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Experimental evaluation of a CO2 transcritical refrigeration plant with dedicated mechanical subcooling.

Author(s) : LLOPIS R., NEBOT-ANDRÉS L., CABELLO R., et al.

Type of article: Article, IJR article

Summary

CO2 transcritical refrigeration cycles require optimization to reach the performance of conventional solutions at high ambient temperatures. Theoretical studies demonstrated that the combination of a transcritical cycle with a mechanical subcooling cycle improves its performance; however, any experimentation with CO2 has been found. This work presents the energy improvements of the use of a mechanical subcooling cycle in combination with a CO2 transcritical refrigeration plant, experimentally. It tested the combination of a R1234yf single-stage refrigeration cycle with a semihermetic compressor for the mechanical subcooling cycle, with a single-stage CO2 transcritical refrigeration plant with a semihermetic compressor. The combination is evaluated at two evaporating levels of the CO2 cycle (0 and -10 °C) and three heat rejection temperatures (24, 30 and 40 °C). The optimum operating conditions and capacity and COP improvements are analysed with maximum increments on capacity of 55.7% and 30.3% on COP.

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Pages: 361-368

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Details

  • Original title: Experimental evaluation of a CO2 transcritical refrigeration plant with dedicated mechanical subcooling.
  • Record ID : 30018602
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 69
  • Publication date: 2016/09

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