A regressive model for dynamic instabilities during the condensation of R404A and R507 refrigerants

dc.contributor.authorKuczynski, Waldemar
dc.contributor.authorBohdal, Tadeusz
dc.contributor.authorMeyer, Josua P.
dc.contributor.authorDenis, Aleksander
dc.contributor.emailjosua.meyer@up.ac.zaen_ZA
dc.date.accessioned2019-08-30T13:18:42Z
dc.date.issued2019-10
dc.description.abstractThis paper presents the results of experimental research and mathematical modelling on the influence of dynamic instabilities on the condensation phase change of R507 refrigerant in tubular mini-channels. This agent is currently being utilised as a temporary substitute for R404A, with R448A intended as the target substitute. In addition to the results, this paper contains a dimensional analysis procedure based on the Π-Buckingham theorem that has allowed for the development of a regressive model for the velocities of the dynamic instabilities. The experimental part of this paper was conducted using tubular mini-channels with internal diameters of 1.44, 2.3, and 3.3 mm.en_ZA
dc.description.departmentMechanical and Aeronautical Engineeringen_ZA
dc.description.embargo2020-10-01
dc.description.librarianhj2019en_ZA
dc.description.librarianmi2025en
dc.description.sdgSDG-04: Quality educationen
dc.description.sdgSDG-07: Affordable and clean energyen
dc.description.sdgSDG-09: Industry, innovation and infrastructureen
dc.description.urihttp://www.elsevier.com/locate/ijhmten_ZA
dc.identifier.citationKuczynski, W., Bohdal, T., Meyer, J.P. et al. 2019, 'A regressive model for dynamic instabilities during the condensation of R404A and R507 refrigerants', International Journal of Heat and Mass Transfer, vol. 141, pp. 1025-1035.en_ZA
dc.identifier.issn0017-9310 (print)
dc.identifier.issn1879-2189 (online)
dc.identifier.other10.1016/j.ijheatmasstransfer.2019.06.095
dc.identifier.urihttp://hdl.handle.net/2263/71246
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2019 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in International Journal of Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in International Journal of Heat and Mass Transfer, vol. 141, pp. 1025-1035, 2019. doi : 10.1016/j.ijheatmasstransfer.2019.06.095.en_ZA
dc.subjectCondensation refrigerantsen_ZA
dc.subjectMini-channelsen_ZA
dc.subjectInstabilityen_ZA
dc.subjectRegression functionen_ZA
dc.subject.otherEngineering, built environment and information technology articles SDG-04
dc.subject.otherSDG-04: Quality education
dc.subject.otherEngineering, built environment and information technology articles SDG-07
dc.subject.otherSDG-07: Affordable and clean energy
dc.subject.otherEngineering, built environment and information technology articles SDG-09
dc.subject.otherSDG-09: Industry, innovation and infrastructure
dc.titleA regressive model for dynamic instabilities during the condensation of R404A and R507 refrigerantsen_ZA
dc.typePostprint Articleen_ZA

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