Energy Research, Vol. 1, Issue 1, Dec  2017, Pages 22-36; DOI: 10.31058/ 10.31058/

Dual Axis and Single Axis Sun Tracking Maximal Energy Gain

Energy Research, Vol. 1, Issue 1, Dec  2017, Pages 22-36.

DOI: 10.31058/

Soulayman S. 1* , Hamoud M. 1

1 Applied Physics Department, Higher Institute for Applied Sciences and Technology, Damascus, Syria

Received: 12 December 2017; Accepted: 25 December 2017; Published: 14 January 2018

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The maximal possible energy gain in the case of dual axis and single axis sun tracking is calculated basing on Hottel clear sky radiation model (HM) and extraterrestrial solar radiation model (ESRM). An experimental setup was designed and constructed for theoretical results verification. It was found that, the maximum possible energy gain calculated basing on HM and ESRM are practically identic either with reference to the horizontal surface or with reference to arbitrary tilted surface. The experimental results show that HM and ESRM can be used for calculating the energy gain. For example, on 25 August from 8 O’clock to solar noon, the hourly energy gain values of HM and ESRM are 1.672, 1.336, 1.170, 1.098 and 1.097 while the corresponding measured values on the same day are 1.746, 1.36, 1.16, 1.043 and 1.027. Thus, the theoretical data are consistent with the measured ones. It is proved that, the tilt angle of the single axis tracked surface with reference to the horizon is equal to absolute value of difference between the latitude angle and the declination angle.


Sun Tracking, Single Axis, Dual Axis, Clear Sky, Hottel Model, Extraterrestrial Model, Experimental Results


© 2017 by the authors. Licensee International Technology and Science Press Limited. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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