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Conversion of a direct to an indirect commercial (HFC134a/CO2) cascade refrigeration system: energy impact analysis.

Author(s) : SÁNCHEZ D., LLOPIS R., CABELLO R., et al.

Type of article: Article, IJR article

Summary

Energy impact of conversion of a direct HFC134a/CO2 cascade refrigeration system to an indirect HFC134a-secondary fluid / CO2 cascade for commercial applications is experimentally analysed. Refrigeration systems, fully described, have been tested in laboratory conditions, at three condensing temperatures (25, 35 and 45?°C), providing the cooling needs to a cabinet for fresh product (2?°C) and to another for frozen product (-20?°C), both placed inside a climatic chamber simulating the indoor conditions of a supermarket. Energy evaluation considered 24 hour tests of stable operation in each test condition. A decrease from 1.9 to 3.5?K of the evaporation temperature of the high temperature cycle has been measured when using an indirect system. It resulted in a variation of the energy consumption of the whole system between 7.6 to 14.0% when using propylene-glycol/water and between -0.3 to 11.1% when using Temper -20® as secondary fluid.

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Pages: 183-199

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Details

  • Original title: Conversion of a direct to an indirect commercial (HFC134a/CO2) cascade refrigeration system: energy impact analysis.
  • Record ID : 30019844
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 73
  • Publication date: 2017/01

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