IIR document

Heat recovery solutions for R744 booster commercial refrigeration systems.

Number: pap. n. 176

Author(s) : DENECKE J., HAFNER A., EIKEVIK T., et al.


Supermarkets are major energy consumers, typically in the range of annually 500kWh/m2. Heat recovery from the refrigeration plant was early recognized as an efficiency strategy to diminish the energy bill. In the late years the use of carbon dioxide (CO2) as refrigerant (R744) for food retail application has experienced a large success especially in northern parts of Europe due to environmental considerations and its ability to deliver heat to the ventilation system. This paper presents a comparison between three heat recovery schemes for a supermarket located in Norway, equipped with a R744 booster system. Hot gas heat recovery, pressure control (transcritical), and hot gas plus condensation heat recovery with a R744 heat pump are investigated on a monthly basis using climate data for 2010. Hot gas recovery only has a lower heat reclaim, pressure control and heat pump schemes do have a similar performance.

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  • Original title: Heat recovery solutions for R744 booster commercial refrigeration systems.
  • Record ID : 30004318
  • Languages: English
  • Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
  • Publication date: 2012/06/25


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