Comparative study of heat transfer enhancement using different fins in semi-circular absorber tube for large-aperture trough solar concentrator

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorGong, Jing hu
dc.contributor.authorWang, Jun
dc.contributor.authorLund, Peter D.
dc.contributor.authorZhao, Dan dan
dc.contributor.authorXu, Jing wen
dc.contributor.authorJin, Yi hao
dc.contributor.departmentSoutheast University, Nanjing
dc.contributor.departmentNew Energy Technologies
dc.contributor.departmentDepartment of Applied Physicsen
dc.date.accessioned2021-03-03T07:36:35Z
dc.date.available2021-03-03T07:36:35Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2023-02-02
dc.date.issued2021-05
dc.description.abstractAn improved evacuated absorber tube (AT) design consisting of a semi-circular tube is proposed for large-aperture parabolic trough concentrator. The absorber tube also contains a flat-plate radiation shield in the vacuum part of the tube in the glass cover. To enhance the heat transfer in the AT, different fins geometries added to the bottom of the AT were analyzed here. Compared to an AT without fins, the thermal efficiency of the tube could be increased from 75.7% to 76.9% with a short and thick fin and to 77.3% with a long and thin fin in the flow velocity range of 0.4–1.5 m/s. The long and thin finned AT shows better enhancement of heat transfer, but the heat transfer performance factor also accounting for frictional losses is higher for short and thick fin. Simultaneously, increasing the number of long and thin fins in the AT would not improve much the heat transfer performance.en
dc.description.versionPeer revieweden
dc.format.extent13
dc.format.extent1229-1241
dc.format.mimetypeapplication/pdf
dc.identifier.citationGong , J H , Wang , J , Lund , P D , Zhao , D D , Xu , J W & Jin , Y H 2021 , ' Comparative study of heat transfer enhancement using different fins in semi-circular absorber tube for large-aperture trough solar concentrator ' , Renewable Energy , vol. 169 , pp. 1229-1241 . https://doi.org/10.1016/j.renene.2020.12.054en
dc.identifier.doi10.1016/j.renene.2020.12.054
dc.identifier.issn0960-1481
dc.identifier.otherPURE UUID: 81556c1c-336e-4b27-9ac4-2efe826c3167
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/81556c1c-336e-4b27-9ac4-2efe826c3167
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85100263625&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/56576799/SCI_Gong_Comparative_study_of_heat_transfer_enhancement_using_different_fins_in_semi_circular_absorber_tube_for_large_aperture_trough_solar_concentrator.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/102912
dc.identifier.urnURN:NBN:fi:aalto-202103032200
dc.language.isoenen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofseriesRenewable Energyen
dc.relation.ispartofseriesVolume 169en
dc.rightsopenAccessen
dc.subject.keywordFin
dc.subject.keywordFlat-plate radiation shield
dc.subject.keywordHeat transfer
dc.subject.keywordLarge-aperture parabolic trough concentrator
dc.subject.keywordSemi-circular absorber tube
dc.titleComparative study of heat transfer enhancement using different fins in semi-circular absorber tube for large-aperture trough solar concentratoren
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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