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Experimental study of R450A drop-in performance in an R134a small capacity refrigeration unit
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. ISTENER Research Group, University Jaume I, Castellón de la Plana, 12071, Spain.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
2017 (English)In: International journal of refrigeration, ISSN 0140-7007, E-ISSN 1879-2081Article in journal (Refereed) In press
Abstract [en]

The Kigali's amendment to the Montreal Protocol has highlighted the hydrofluorocarbons (HFCs) phase out as a priority to reduce the future global Earth's mean temperature increase. R134a is the most abundant HFC in the atmosphere and therefore it must be substituted using environmentally benign alternatives. In the short term, blends of HFCs and hydrofluoroolefins can replace R134a. This paper experimentally evaluates R450A (GWP of 547), a non-flammable mixture of R1234ze(E) and R134a, in an R134a small capacity refrigeration system. The controlled experimental conditions cover evaporating temperatures from -15 to 12.5 °C and condensing temperature of 25, 30 and 35 °C (36 tests in total for each refrigerant). The experimental results showed that with only a thermostatic expansion valve adjustment the average R450A cooling capacity and COP are 9.9 and 2.9% lower than those measured using R134a. Besides, the observed compressor discharge temperature values of R450A are not greater than that of R134a.

Place, publisher, year, edition, pages
Elsevier, 2017.
Keywords [en]
vapor compression system, GWP, drop-in replacement, zeotropic refrigerant, HFC/HFO mixture, energy assessment
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-214839DOI: 10.1016/j.ijrefrig.2017.08.010ISI: 000414654000004Scopus ID: 2-s2.0-85030323293OAI: oai:DiVA.org:kth-214839DiVA, id: diva2:1143832
Projects
Effsys Expand 08
Funder
Swedish Energy Agency
Note

QC 20170925

Available from: 2017-09-22 Created: 2017-09-22 Last updated: 2017-11-24Bibliographically approved

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