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Field measurements of AR404A low-temperature supermarket refrigeration system retrofitted with R449A
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2018 (English)In: Refrigeration Science and Technology, International Institute of Refrigeration, 2018, p. 468-474Conference paper, Published paper (Refereed)
Abstract [en]

Current international regulations set incentives to replace refrigerants with high global warming potential (GWP) values using environmentally friendly alternatives. This study presents the field measurements of an indirect commercial refrigeration system retrofitted with R449A, an alternative to R404A with a GWP value of 1282 (67% lower than that of R404A). The system has been operated at low evaporation temperature conditions(secondary refrigerant temperatures from -34 to -25°C). The results indicate that the cooling capacity of the retrofitted system was 1.3% lower than that of the reference R404A system on average, while the COP values are higher when using R449A (8.1% increase on average). The compressor discharge temperature increase is approximately 18.5 K. As a conclusion, R449A can be used as a replacement to R404A in indirect low-temperature supermarket refrigeration systems given that implications of its higher compressor discharge temperature, lower mass flow and difference in transport properties are taken into consideration.

Place, publisher, year, edition, pages
International Institute of Refrigeration, 2018. p. 468-474
Keywords [en]
Alternative refrigerant, Commercial refrigeration, Drop-in, GWP, R404A, R449A, Chains, Global warming, IIR filters, Refrigerants, Retail stores, Sustainable development, Temperature, Environmentally friendly alternatives, Evaporation temperature, Global warming potential, International regulations, Supermarket refrigeration
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-236410DOI: 10.18462/iir.iccc.2018.0061Scopus ID: 2-s2.0-85046284819ISBN: 9782362150241 (print)OAI: oai:DiVA.org:kth-236410DiVA, id: diva2:1259031
Conference
5th IIR Conference on Sustainability and the Cold Chain, ICCC 2018, 6 April 2018 through 8 April 2018
Funder
Swedish Energy Agency
Note

QC 20181026

Available from: 2018-10-26 Created: 2018-10-26 Last updated: 2018-10-26Bibliographically approved

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Makhnatch, PavelKhodabandeh, Rahmatollah

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