Share

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

Number: 2412

Author(s) : HADDAD E., SAAB S., ZOUGHAIB A.

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. To replace these refrigerants, a new family of refrigerants was invented: hydro-fluoro-olefins (HFOs), also new systems were developed using CO2. In this paper, we present the outcome of a testing campaign aiming to compare the performance, operating range and cost of two condensing units of a rated capacity of 8kW cooling a secondary glycol loop. One of these machines, initially operated with R-404A, is operated with low GWP blends containing HFO while the other is using CO2. The comparison includes traditional HFC refrigerant (R-404A), 3 different commercial HFOs containing blends and transcritical CO2. The comparison is made using different ambient temperatures to have a fair comparison. A special focus is done analysing the glide impact on the condensing unit behaviour and performance. The glide matching blend (R-454C) shows an increased performance while the other refrigerants are penalized. Finally, HFOs containing blends were found more efficient and capable of operating at a wider temperature range compared to CO2.

Available documents

Format PDF

Pages: 9

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Test of condensing units’ performance and operating limits using different refrigerants.
  • Record ID : 30028477
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2021/05
  • Document available for consultation in the library of the IIR headquarters only.

Links


See other articles from the proceedings (184)
See the conference proceedings

Indexing