Impact of the mixing theories on the performance of ejector expansion refrigeration cycles for environmentally-friendly refrigerants [Impact des théories de mélange sur les performances des cycles frigorifiques à détente par éjecteur pour des frigorigènes respectueux de l'environnement]

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dc.contributor.authorAtmaca A.U.
dc.contributor.authorErek A.
dc.contributor.authorEkren O.
dc.date.accessioned2021-05-03T20:51:56Z
dc.date.available2021-05-03T20:51:56Z
dc.date.issued2019
dc.description.abstractEjector expansion refrigeration cycle was investigated theoretically to compare the constant pressure mixing and constant area mixing ejector theories making use of thermodynamic models. Performance improvement was presented according to optimum and constant value pressure drop assumptions in order to simulate the design and off-design conditions, respectively. The agreement between the results with respect to both pressure drop assumptions is better at higher condenser and lower evaporator temperatures for each ejector mixing theory. Optimum area ratio (?opt) is less for constant area mixing approach since the ratio of the secondary flow velocity to the primary flow is higher for this ejector theory at each operation point. Although a group of low-global-warming-potential refrigerants were compared in terms of the performance and expansion losses, deep investigations were presented for R1234yf in main and sometimes R1234ze(E). Finally, when compared to other ejector sections, the mixing section efficiency has the most critical effect on the optimum performance improvement ratio of R1234yf with reference to constant pressure mixing assumption. © 2018 Elsevier Ltd and IIRen_US
dc.description.sponsorship116M367 Türkiye Bilimsel ve Teknolojik Araştirma Kurumu, TÜBITAKen_US
dc.description.sponsorshipThe authors would like to acknowledge the support of the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant No: 116M367.en_US
dc.identifier.doi10.1016/j.ijrefrig.2018.09.013
dc.identifier.endpage225en_US
dc.identifier.issn0140-7007
dc.identifier.issn0140-7007en_US
dc.identifier.scopus2-s2.0-85056601840en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage211en_US
dc.identifier.urihttps://doi.org/10.1016/j.ijrefrig.2018.09.013
dc.identifier.urihttps://hdl.handle.net/11454/70974
dc.identifier.volume97en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Ltden_US
dc.relation.ispartofInternational Journal of Refrigerationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectConstant area mixingen_US
dc.subjectConstant pressure mixingen_US
dc.subjectEjector expansion refrigeration cyclesen_US
dc.subjectEjector section efficiencyen_US
dc.subjectLow-GWP refrigerantsen_US
dc.subjectZero-dimensional (0D) modellingen_US
dc.titleImpact of the mixing theories on the performance of ejector expansion refrigeration cycles for environmentally-friendly refrigerants [Impact des théories de mélange sur les performances des cycles frigorifiques à détente par éjecteur pour des frigorigènes respectueux de l'environnement]en_US
dc.typeArticleen_US

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