A model to predict R134a refrigerant leakage through the radial clearance of rolling piston compressors

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dc.contributor.authorGasche, Jose Luiz [UNESP]
dc.contributor.authorAndreotti, Thiago [UNESP]
dc.contributor.authorMacedo Maia, Cassio Roberto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:24Z
dc.date.available2014-05-20T13:29:24Z
dc.date.issued2012-12-01
dc.description.abstractIn this paper a non-isothermal two-phase model for oil-R134a refrigerant mixture flow is presented to predict the R134a leakage through the radial clearance of rolling piston compressors. The flow is divided in a liquid single-phase region and in a two-phase region, in which the homogeneous model is used to simulate the flow. The refrigerant leakage is determined using the mixture mass flow rate and the refrigerant mass fraction variation along the flow. The results are obtained for inlet pressures varying from 200 to 700 kPa, inlet temperatures ranging from 40 to 60 degrees C, and minimal clearances between 10 and 60 mu m. The results are firstly compared to existing isothermal model data, showing that there is a significant difference between the leakage flow rates predicted by isothermal and non-isothermal models. Finally, a useful general equation for compressor designers is proposed to calculate the refrigerant leakage for a large range of operation conditions. (C) 2012 Elsevier Ltd and IIR. All rights reserved.en
dc.description.affiliationState Univ São Paulo, Dept Mech Engn, Coll Ilha Solteira, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespState Univ São Paulo, Dept Mech Engn, Coll Ilha Solteira, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipDepartment of Mechanical Engineering at Unesp-Ilha Solteira
dc.format.extent2223-2232
dc.identifierhttp://dx.doi.org/10.1016/j.ijrefrig.2012.07.015
dc.identifier.citationInternational Journal of Refrigeration-revue Internationale Du Froid. Oxford: Elsevier B.V., v. 35, n. 8, p. 2223-2232, 2012.
dc.identifier.doi10.1016/j.ijrefrig.2012.07.015
dc.identifier.issn0140-7007
dc.identifier.lattes5734872576111597
dc.identifier.lattes3462476373574122
dc.identifier.urihttp://hdl.handle.net/11449/9915
dc.identifier.wosWOS:000313145600016
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofInternational Journal of Refrigeration-revue Internationale Du Froid
dc.relation.ispartofjcr3.233
dc.relation.ispartofsjr1,471
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCompressoren
dc.subjectRolling pistonen
dc.subjectRadial clearanceen
dc.subjectOil-R134a mixtureen
dc.subjectRefrigerant leakageen
dc.titleA model to predict R134a refrigerant leakage through the radial clearance of rolling piston compressorsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes5734872576111597
unesp.author.lattes3462476373574122[3]
unesp.author.orcid0000-0001-6353-8199[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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