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Waste heat dehumidification in CO2 booster supermarket.

Number: pap. 2441

Author(s) : SHARMA V., FRICKE B., BANSAL P.

Summary

Carbon dioxide (CO2) being a low Global Warming Potential (GWP) refrigerant is becoming a popular choice as an efficient refrigerant in supermarket refrigeration systems, not only in moderate climates such as Northern Europe but also in the United States. Due to its low critical temperature (31.06°C), CO2 systems also offer potential for waste heat utilization. This paper, therefore, aims to uncover this potential for the US supermarket refrigeration industry through simulation. In this process, the whole building energy modeling tool, EnergyPlus, has been used to investigate the energy consumption of a supermarket utilizing packaged rooftop air conditioning units and a transcritical CO2 booster refrigeration system. The potential for waste heat utilization for application in desiccant regeneration, water heating and space heating has been analyzed. In addition, the energy impact of humidity control within the supermarket on the HVAC system is investigated. Finally, the waste heat utilization potential of the transcritical CO2 booster refrigeration system is compared with the baseline R404A multiplex direct expansion system in sixteen cities from eight climate zones of the United States.

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Pages: 8 p.

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Details

  • Original title: Waste heat dehumidification in CO2 booster supermarket.
  • Record ID : 30013411
  • Languages: English
  • Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2014/07/14

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