Share

IIR document

Experimental analysis of the performance of a semi-hermetic reciprocating compressor working with R744/R290 mixtures.

Author(s) : D'IGNAZI C., MOLINAROLI L.

Type of article: IJR article

Summary

In this study, a semi-hermetic compressor designed for R744 is tested using R744/R290 mixtures with mass composition of 100/0% (pure R744, baseline), 95/5%, 90/10%, 85/15%, and 80/20%. Tests are conducted under steady-state conditions for various operating points, including different saturation suction temperatures
and gas cooler pressures, with a fixed superheat of 10 K and constant compressor frequency. The results show that the refrigerant mass flow rate decreases with increasing propane content. Power consumption exhibits a complex and non-linear behavior: at low propane concentrations no clear trend is observed, whereas at higher propane contents a reduction in power consumption is measured. The discharge temperature is higher for the R744/R290 mixtures compared to pure R744. Regarding performance, volumetric and global efficiencies show no significant differences up to 15% propane, while a noticeable increase is observed at 20% propane, indicating an overall improvement in compressor performance at higher propane concentrations.

Available documents

Format PDF

Pages: 8 p.

Available

  • Public price

    20 €

  • Member price*

    Free

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

Details

  • Original title: Experimental analysis of the performance of a semi-hermetic reciprocating compressor working with R744/R290 mixtures.
  • Record ID : 30034898
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 186
  • Publication date: 2026/06
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2026.106890

Links


See other articles in this issue (27)
See the source

Indexing