Implementation of a two-phase ejector cycle for R744 glass door merchandisers

N. Lawrence, S. Elbel

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

Abstract

Glass door merchandisers are used to display chilled beverages or refrigerated foods in grocery and convenience stores. Carbon dioxide (R744, CO2) is seen as a promising low global warming potential refrigerant alternative for this application that is non-flammable and non-toxic. In this present study, the performance of the R744 glass door merchandiser refrigeration system has been further improved by implementing a two-phase ejector cycle. Previous ejector studies have mainly focused on larger residential or automotive air-conditioning, heat pumping, and supermarket refrigeration applications; the implementation of an ejector in smaller systems presents challenges in terms of low-cost ejector design and simplified cycle control. Different ejector cycles are discussed to compare the advantages of each cycle when used in a smallscale system. A low-cost design has been devised and implemented. Performance of the improved system is compared against the baseline without ejector.

Original languageEnglish (US)
Title of host publication12th IIR Gustav Lorentzen Natural Working Fluids Conference, GL 2016
PublisherInternational Institute of Refrigeration
Pages503-510
Number of pages8
ISBN (Electronic)9782362150180
DOIs
StatePublished - Jan 1 2016
Event12th IIR Gustav Lorentzen Natural Working Fluids Conference, GL 2016 - Edinburgh, United Kingdom
Duration: Aug 21 2016Aug 24 2016

Publication series

NameRefrigeration Science and Technology
ISSN (Print)0151-1637

Other

Other12th IIR Gustav Lorentzen Natural Working Fluids Conference, GL 2016
CountryUnited Kingdom
CityEdinburgh
Period8/21/168/24/16

Keywords

  • Glass door merchandiser
  • Light commercial refrigeration
  • Low-cost miniature ejector
  • Transcritical CO

ASJC Scopus subject areas

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

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  • Cite this

    Lawrence, N., & Elbel, S. (2016). Implementation of a two-phase ejector cycle for R744 glass door merchandisers. In 12th IIR Gustav Lorentzen Natural Working Fluids Conference, GL 2016 (pp. 503-510). (Refrigeration Science and Technology). International Institute of Refrigeration. https://doi.org/10.18462/iir.gl.2016.1082