The thermodynamic and environmental analysis of a variable speed R404A refrigeration system using R455A

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dc.authoridOruc, Vedat/0000-0001-9055-1508
dc.contributor.authorDevecioglu, Atilla G.
dc.contributor.authorOruc, Vedat
dc.date.accessioned2025-02-22T14:08:59Z
dc.date.available2025-02-22T14:08:59Z
dc.date.issued2024
dc.departmentDicle Üniversitesien_US
dc.description.abstractThe suitability of drop-in application of low-GWP refrigerant R455A in a R404A refrigeration system is experimentally investigated in this paper comparing energy performance and environmental impacts (i.e., CO2 emissions) of the system. The evaporation temperatures are -5, 0 and + 5 degrees C while condensation temperatures are 30, 40 and 50 degrees C in the test conditions. Besides, the compressor speed is adjusted for three cases as 40, 45 and 50 Hz. The behaviours of COP, exergy efficiency and total equivalent warming impact (TEWI) are determined depending on evaporation and condensation temperatures as well as compressor speed. The results demonstrate that although cooling capacity of R404A is higher, COP of R455A is computed to be better than R404A about by 4.3 % (on average) for all covered cases. The exergy efficiency of R455A is also found to be higher compared to R404A. The COP and exergy efficiency values are reduced, TEWI enhances as compressor speed increases for both R404A and R455A. Additionally, an empirical expression (valid within about +/- 5 % and independent of variable parameters such as refrigerant type, compressor speed as well as evaporation and condensation temperatures) is proposed for the relationship between nondimensional parameters COP and compression ratio. Furthermore, the amount of TEWI is verified to be lower for R455A than R404A, hence the studied alternative blend can be preferred due to the environmentally friendly characteristic. It can be suggested referring to the obtained results that R455A can be directly used in a R404A refrigeration system due to improved thermodynamic performance and diminished CO2 emissions.en_US
dc.identifier.doi10.1016/j.tsep.2024.103083
dc.identifier.issn2451-9049
dc.identifier.scopus2-s2.0-85211067597en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.tsep.2024.103083
dc.identifier.urihttps://hdl.handle.net/11468/29744
dc.identifier.volume56en_US
dc.identifier.wosWOS:001375088000001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofThermal Science and Engineering Progressen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzKA_WOS_20250222
dc.subjectR455Aen_US
dc.subjectR404Aen_US
dc.subjectExergy efficiencyen_US
dc.subjectTEWIen_US
dc.subjectVariable speed compressoren_US
dc.titleThe thermodynamic and environmental analysis of a variable speed R404A refrigeration system using R455Aen_US
dc.typeArticleen_US

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