Influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiver

dc.contributor.authorMwesigye, Aggrey
dc.contributor.authorHuan, Zhongjie
dc.contributor.authorBello-Ochende, Tunde
dc.contributor.authorMeyer, Josua P.
dc.date.accessioned2016-08-05T09:34:56Z
dc.date.issued2016-10
dc.description.abstractThis paper presents results of an investigation covering the influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough system. The optical performance was evaluated by using Monte Carlo ray tracing for slope errors and specularity errors in the range 0 to 5 mrad. A parabolic trough collector (PTC) with a rim angle of 80o and a concentration ratio of 86 was considered in this study. The heat flux profiles obtained from the optical analysis were coupled with a computational fluid dynamics tool (ANSYS FLUENT) to numerically investigate the thermal and thermodynamic performance of the receiver. In the numerical analysis, inlet temperatures and Reynolds numbers ranging from 350 K–650 K and 6 800–1 140 000 were considered, respectively. Results show that, slope and specularity errors influence the heat flux distribution on the receiver’s absorber tube. Results further show that the optical performance and thermal performance reduce significantly as the slope errors increase. For the range of parameters considered, the intercept factor reduces by up to 21% while the overall thermal efficiency reduces by up to 17% as optical errors increase. Receiver thermodynamic performance is shown to deteriorate as slope errors increase.en_ZA
dc.description.departmentMechanical and Aeronautical Engineeringen_ZA
dc.description.embargo2017-10-31
dc.description.librarianhb2016en_ZA
dc.description.sponsorshipNational Research Foundation (NRF).en_ZA
dc.description.urihttp://www.elsevier.com/locate/soleneren_ZA
dc.identifier.citationMwesigye, A, Huan, Z, Bello-Ochende, T & Meyer, JP 2016, 'Influence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiver', Solar Energy, vol. 135, pp. 703-718.en_ZA
dc.identifier.issn0038-092X
dc.identifier.other10.1016/j.solener.2016.06.045
dc.identifier.urihttp://hdl.handle.net/2263/56222
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2016 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Solar Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solar Energy, vol. 135, pp. 703-718, 2016. doi : 10.1016/j.solener.2016.06.045.en_ZA
dc.subjectEntropy generationen_ZA
dc.subjectOptical errorsen_ZA
dc.subjectThermal performanceen_ZA
dc.subjectThermodynamic performanceen_ZA
dc.subjectParabolic trough collector (PTC)en_ZA
dc.subject.otherEngineering, built environment and information technology articles SDG-07
dc.subject.otherSDG-07: Affordable and clean energy
dc.subject.otherEngineering, built environment and information technology articles SDG-09
dc.subject.otherSDG-09: Industry, innovation and infrastructure
dc.titleInfluence of optical errors on the thermal and thermodynamic performance of a solar parabolic trough receiveren_ZA
dc.typePostprint Articleen_ZA

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