Optimum tilt and azimuth angles for fixed solar collectors in South Africa using measured data

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dc.contributor.author Le Roux, Willem Gabriel
dc.date.accessioned 2016-06-14T09:10:23Z
dc.date.issued 2016-10
dc.description.abstract The solar resource in South Africa is among the best in the world. South Africa has seen an increase in local and international investment in solar power. The optimum angles at which a solar collector should be fixed are often debated. Similar publications on this topic often rely on mathematical models of solar resource rather than measured data. Measured data is preferred since the effects of pollution and weather are included. In this work, recently measured data from nine measuring stations in the Southern African Universities Radiometric Network (SAURAN) equipped with pyranometers and pyrheliometers are considered. The data is used to calculate the annual solar insolation on fixed collectors at all possible installation angles. SolTrace, a ray-tracing software, is used for validation. Relative to horizontally-fixed collectors, the annual solar insolation is 10% more for optimally-fixed collectors and 45% more for solartracking collectors. The effects of tilt and azimuth angles are presented on contour plots, which are convenient for cost analysis and the determination of the annual insolation on building surfaces. The optimum azimuth angle is a function of the longitude angle minus the absolute latitude angle, which suggests that frontal and convective precipitation effects influence the optimum azimuth angle. en_ZA
dc.description.department Mechanical and Aeronautical Engineering en_ZA
dc.description.embargo 2017-10-31
dc.description.librarian hb2016 en_ZA
dc.description.uri http://www.elsevier.com/locate/renene en_ZA
dc.identifier.citation Le Roux, WG 2016, 'Optimum tilt and azimuth angles for fixed solar collectors in South Africa using measured data', Renewable Energy, vol. 96, pp. 603-612. en_ZA
dc.identifier.issn 0960-1481 (print)
dc.identifier.issn 1879-0682 (online)
dc.identifier.other 10.1016/j.renene.2016.05.003
dc.identifier.uri http://hdl.handle.net/2263/53117
dc.language.iso en en_ZA
dc.publisher Elsevier en_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 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. 96, pp. 603-612, 2016. doi : 10.1016/j.renene.2016.05.003. en_ZA
dc.subject Solar en_ZA
dc.subject Azimuth en_ZA
dc.subject Tilt en_ZA
dc.subject Optimum en_ZA
dc.subject Collector en_ZA
dc.subject South Africa (SA) en_ZA
dc.title Optimum tilt and azimuth angles for fixed solar collectors in South Africa using measured data en_ZA
dc.type Postprint Article en_ZA


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