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Experimental study on the operating characteristics of a display refrigerator phasing out R134a to R1234yf.

Author(s) : MORALES-FUENTES A., RAMIREZ-HERNANDEZ H. G., MENDEZ-DIAZ S., MARTINEZ-MARTINEZ E., SANCHEZ-CRUZ F. A., SILVA-ROMERO J. C., GARCIA-LARA H. D.

Type of article: IJR article

Summary

In this study, an experimental determination of the refrigerant charge and the operating conditions in a vertical display refrigerator using R134a, R513A, and R1234yf is presented. The three refrigerants' energy inputs under ambient temperatures of 24, 32, and 40°C are compared. The refrigerator is instrumented with a mass flow meter, thermocouples, and pressure transducers. The evaluations are carried out inside a room with controlled temperature and air recirculation. For each analysis, the refrigerator is operated for a period long enough until differences among operation on/off cycles are negligible. Batch loads of 15 g are used for determining an adequate refrigerant charge. The results show a recommended charge of 175g for the three refrigerants and the range of temperatures. The electric energy consumption increase on average 20 kJ per hour of operation for every degree the ambient temperature increases. Compared with R134a, the R513A results in lower energy input in 3.8, 3.9, and 0.3% for 24 and 32 and 40°C, respectively. The experimental determination of EER values does not give accurate guidance for the adequate refrigerant charge. The assumption of isobaric heat exchange results in a maximum deviation of the actual cooling duty of 13, 18.7, and 16.6% for R134a, R1234yf, and R513A, respectively.

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Pages: 317-329

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Details

  • Original title: Experimental study on the operating characteristics of a display refrigerator phasing out R134a to R1234yf.
  • Record ID : 30029091
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 130
  • Publication date: 2021/10
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.05.032
  • Document available for consultation in the library of the IIR headquarters only.

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