Integration of an on-axis general sun-tracking formula in the algorithm of an open-loop sun-tracking system

Integration of an on-axis general sun-tracking formula in the algorithm of an open-loop sun-tracking system

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 m(2) prototype solar concentrator have been analyzed from recorde...

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Veröffentlicht in:Sensors (Basel, Switzerland) Switzerland), 2009-10, Vol.9 (10), p.7849-7865
Hauptverfasser: Chong, Kok-Keong, Wong, Chee-Woon, Siaw, Fei-Lu, Yew, Tiong-Keat, Ng, See-Seng, Liang, Meng-Suan, Lim, Yun-Seng, Lau, Sing-Liong
Format: Artikel
Sprache:eng
Schlagworte:
Accuracy
Algorithms
azimuth-elevation
Cameras
Computers
Controllers
general sun-tracking formula
Monitoring systems
passive sensors
Sensors
solar collector
solar concentrator
Solar energy
Sun
sun-tracking accuracy
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Zusammenfassung: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 m(2) 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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s91007849