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Scanning Ternary Mixtures for the Low Stage of Cascades in Ultra-Low Temperature Refrigeration.

Number: 1105

Author(s) : MOTA BABILONI A., FERNANDEZ MORENO A., GIMÉNEZ-PRADES P., NAVARRO-ESBRÍ J.

Summary

The absence of GWP limitation for refrigerants operating in vapour compression systems with a target temperature below –50 °C has caused slower market development. Therefore, while typical refrigeration applications count with several mixtures offering different characteristics, a few mixtures already exist for –80 °C refrigeration (R-469A, R-472A, and R-473A). This paper explores the combination of pure fluids with varied characteristics as mixtures for ultra-low temperature refrigeration. Different parameters have been considered in the theoretical screening, such as volumetric cooling capacity, coefficient of performance, global warming potential, and flammability while keeping operating conditions constant. The refrigerants R-744, R-32, R-125, R-744, R-134a, R-1132a, R-41, and R-23, and R-1150, have been combined at steps of 5%. Mixtures with the lowest global warming potential and highest coefficient of performance result in high flammability. Environmental and energetic aspects should have a lower priority to reduce the flammability classification.

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Pages: 16 p.

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Details

  • Original title: Scanning Ternary Mixtures for the Low Stage of Cascades in Ultra-Low Temperature Refrigeration.
  • Record ID : 30029455
  • Languages: English
  • Subject: Technology
  • 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.iccc2022.1105
  • Document available for consultation in the library of the IIR headquarters only.

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