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Advanced refrigerating plants based on transcritical cycles working with carbon dioxide for commercial refrigeration.

Author(s) : DISPENZA A., DISPENZA C., LA ROCCA V., et al.

Summary

This paper deals with a feasibility study on a refrigerating system for a big hypermarket in Sicily based on a three-stage transcritical cycle working with carbon dioxide which is compared with an alternative system composed of two cycles operating as a binary refrigerating plant: a top cycle working with propane and a bottom cycle working with carbon dioxide. The cold is produced at two temperatures: -15 and -35 °C. In both alternative systems, cold at -15 °C will be delivered to display cases, cold stores etc. by means of a secondary loop into which a refrigerant fluid circulates (e.g. an ethylene-glycol solution), while cold at -35 °C will be delivered by another loop into which liquid carbon dioxide circulates directly. Main results obtained demonstrate the effective feasibility of plants which seem suitable for commercial refrigeration; the best operating efficiency of the secondary loop system is crucial. This depends mainly on thorough design and building of the secondary loops, especially for those which operate at lower temperatures.

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Pages: 2005-3

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Details

  • Original title: Advanced refrigerating plants based on transcritical cycles working with carbon dioxide for commercial refrigeration.
  • Record ID : 2006-0620
  • Languages: English
  • Source: Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
  • Publication date: 2005/08/30

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