Experimental Investigation of Surface Roughness Effects on the Flow Boiling of R134a in Microchannels

dc.authorid BAYER, Ozgur/0000-0003-0508-2263
dc.authorid Özyurt, Tuba Okutucu/0000-0003-4248-8043
dc.authorid Jafari, Rahim/0000-0003-1155-3711
dc.authorid UNVER, HAKKI OZGUR/0000-0002-4632-3505
dc.authorscopusid 54989651300
dc.authorscopusid 54896376600
dc.authorscopusid 6603873269
dc.authorscopusid 37017931600
dc.authorwosid BAYER, Ozgur/CAF-6447-2022
dc.authorwosid JAFARI, RAHIM/KGM-2438-2024
dc.authorwosid Özyurt, Tuba Okutucu/ABB-5217-2020
dc.contributor.author Jafari, Rahim
dc.contributor.author Okutucu-Ozyurt, Tuba
dc.contributor.author Unver, Hakki Ozgur
dc.contributor.author Bayer, Ozgur
dc.contributor.other Automotive Engineering
dc.date.accessioned 2024-07-05T14:31:22Z
dc.date.available 2024-07-05T14:31:22Z
dc.date.issued 2016
dc.department Atılım University en_US
dc.department-temp [Jafari, Rahim; Okutucu-Ozyurt, Tuba; Bayer, Ozgur] Middle East Tech Univ, Dept Mech Engn, Dumlupinar Bulvari 1, TR-06800 Ankara, Turkey; [Jafari, Rahim] ATILIM Univ, Dept Automot Engn, Kizilcasar Mahallesi, Ankara, Turkey; [Unver, Hakki Ozgur] TOBB Univ Econ & Technol, Dept Mech Engn, TR-06520 Ankara, Turkey en_US
dc.description BAYER, Ozgur/0000-0003-0508-2263; Özyurt, Tuba Okutucu/0000-0003-4248-8043; Jafari, Rahim/0000-0003-1155-3711; UNVER, HAKKI OZGUR/0000-0002-4632-3505 en_US
dc.description.abstract This study experimentally investigates the effect of surface roughness on the hydrodynamic and thermal performance of microchannel evaporators. Three micro-evaporators of the same dimensions and different surface roughness have been fabricated by micro-WEDM. Each micro-evaporator consists of forty rectangular microchannels of 700 mu m height, 250 mu m width, and 19 mm length. A microscale vapor compression refrigeration cycle has been constructed to carry out the experiments. R134a is used as the refrigerant. Heat transfer coefficient, pressure drop and COP results are presented at variously imposed heat fluxes, and at mass fluxes of 85 and 200 kg/(m(2)s). The results demonstrate up to 45% enhancement in the two-phase heat transfer coefficient at low to moderate heat flux values as the surface roughness increases. Considering the surface roughness effect of the microchannel walls, a new correlation is developed to predict the heat transfer coefficient of R134a boiling in microchannels. (C) 2016 Elsevier Inc. All rights reserved. en_US
dc.description.sponsorship Scientific and Technological Research Council of Turkey (TUBITAK) [112M168] en_US
dc.description.sponsorship This study has been financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under grant number 112M168. The micro-evaporators of different roughness have been fabricated at the Micro System Design and Manufacturing Center of Bilkent University, Ankara, Turkey. The authors would like to thank Mr. Mustafa Yalcin for his contribution to construct the test setup. en_US
dc.identifier.citationcount 20
dc.identifier.doi 10.1016/j.expthermflusci.2016.07.016
dc.identifier.endpage 230 en_US
dc.identifier.issn 0894-1777
dc.identifier.issn 1879-2286
dc.identifier.scopus 2-s2.0-84990225990
dc.identifier.startpage 222 en_US
dc.identifier.uri https://doi.org/10.1016/j.expthermflusci.2016.07.016
dc.identifier.uri https://hdl.handle.net/20.500.14411/665
dc.identifier.volume 79 en_US
dc.identifier.wos WOS:000383293200025
dc.identifier.wosquality Q2
dc.institutionauthor Jafari, Rahim
dc.language.iso en en_US
dc.publisher Elsevier Science inc en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.scopus.citedbyCount 28
dc.subject Micro-evaporator en_US
dc.subject Surface roughness en_US
dc.subject Vapor compression refrigeration cycle en_US
dc.subject Microscale two-phase flow en_US
dc.subject Boiling en_US
dc.title Experimental Investigation of Surface Roughness Effects on the Flow Boiling of R134a in Microchannels en_US
dc.type Article en_US
dc.wos.citedbyCount 25
dspace.entity.type Publication
relation.isAuthorOfPublication 5bcaecde-f33a-497d-ac10-660e2fed2f16
relation.isAuthorOfPublication.latestForDiscovery 5bcaecde-f33a-497d-ac10-660e2fed2f16
relation.isOrgUnitOfPublication 7d024e9b-1f00-4f1d-a95a-f448a474eea9
relation.isOrgUnitOfPublication.latestForDiscovery 7d024e9b-1f00-4f1d-a95a-f448a474eea9

Files

Collections