Effect of design and operating parameters on the thermal performance of aluminum flat grooved heat pipes

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buir.contributor.authorAlijani, Hossein
buir.contributor.authorÇetin, Barbaros
dc.citation.epage187en_US
dc.citation.spage174en_US
dc.citation.volumeNumber132en_US
dc.contributor.authorAlijani, Hosseinen_US
dc.contributor.authorÇetin, Barbarosen_US
dc.contributor.authorAkkuş, Y.en_US
dc.contributor.authorDursunkaya, Z.en_US
dc.date.accessioned2019-02-11T12:30:16Z
dc.date.available2019-02-11T12:30:16Z
dc.date.issued2018-03-05en_US
dc.departmentDepartment of Mechanical Engineeringen_US
dc.description.abstractFour aluminum flat grooved heat pipes with groove widths of 0.2, 0.4, 0.8 and 1:6 mm are fabricated and the effect of filling ratio on the thermal performance is experimentally studied for four different heat flux values of 2.1, 3.2, 4.2 and 5:3W=cm2. An optimum filling ratio corresponding to each heat flux is determined where the heat pipe has the best thermal performance. Thermal performance of the heat pipes are evaluated using three indicators; (i) the temperature difference between the heat source and heat sink surfaces, (ii) the temperature difference between the peak system temperature and the temperature of the cooling ambient and (iii) heat pipe effectiveness defined as a temperature difference ratio under dry and operating conditions. A flow and evaporative mass scaling model is developed to interpret the experimental findings. Experimental results reveal that at the optimum point the heat pipe with the 0:4 mm groove width has the best thermal performance, and the heat pipe with the smallest 0:2 mm groove operates under dryout conditions even for the lowest heat flux, the reason of which is discussed based on interpretation of underlying phase change physics. Experiments reveal the existence of two operating regimes; with and without dryout in the grooves. Although higher heat loads can be carried under dryout conditions, a limit exists for the maximum heat flux where the pipe operates without the onset of dryout for a specific groove density.en_US
dc.description.provenanceSubmitted by Burcu Böke (tburcu@bilkent.edu.tr) on 2019-02-11T12:30:16Z No. of bitstreams: 1 Effect_of_design_and_operating_parameters_on_the_thermal_performance_of_aluminum_flat_grooved_heat_pipes.pdf: 2872946 bytes, checksum: d8a38f0963ac6c8b8146b33407c0f0a9 (MD5)en
dc.description.provenanceMade available in DSpace on 2019-02-11T12:30:16Z (GMT). No. of bitstreams: 1 Effect_of_design_and_operating_parameters_on_the_thermal_performance_of_aluminum_flat_grooved_heat_pipes.pdf: 2872946 bytes, checksum: d8a38f0963ac6c8b8146b33407c0f0a9 (MD5) Previous issue date: 2018-03-05en
dc.embargo.release2020-03-05en_US
dc.identifier.doi10.1016/j.applthermaleng.2017.12.085en_US
dc.identifier.eissn1873-5606
dc.identifier.issn1359-4311
dc.identifier.urihttp://hdl.handle.net/11693/49250
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttps://doi.org/10.1016/j.applthermaleng.2017.12.085en_US
dc.source.titleApplied Thermal Engineeringen_US
dc.subjectFlat plate heat pipeen_US
dc.subjectGrooved wicken_US
dc.subjectThermal performanceen_US
dc.subjectFilling ratioen_US
dc.subjectDryouten_US
dc.titleEffect of design and operating parameters on the thermal performance of aluminum flat grooved heat pipesen_US
dc.typeArticleen_US

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