Exergy analyses of two and three stage cryogenic cycles

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dc.contributor.authorAtasbak, Musa
dc.contributor.authorKeven, Arzu
dc.contributor.authorKaraali, Rabi
dc.date.accessioned2024-10-04T18:50:59Z
dc.date.available2024-10-04T18:50:59Z
dc.date.issued2022
dc.departmentBayburt Üniversitesien_US
dc.description.abstractCryogenics has an important influence on industry and science. In this study, optimum working conditions are obtained by applying exergy analysis and local optimization methods to two- and three-stage vapor compression cascade cryogenic cycle. The first and second laws of thermodynamics, exergy analysis, and local optimization methods are applied to the two- and three-stage cascade cryogenic cycle. By considering the needs and demands, it is possible to create new cycles by adding new devices and/or new stages to these cycles. The results of the optimum operating conditions are obtained for the two- and three-stage vapor compression cascade cryogenic cycle. It is seen that to achieve high COP values and high efficiency; it is necessary to reduce the compression ratio of the compressor as much as the fluid allows. For the two-stage cycle, the minimum total work required for cryogenic cooling is around P (7) = 2,400 kPa. The COP value is 0.30 between P (7) = 2,400 and 2,800 kPa, and the maximum exergy efficiency is obtained around 0.235. It is seen operating the first-stage compressor at high pressures increases the total losses of the entire cycle from 7,500 to 18,550 kW. The increase in total exergy losses is around 247%, and operating the first-stage compressor at high pressures increases the exergy efficiency of the entire cycle. The increase in total exergy efficiency is around 160%. When the second-stage compressor is operated at low pressure, the COP value increases by 2%, the exergy efficiency increases by 20%, and the exergy losses decrease by around 40%.en_US
dc.identifier.doi10.1515/arh-2022-0134
dc.identifier.endpage204en_US
dc.identifier.issn1430-6395
dc.identifier.issn1617-8106
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85148221475en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage190en_US
dc.identifier.urihttps://doi.org/10.1515/arh-2022-0134
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3294
dc.identifier.volume32en_US
dc.identifier.wosWOS:000935138600001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherDe Gruyter Poland Sp Z O Oen_US
dc.relation.ispartofApplied Rheologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectcryogenicen_US
dc.subjectexergyen_US
dc.subjectlocal optimizationen_US
dc.titleExergy analyses of two and three stage cryogenic cyclesen_US
dc.typeArticleen_US

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