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Comparative analysis of secondary CO2 systems and water based brines in industrial and commercial refrigeration applications.

Author(s) : MIKHAILOV A., MATTHIESEN H. O.

Summary

In this paper a comparative study of CO2 and water based brine secondary cooling systems for refrigeration applications is presented. CO2 secondary systems are simple and could prove to be attractive for high temperature (HT) and medium temperature (MT) in industrial and commercial refrigeration applications regardless of climate. Calculations show that CO2 secondary systems give a possibility of energy savings in the range of 10-20% for HT systems and more than 20-30% for MT systems. The first cost of the NH3/CO2 brine systems proves to be in line with the first cost of NH3/glycol systems, while the life time cost is significantly lower. The design and particular challenges of CO2 systems are discussed. The analysis is illustrated by case studies. Further possibilities to optimized secondary CO2 systems by modulating pressure or applying frequency converters are discussed. The use of secondary CO2 systems in commercial refrigeration installations (supermarket systems) is briefly discussed.

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Pages: 2010-2

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Details

  • Original title: Comparative analysis of secondary CO2 systems and water based brines in industrial and commercial refrigeration applications.
  • Record ID : 2010-1891
  • Languages: English
  • Source: 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
  • Publication date: 2010/04/12

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