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Sensors 2009, 9(10), 7849-7865; doi:10.3390/s91007849

Integration of an On-Axis General Sun-Tracking Formula in the Algorithm of an Open-Loop Sun-Tracking System

Faculty of Engineering and Science, Universiti Tunku Abdul Rahman,Off Jalan Genting Kelang, Setapak, 53300 Kuala Lumpur, Malaysia
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Received: 29 July 2009 / Revised: 19 August 2009 / Accepted: 28 September 2009 / Published: 30 September 2009
(This article belongs to the Section Chemical Sensors)
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Abstract

A novel on-axis general sun-tracking formula has been integrated in the algorithm of an open-loop sun-tracking system in order to track the sun accurately and cost effectively. Sun-tracking errors due to installation defects of the 25 m2 prototype solar concentrator have been analyzed from recorded solar images with the use of a CCD camera. With the recorded data, misaligned angles from ideal azimuth-elevation axes have been determined and corrected by a straightforward changing of the parameters’ values in the general formula of the tracking algorithm to improve the tracking accuracy to 2.99 mrad, which falls below the encoder resolution limit of 4.13 mrad. View Full-Text
Keywords: general sun-tracking formula; azimuth-elevation; sun-tracking accuracy; passive sensors; solar concentrator; solar collector general sun-tracking formula; azimuth-elevation; sun-tracking accuracy; passive sensors; solar concentrator; solar collector
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Chong, K.-K.; Wong, C.-W.; Siaw, F.-L.; Yew, T.-K.; Ng, S.-S.; Liang, M.-S.; Lim, Y.-S.; Lau, S.-L. Integration of an On-Axis General Sun-Tracking Formula in the Algorithm of an Open-Loop Sun-Tracking System. Sensors 2009, 9, 7849-7865.

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