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Experimental investigation of the conduit slope impact on mixed convection in solar collectors

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dc.citedby2
dc.contributor.authorAl-Sammarraie A.T.en_US
dc.contributor.authorAl-Jethelah M.en_US
dc.contributor.authorIbrahim T.K.en_US
dc.contributor.authorSalimpour M.R.en_US
dc.contributor.authorAlnaimi F.B.I.en_US
dc.contributor.authorid57195757756en_US
dc.contributor.authorid57190136695en_US
dc.contributor.authorid36730964600en_US
dc.contributor.authorid55892618200en_US
dc.contributor.authorid58027086700en_US
dc.date.accessioned2024-10-14T03:20:41Z
dc.date.available2024-10-14T03:20:41Z
dc.date.issued2023
dc.description.abstractAn experimental investigation on the mixed convection heat transfer of air flowing in circular conduits of a solar collector is conducted. The test rig consists of three different copper pipes with a length of 70 cm. The pipes are heated at constant heat flux. The effect of the pipe inclination angle (? = 0�, 60�, and 90�), length-to-diameter ratio (L/D = 13.8, 18.4, and 36.7), and heat rate (Q = 5, 11, 19.6, 30, 40.5, and 57.8 W) is studied in the present study. The influences of Richardson number (Ri), inclination angle, and length-to-diameter ratio on the average Nusselt number are examined as well. The results show that the Nusselt number (Nu) is improved by 41.5% as the inclination angle is changed from 0� to 90� at L/D = 13.8. Further, as the length-to-diameter ratio was reduced from 36.7 to 13.8 at 90�, up to 54.9% enhancement in heat transfer is found. Also, it is seen that by increasing the heat rate from 5 W to 57.8 W at 90� and L/D = 13.8, the exchange in heat is improved by 44%. Three empirical correlations were proposed for each studied pipe inclination angle. A good agreement was found between the measured Nu and the calculated Nu from the proposed correlations. � 2023 Taylor & Francis Group, LLC.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1080/15567036.2023.2210084
dc.identifier.epage6692
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85163042294
dc.identifier.spage6678
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85163042294&doi=10.1080%2f15567036.2023.2210084&partnerID=40&md5=1a84c49e30e849cad13892b31f66395a
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/34564
dc.identifier.volume45
dc.pagecount14
dc.publisherTaylor and Francis Ltd.en_US
dc.sourceScopus
dc.sourcetitleEnergy Sources, Part A: Recovery, Utilization and Environmental Effects
dc.subjectexperimental
dc.subjectinclined pipe
dc.subjectMixed convection
dc.subjectsolar collector
dc.subjectuniform heat flux
dc.subjectCopper pipe
dc.subjectHeat flux
dc.subjectNusselt number
dc.subjectSolar collectors
dc.subjectCircular conduit
dc.subjectExperimental
dc.subjectExperimental investigations
dc.subjectHeat rate
dc.subjectInclination angles
dc.subjectInclined pipes
dc.subjectLength to diameter ratio
dc.subjectMixed convection heat transfers
dc.subjectPipe inclinations
dc.subjectUniform heat flux
dc.subjectMixed convection
dc.titleExperimental investigation of the conduit slope impact on mixed convection in solar collectorsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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