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Zeotropic mixtures in low temperature Rankine cycles.

Number: 1164

Author(s) : SHAHROOZ M., LUNDQVIST P., NEKSÅ P.

Summary

Compared to pure fluids, zeotropic mixtures have the potential to lower the irreversibilities in low temperature Rankine cycles by better temperature profile matching of the working fluid with the heat source/sink. However, having a gliding temperature does not guarantee performance boost over pure fluids, as many factors influence the exergy efficiency of the cycle. In this paper, different behaviors of binary zeotropic mixtures of natural refrigerants are analyzed with respect to their pure constituents in subcritical low temperature Rankine cycles. In one behavior type, the performance of the mixture falls between the performance of its pure constituents for all evaporator pressure range, and the mixture provides no benefit. However, some mixtures could provide performance boost in a specific evaporator range. Therefore, the maximum allowable evaporator pressure plays an important role in performance comparison of zeotropic mixtures with their pure constituents.

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Zeotropic Mixtures in Low Temperature Rankine Cycles

Pages: 6

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Details

  • Original title: Zeotropic mixtures in low temperature Rankine cycles.
  • Record ID : 30027937
  • Languages: English
  • Subject: Technology
  • Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Publication date: 2020/12/07
  • DOI: http://dx.doi.org/10.18462/iir.gl.2020.1164

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