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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGasche, Jose Luiz
dc.creatorAndreotti, Thiago
dc.creatorMacedo Maia, Cassio Roberto
dc.date2014-05-20T13:29:24Z
dc.date2016-10-25T16:48:45Z
dc.date2014-05-20T13:29:24Z
dc.date2016-10-25T16:48:45Z
dc.date2012-12-01
dc.date.accessioned2017-04-05T20:13:52Z
dc.date.available2017-04-05T20:13:52Z
dc.identifierInternational Journal of Refrigeration-revue Internationale Du Froid. Oxford: Elsevier B.V., v. 35, n. 8, p. 2223-2232, 2012.
dc.identifier0140-7007
dc.identifierhttp://hdl.handle.net/11449/9915
dc.identifierhttp://acervodigital.unesp.br/handle/11449/9915
dc.identifier10.1016/j.ijrefrig.2012.07.015
dc.identifierWOS:000313145600016
dc.identifierhttp://dx.doi.org/10.1016/j.ijrefrig.2012.07.015
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/857929
dc.descriptionIn 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.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationInternational Journal of Refrigeration-revue Internationale Du Froid
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCompressor
dc.subjectRolling piston
dc.subjectRadial clearance
dc.subjectOil-R134a mixture
dc.subjectRefrigerant leakage
dc.titleA model to predict R134a refrigerant leakage through the radial clearance of rolling piston compressors
dc.typeOtro


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