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Experimental analysis of a R-744 refrigeration unit for light commercial vehicles.

Author(s) : SHAH W., FABRIS F., MINETTO S., MARINETTI S., ROSSETTI A.

Type of article: IJR article

Summary

This manuscript presents the design and development of a transcritical R-744 refrigeration unit for light and medium-sized refrigerated transport applications, along with an experimental campaign carried out on a labo ratory prototype. The steady-state performance of the system is evaluated for both a conventional baseline back- pressure cycle and an ejector-enhanced configuration, under different refrigerated space temperatures ( 5 0 ◦ C, and 5 ◦ C) and ambient conditions ranging from 20 ◦ C to 40 ◦ ◦ C, C. The results show that the ejector configuration leads to significant performance improvement compared to the baseline back-pressure operation, particularly at higher ambient temperatures, where the coefficient of perfor mance (COP) increases up to approximately 25 %. At lower ambient temperatures however, back-pressure cycle provide a higher COP. In addition, when compared to systems based on synthetic refrigerant reported in the literature, the proposed R-744 unit demonstrates competitive energy performance. Specifically, a COP improvement of about 15 % is observed at an ambient temperature of 20 ◦ mately 17 % are achieved at 30 ◦ C and 40 ◦ C in back-pressure configuration, while improvements of approxi C in ejector configuration.

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  • Original title: Experimental analysis of a R-744 refrigeration unit for light commercial vehicles.
  • Record ID : 30034982
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 188
  • Publication date: 2026/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2026.106985

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