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IIR document

CO2 refrigeration system with integrated propan subcooler for supermarkets in warm climate.

Number: pap. 1031

Author(s) : EIKEVIK T. M., BERTELSEN S., HAUGSDAL S., et al.

Summary

A CO2 refrigeration system with a secondary propane cycle was developed for operation at a higher ambient air temperature. The system has a CO2 gas cooler with integrated propane condenser and a propane sub-cooler. This allows sub-critical operation of CO2 at all ambient temperatures. A prototype unit was instrumented and tested. The optimal points for start of propane cycle was found at the ambient temperature of 23.5°C (field tests) and 19.4 °C (simulation). COP of the system was calculated for different European capitals. COP can be increased (up to 15.0 %) by increasing of air-velocity through the heat exchanger. An effective design of CO2-propane condenser was suggested. New design increases COP from 8.84 % to 6.91 % at 18.7 °C and 40.0 °C ambient temperature respectively.

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Pages: 8 p.

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Details

  • Original title: CO2 refrigeration system with integrated propan subcooler for supermarkets in warm climate.
  • Record ID : 30019088
  • Languages: English
  • Source: 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
  • Publication date: 2016/08/21
  • DOI: http://dx.doi.org/10.18462/iir.gl.2016.1031

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