Successful conversion and validation of glass door merchandisers using transcritical R744

S. Elbel, Y. Padilla Fuentes, C. Bowers, P. Hrnjak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Glass door merchandisers are used in grocery and convenience stores to display chilled beverages or refrigerated foods. Among other possible choices for this application, carbon dioxide (R744, CO2) is seen as a promising low global warming potential (GWP) refrigerant alternative that is non-flammable and non-toxic. This study demonstrates that it is possible to design high-performance transcritical R744 glass door merchandiser systems that deliver cooling capacities and energy efficiencies that are comparable to results obtained with an R134a baseline system. In the present case, pull down time of the improved R744 system was slightly lower (97%), while energy efficiency was almost equal (103%) for tests conducted at an elevated ambient temperature of 32°C and 65% relative humidity. The most important observation is that these promising system results were obtained with low-cost technology, which was very comparable to what was used in the R134a system.

Original languageEnglish (US)
Title of host publication11th IIR Gustav Lorentzen Conference on Natural Refrigerants
Subtitle of host publicationNatural Refrigerants and Environmental Protection, GL 2014
EditorsWangyang Hu, Guojun Zhao
PublisherInternational Institute of Refrigeration
Pages421-429
Number of pages9
ISBN (Electronic)9782362150043
StatePublished - Jan 1 2014
Event11th IIR Gustav Lorentzen Conference on Natural Refrigerants, GL 2014 - Hangzhou, China
Duration: Aug 31 2014Sep 2 2014

Publication series

Name11th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerants and Environmental Protection, GL 2014

Other

Other11th IIR Gustav Lorentzen Conference on Natural Refrigerants, GL 2014
CountryChina
CityHangzhou
Period8/31/149/2/14

Keywords

  • COP
  • Efficiency
  • Glass door merchandiser
  • Light commercial refrigeration
  • Transcritical CO<inf>2</inf>

ASJC Scopus subject areas

  • Environmental Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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