodynamic perspective, identifying which elements are the most critical and which are the best operating points for each level of demanded power. This paper also compares two working fluids: R245fa and Solkatherm ES36 (SES36) for the same cycle specifications. The results have shown that the scroll isentropic efficiency has a great influence on the cycle performance and its thermal efficiency and that SES36 arises as a potential better fluid than R245fa. At the given maximum and minimum temperatures, the best operation point was determined. This allows reaching a maximum efficiency for each demanded level of power; depending on the required amount of power, the expander speed and the working pressure are adjusted.

Suggested Citation

  • Ibarra, Mercedes & Rovira, Antonio & Alarcón-Padilla, Diego-César & Blanco, Julián, 2014. "Performance of a 5kWe Organic Rankine Cycle at part-load operation," Applied Energy, Elsevier, vol. 120(C), pages 147-158.
  • Handle: RePEc:eee:appene:v:120:y:2014:i:c:p:147-158
    DOI: 10.1016/j.apenergy.2014.01.057
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    References listed on IDEAS

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