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Comparison of CO2-glycol-ammonia cascade to trans-critical CO2 and ammonia-CO2 cascade systems.

Number: 1140

Author(s) : OLIVER G.

Summary

With the need to use low GWP / ODP refrigerants as a result of environmental factors, including new legislation, carbon dioxide has returned to the fore as an industrial refrigerant – particularly for freezer and cold storage applications. Typical system types include trans-critical CO2 and ammonia cascade systems. A variation that uses cooled glycol from ammonia package chillers to condense the carbon dioxide within a subcritical system has been developed and installed in industrial cold storage applications. The system takes advantage of equipment already being installed for chilled storage on site in order to avoid trans-critical operation of the CO2 system.
This paper describes the CO2-glycol-ammonia cascade system and presents examples of installed systems. The paper then compares trans-critical CO2, ammonia-CO2 cascade and CO2-glycol-ammonia cascade systems, and concludes with recommendations in terms of efficiency and capital cost.

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Pages: 8

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Details

  • Original title: Comparison of CO2-glycol-ammonia cascade to trans-critical CO2 and ammonia-CO2 cascade systems.
  • Record ID : 30027663
  • Languages: English
  • Subject: HFCs alternatives
  • Source: IIR Rankine Conference 2020.
  • Publication date: 2020/07/31
  • DOI: http://dx.doi.org/10.18462/iir.rankine.2020.1140

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