Computational thermal analysis of cylindrical fin design parameters and a new methodology for defining fin structure in LED automobile headlamp cooling applications

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dc.authorid0000-0001-8647-4861en_US
dc.contributor.authorSökmen, Kemal Fürkan
dc.contributor.authorYuruklu, Emrah
dc.contributor.authorYamankaradeniz, Nurettin
dc.date.accessioned2021-03-20T20:14:41Z
dc.date.available2021-03-20T20:14:41Z
dc.date.issued2016
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description.abstractIn this study, the effects of fin design, fin material, and free and forced convection on junction temperature in automotive headlamp cooling applications of LED lights are researched by using ANSYS CFX 14 software. Furthermore a new methodology is presented for defining the optimum cylindrical fin structure within the given limits. For measuring the performance of methodology, analyses are carried out for various ambient temperatures (25 degrees C, 50 degrees C and 80 degrees C) and different LED power dissipations (0.5 W, 0.75 W, 1 W and 1.25 W). Then, analyses are repeated at different heat transfer coefficients and different fin materials in order to calculate LED junction temperature in order to see if the fin structure proposed by the methodology is appropriate for staying below the given safety temperature limit. As a result, the suggested method has always proposed proper fin structures with optimum characteristics for given LED designs. As another result, for safe junction temperature ranges, it is seen that for all LED power dissipations, adding aluminum or copper plate behind the printed circuit board at low ambient temperatures is sufficient. Also, as the ambient temperature increases, especially in high powered LED lights, addition of aluminum is not sufficient and fin usage becomes essential. High heat transfer coefficient and using copper fin affect the junction temperature positively. (C) 2015 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipMagneti Marelli SpAen_US
dc.description.sponsorshipThe authors would like to gratefully thank Magneti Marelli SpA for their support to this study. The algorithm for defining fin structure described in this study (Fig. 7) is used for designing LED cooling system of a worldwide vehicle's headlamp that is being produced by a top-5 OEM brand since 2014.en_US
dc.identifier.doi10.1016/j.applthermaleng.2015.10.069en_US
dc.identifier.endpage542en_US
dc.identifier.issn1359-4311
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage534en_US
dc.identifier.urihttp://doi.org/10.1016/j.applthermaleng.2015.10.069
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1091
dc.identifier.volume94en_US
dc.identifier.wosWOS:000370770300055en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorSökmen, Kemal Fürkan
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofApplied Thermal Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAutomotive LED lighting systemsen_US
dc.subjectLaminar natural convectionen_US
dc.subjectHeat sinksen_US
dc.subjectComputational fluid dynamics (CFD)en_US
dc.titleComputational thermal analysis of cylindrical fin design parameters and a new methodology for defining fin structure in LED automobile headlamp cooling applicationsen_US
dc.typeArticleen_US

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