Numerical analysis of the thermal and thermodynamic performance of a parabolic trough solar collector using SWCNTs-Therminol®VP-1 nanofluid

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dc.authoridMeyer, Josua/0000-0002-3675-5494
dc.authoridMwesigye, Aggrey/0000-0002-1054-6774
dc.authoridYilmaz, Ibrahim Halil/0000-0001-7840-9162
dc.contributor.authorMwesigye, Aggrey
dc.contributor.authorYilmaz, Ibrahim Halil
dc.contributor.authorMeyer, Josua P.
dc.date.accessioned2025-01-06T17:44:34Z
dc.date.available2025-01-06T17:44:34Z
dc.date.issued2018
dc.description.abstractIn this paper, energetic and exergetic performances of a parabolic trough solar collector using single walled carbon nanotubes (SWCNTs)-Therminol (R) VP-1 nanofluid were numerically investigated and presented. The main objective of this investigation was to determine the influence of high thermal conductivity SWCNTs suspended in the widely used heat transfer fluid, Therminol (R) VP-1 on the performance indicators of the parabolic trough solar collector. A parabolic trough system with a high concentration ratio of 113 was analyzed in this study. The thermo-physical properties of SWCNTs were taken as functions of nanotube length, nanotube diameter, and temperature, while the properties of Therminol (R) VP-1 were considered to be temperature dependent. The study involved determination of the actual heat flux profile through Monte Carlo ray tracing and the subsequent coupling of this heat flux profile to a computational fluid dynamics tool using user defined functions. The computational fluid dynamics tool was finite volume based, and the realizable k-epsilon model together with enhanced wall treatment were used for turbulence modeling. The entropy generation rates were obtained directly from the local velocity and temperature fields of the computed domain and later used in the exergy analysis. Results showed that although the heat transfer performance significantly improved with the use of SWCNTs, the increase in the thermal efficiency was not substantial. For the considered range of parameters, while the heat transfer performance increased up to 234%, the thermal efficiency increased around 4.4% as the volume fraction increased from 0 to 2.5%. The corresponding reduction in the entropy generation was about 70%. (C) 2017 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipNational Research Foundation of South Africa [9927]; school of Mechanical, Industrial and Aeronautical Engineering at the University of the Witwatersrand; Department of Automotive Engineering at Adana Science and Technology University; University of Pretoria
dc.description.sponsorshipThis work is based on the research supported in part by the National Research Foundation of South Africa (Grant No. 9927). This support is duly acknowledged and appreciated. Dr. Mwesigye acknowledges the support received from the school of Mechanical, Industrial and Aeronautical Engineering at the University of the Witwatersrand, Dr. Yilmaz acknowledges the support received from the Department of Automotive Engineering at Adana Science and Technology University and Prof. Meyer duly acknowledges the support received from the University of Pretoria.
dc.identifier.doi10.1016/j.renene.2017.10.047
dc.identifier.endpage862
dc.identifier.issn0960-1481
dc.identifier.scopus2-s2.0-85032178647
dc.identifier.scopusqualityQ1
dc.identifier.startpage844
dc.identifier.urihttps://doi.org/10.1016/j.renene.2017.10.047
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3088
dc.identifier.volume119
dc.identifier.wosWOS:000423649700076
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofRenewable Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectSWCNT
dc.subjectParabolic trough receiver
dc.subjectMonte Carlo ray tracing
dc.subjectThermal efficiency
dc.subjectExergetic performance
dc.titleNumerical analysis of the thermal and thermodynamic performance of a parabolic trough solar collector using SWCNTs-Therminol®VP-1 nanofluid
dc.typeArticle

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