High-efficiency, low-cost glass door merchandisers using transcritical carbon dioxide

Yadira Padilla Fuentes, Predrag Stojan Hrnjak, Stefan Elbel

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 nontoxic. 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 publication24th IIR International Congress of Refrigeration, ICR 2015
PublisherInternational Institute of Refrigeration
Pages2757-2764
Number of pages8
ISBN (Electronic)9782362150128
DOIs
StatePublished - 2015
Event24th IIR International Congress of Refrigeration, ICR 2015 - Yokohama, Japan
Duration: Aug 16 2015Aug 22 2015

Other

Other24th IIR International Congress of Refrigeration, ICR 2015
Country/TerritoryJapan
CityYokohama
Period8/16/158/22/15

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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