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|Title:||Design and construction of a one-axis sun-tracking system||Authors:||Kalogirou, Soteris A.||Keywords:||Tracking system||Issue Date:||1996||Publisher:||Elsevier B. V.||Source:||Solar Energy, Vol. 57, no. 6, 1996, pp. 465-469||Abstract:||This paper describes a tracking system which can be used with single-axis solar concentrating systems. The position and “status” of the Sun are detected by three light-dependent resistors (LDRs), one of which detects whether the collector is focused, whilst a second resistor determines if there is cloud cover, and the third senses whether it is day or night. The resultant signals are fed to an electronic control system which operates a low-speed 12-V d.c. motor which rotates the collector via a speed-reduction gearbox. The tracking system accuracy depends on the magnitude of the solar irradiance. The deviation from zero is 0.2 and 0.05° with solar radiation of 100 and 600 W m−2, respectively. Both values suggest that the mechanism can be used satisfactorily for parabolic trough collectors of medium to high concentration ratios.||URI:||http://ktisis.cut.ac.cy/handle/10488/232||ISSN:||0038-092X||DOI:||10.1016/S0038-092X(96)00135-1||Rights:||Copyright © 1997 Published by Elsevier Science Ltd.|
|Appears in Collections:||Άρθρα/Articles|
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