The Impact of the Parabolic Dish Concentrator on the Wind Induced Heat Loss From Its Receiver

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aut.relation.endpage101
aut.relation.journalSolar Energyen_NZ
aut.relation.startpage95
aut.relation.volume151en_NZ
aut.researcherAnderson, Timothy
dc.contributor.authorUzair, Men_NZ
dc.contributor.authorAnderson, TNen_NZ
dc.contributor.authorNates, RJen_NZ
dc.date.accessioned2017-05-25T23:49:59Z
dc.date.available2017-05-25T23:49:59Z
dc.date.copyright2017-07-15en_NZ
dc.date.issued2017-07-15en_NZ
dc.description.abstractAbstract To achieve higher operating temperatures, power output and system efficiencies in parabolic dish cavity receivers, larger dish sizes and structures are used to increase the concentration ratio. This increases capital investment and installation costs, which in turn places a much stronger emphasis on accurately predicting the performance of the system and the heat loss from it. Numerous studies have investigated the natural convection heat losses from cavity receivers, and some have examined a cavity exposed to wind. However, the effect of the dish on the wind flow and subsequently the heat loss from the receiver has not been widely considered. In this work, computational fluid dynamics was used to model the flow of air around a parabolic dish concentrator operating at varying angles of operation. The flow fields were validated using wind tunnel testing and published data regarding the aerodynamic characteristics of parabolic dishes. The results showed that the orientation of the dish has a significant effect on the flow structure near the receiver. Subsequently, using the validated method, the convective heat loss from the receiver of a large parabolic dish system was determined for a range of operating conditions. The results support the assertion that the flow characteristics near the cavity receiver aperture depend strongly on the orientation of the dish structure. This resulted in the calculated heat loss being up to 40% lower than previous studies where the presence of the dish was included. As such, the wind flow around the dish needs to be accounted for when analyzing the performance of parabolic dish systems to avoid an overly conservative and hence more expensive design.en_NZ
dc.identifier.citationSolar Energy, 151, 95-101.
dc.identifier.doi10.1016/j.solener.2017.05.022en_NZ
dc.identifier.issn0038-092Xen_NZ
dc.identifier.urihttps://hdl.handle.net/10292/10492
dc.publisherElsevier
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0038092X17303997
dc.rightsCopyright © 2017 Elsevier Ltd. All rights reserved. This is the author’s version of a work that was accepted for publication in (see Citation). 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. The definitive version was published in (see Citation). The original publication is available at (see Publisher's Version).
dc.rights.accessrightsOpenAccessen_NZ
dc.subjectParabolic dishen_NZ
dc.subjectHeat lossen_NZ
dc.subjectWinden_NZ
dc.subjectCSPen_NZ
dc.titleThe Impact of the Parabolic Dish Concentrator on the Wind Induced Heat Loss From Its Receiveren_NZ
dc.typeJournal Article
pubs.elements-id280750
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Design & Creative Technologies
pubs.organisational-data/AUT/Design & Creative Technologies/Engineering, Computer & Mathematical Sciences
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