Enhancing the overall thermal performance of a large aperture parabolic trough solar collector using wire coil inserts

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dc.authoridGOKSU, TAHA TUNA/0000-0003-2028-3362
dc.authoridYilmaz, Ibrahim Halil/0000-0001-7840-9162
dc.contributor.authorYilmaz, Ibrahim Halil
dc.contributor.authorMwesigye, Aggrey
dc.contributor.authorGoksu, Taha Tuna
dc.date.accessioned2025-01-06T17:44:35Z
dc.date.available2025-01-06T17:44:35Z
dc.date.issued2020
dc.description.abstractWith the use of large apertures (higher concentration ratios) in parabolic trough solar collectors, increased temperature gradients, increased heat losses and increased heat transfer irreversibilities become inevitable. As such, means of reducing the magnitude of these operating parameters to enhance the overall thermal and thermodynamic performances become crucial. In this study, the use of wire coil inserts in the receiver's absorber tube to improve the parabolic trough solar collector's performance and to lessen the associated temperature gradients is presented. The parabolic trough solar collector having an aperture width of 9 m and a rim angle of 80 degrees was modeled. Using Monte-Carlo ray tracing, the realistic heat flux profile on the receiver's absorber tube was obtained. The resulting non-uniform heat flux profile was later coupled to a finite volume based computational fluid dynamics model. The working fluid properties were considered to be temperature-dependent. The wire coil inserts with a pitch of 0.076, 0.114 and 0.152 m and widths of 0.03, 0.033 and 0.036 m were examined in this study. The wire coil has a triangular cross-section of 0.0076 m in size. Results show significant improvements in receiver thermal performance with the use of wire coil inserts owing to the improved fluid mixing, disruption of the thermal boundary layer and reduction in the absorber tube temperatures. The heat transfer performance is increased up to 183% whereas the thermal efficiency improves between 0.4 and 1.4% when the flow rate is below 13 m(3)/h.
dc.description.sponsorshipDepartment of Mechanical and Industrial Engineering at the University of Minnesota Duluth, United States; Department of Mechanical Engineering at Adana Alparslan Turkes Science and Technology University, Turkey
dc.description.sponsorshipDr. Mwesigye acknowledges the support received from the Department of Mechanical and Industrial Engineering at the University of Minnesota Duluth, United States. Dr. Yilmaz acknowledges the support received from the Department of Mechanical Engineering at Adana Alparslan Turkes Science and Technology University, Turkey.
dc.identifier.doi10.1016/j.seta.2020.100696
dc.identifier.issn2213-1388
dc.identifier.issn2213-1396
dc.identifier.scopus2-s2.0-85082832710
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.seta.2020.100696
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3104
dc.identifier.volume39
dc.identifier.wosWOS:000537703500007
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofSustainable Energy Technologies and Assessments
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectThermal performance
dc.subjectParabolic trough receiver
dc.subjectWire coil insert
dc.subjectTemperature gradient
dc.subjectThermal efficiency
dc.subjectEntropy generation
dc.titleEnhancing the overall thermal performance of a large aperture parabolic trough solar collector using wire coil inserts
dc.typeArticle

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