Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins

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dc.contributor.author Ngo, L.C.
dc.contributor.author Bello-Ochende, Tunde
dc.contributor.author Meyer, Josua P.
dc.date.accessioned 2015-12-14T06:23:25Z
dc.date.issued 2015-02
dc.description.abstract This study details the numerical modelling and optimization of natural convection heat suppression in a solar cavity receiver with plate fins. The use of plate fins attached to the inner aperture surface is presented as a possible low cost means of suppressing natural convection heat loss in a cavity receiver. In the first part of the study a three-dimensional numerical model that captures the heat transfer and flow processes in the cavity receiver is analyzed, and the possibilities of optimization were then established. The model is laminar in the range of Rayleigh number, inclination angle, plate height and thickness considered. In the second part of the study, the geometric parameters considered were optimized using optimization programme with search algorithm. The results indicate that significant reduction on the natural convection heat loss can be achieved from cavity receivers by using plate fins, and an optimal plate fins configuration exit for minimal natural convection heat loss for a given range of Rayleigh number. Reduction of up to a maximum of 20% at 0 receiver inclination was observed. The results obtained provide a novel approach for improving design of cavity receiver for optimal performance. en_ZA
dc.description.embargo 2016-02-28
dc.description.librarian hb2015 en_ZA
dc.description.sponsorship Department of Mechanical and Aeronautical Engineering, University of Pretoria and the National Research Foundation. en_ZA
dc.description.uri http://www.elsevier.com/locate/renene en_ZA
dc.identifier.citation Ngo, LC, Bello-Ochende, T & Meyer, JP 2015, 'Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins', Renewable Energy, vol. 74, pp. 95-105. en_ZA
dc.identifier.issn 0960-1481 (print)
dc.identifier.issn 1879-0682 (online)
dc.identifier.other 10.1016/j.renene.2014.07.047
dc.identifier.uri http://hdl.handle.net/2263/51166
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2014 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Renewable 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 Renewable Energy, vol. 74, pp. 95-105, 2015. doi : 10.1016/j.renene.2014.07.047. en_ZA
dc.subject Parabolic dish en_ZA
dc.subject Cavity receiver en_ZA
dc.subject Natural convection en_ZA
dc.subject Plate fin en_ZA
dc.subject Rayleigh number en_ZA
dc.title Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins en_ZA
dc.type Postprint Article en_ZA


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