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Novel refrigerant R-474A for automotive heat pump applications.

Number: 0004

Author(s) : KARUBE D., NAKAUE T., TSUCHIYA T., GOBO K., AJIOKA S., YAMADA Y., NEGISHI Y., RYDKIN I., LEONALLUE A. de

Summary

In this paper we introduce novel refrigerant R-474A, a zeotropic blend of R-1234yf and R-1132(E) perfectly suited for A/C and heat pump applications in automotive across the whole temperature spectrum. R-1132(E) is a novel component with a vapor pressure of 1,666 kPa at 25degC and a GWP of 0.0056. R-474A presents a boiling point of -43 degC and a critical temperature of 87degC, with a Global Warming Potential (GWP) below 1. Real-life performance data demonstrate an increase of up to 40% in cooling capacity versus R-1234yf on existing MAC heat pump systems at drop-in. This additional capacity can be utilized to meet the increasing thermal management demands of BEVs (supercharging, cabin heating etc) and/or to downsize the compressor and reduce
compressor RPM. Furthermore, additional improvements can be achieved by adapting pressure settings of components.

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Pages: 8 p.

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Details

  • Original title: Novel refrigerant R-474A for automotive heat pump applications.
  • Record ID : 30031014
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 3rd IIR conference on HFO Refrigerants and low GWP Blends. Shanghai, China.
  • Publication date: 2023/04/05
  • DOI: http://dx.doi.org/10.18462/iir.HFO2023.0004

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