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Test of condensing units performance and operating limits using different refrigerants.

Number: 1061

Author(s) : HADDAD E., MONTEL V., ROBERTS N., ZOUGHAIB A., SAAB S.

Summary

The European regulation has set a series of limitation to reach the objective of reducing the Global Warming Potential (GWP) emissions. Among these limits, the ban of Hydrofluorocarbons (HFC) refrigerants having a GWP higher than 2500 starting 2020. Replacement refrigerants, are, among others, the HFO blends and the transcritical refrigeration system using CO2. In this paper, we present the outcome of a testing campaign aiming to compare the performance, operating range of a condensing unit of a rated capacity of 8kW operated with HFC 404A and three drop-in low GWP HFO/HFC blends, and a second condensing unit of equivalent capacity using transcritical CO2. The comparison is made using different ambient temperatures while operating at the average evaporating temperature. In addition, a numerical model simulated the efficiency increase of adding various elements to the transcritical refrigeration system. HFO/HFC blends were found more efficient and capable of operating at a wide temperature range.

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Pages: 7

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Details

  • Original title: Test of condensing units performance and operating limits using different refrigerants.
  • Record ID : 30028823
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: 2nd IIR Conference on HFO Refrigerants and Low GWP Blends
  • Publication date: 2021/06
  • DOI: http://dx.doi.org/10.18462/iir.HFO.2021.1061
  • Document available for consultation in the library of the IIR headquarters only.

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