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Thermodynamics analysis of CO2 refrigeration cycles working with mechanical subcooling systems.

Number: pap. n. 405

Author(s) : NEBOT-ANDRÉS L., LLOPIS R., CATALÁN-GIL J., et al.

Summary

In the last years, CO2 is acquiring a lot of weight in refrigeration due to the reduction of the use of HFCs, but its energy performance in some working conditions decreases significantly. The energetic parameters of the cycle can be improved by subcooling the gas at the exit of the gas-cooler, especially at high hot sink temperatures, as presented in recent studies. The purpose of this work is to do a thermodynamic study of subcooling systems in order to quantify these improvements. The analyzed subcooling systems are the dedicated mechanical subcooling and the integrated mechanical subcooling. Using simplified models of the systems, the optimum working conditions are evaluated and discussed, obtaining the increments in COP and cooling capacity compared to the base cycle. The systems are evaluated in a theoretical way for different environmental and evaporating conditions, in order to determine the overall energy performance improvement obtained thanks to the subcooling systems.

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Pages: 8

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Details

  • Original title: Thermodynamics analysis of CO2 refrigeration cycles working with mechanical subcooling systems.
  • Record ID : 30026414
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0405

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