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Liquid and vapour injection two-stage cycles in cascade configurations for ultra-low temperature refrigeration.

Number: 1104

Author(s) : MOTA BABILONI A., UDROIU C-M., NAVARRO-ESBRÍ J.

Summary

In the context of the COVID-19 health crisis, 80 °C refrigeration highlighted the need for energy-efficient and environmentally friendly freezers for preserving mRNA vaccines. Currently, these systems are transiting from R-404A/R-23 to R-290/R-170 basic two-stage cascade vapour compression systems without exploring the potential of low global warming potential working fluids in advanced configurations. This paper explores the potential of liquid and vapour injection two-stage cycles in the high and low stages of cascades to enhance the freezer s coefficient of performance. Therefore, twenty combinations have been explored, using R-290 in high temperature and R-170 in low temperature. The highest coefficient of performance, around 1.2, is
reached by the vapour injection in the low stage of the cascade.

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Pages: 10 p.

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Details

  • Original title: Liquid and vapour injection two-stage cycles in cascade configurations for ultra-low temperature refrigeration.
  • Record ID : 30029453
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 7th IIR International Conference on Sustainability and the Cold Chain Online. Proceedings: April 11-13 2022
  • Publication date: 2022/04/11
  • DOI: http://dx.doi.org/10.18462/iir.iccc2022.1104
  • Document available for consultation in the library of the IIR headquarters only.

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