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Optical performance of vertical single-axis tracked solar panels

Author

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  • Li, Zhimin
  • Liu, Xinyue
  • Tang, Runsheng

Abstract

To investigate the optical performance of the vertical single-axis (v-axis, in short) tracked solar panels as compared with fixed and full 2-axis tracked solar panels, a mathematical procedure to estimate the annual collectible radiation on fixed and tracked panels is suggested based on the monthly horizontal radiation. Calculation results showed that the yearly optimal tilt-angle of a v-axis tracked solar panel for maximizing the annual energy collection was almost linearly proportional to the site latitude, and the corresponding maximum annual collectible radiation on such tracked panel was about 96% of solar radiation annually collected by a dual-axis tracked panel. Compared with a traditional fixed south-facing solar panel inclined at the optimal tilt-angle, the annual collectible radiation due to the use of the v-axis sun-tracking was increased by 28% in the areas with abundant solar resources and increased by16% in the areas with poor solar resources. An empirical correlation for a quick estimation of yearly optimal tilt-angles of v-axis tracked solar panels was also proposed based on climatic data of 31 sites in China.

Suggested Citation

  • Li, Zhimin & Liu, Xinyue & Tang, Runsheng, 2011. "Optical performance of vertical single-axis tracked solar panels," Renewable Energy, Elsevier, vol. 36(1), pages 64-68.
    • Handle: RePEc:eee:renene:v:36:y:2011:i:1:p:64-68
    DOI: 10.1016/j.renene.2010.05.020
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    References listed on IDEAS

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    1. Chang, Tian Pau, 2009. "Performance study on the east–west oriented single-axis tracked panel," Energy, Elsevier, vol. 34(10), pages 1530-1538.
    2. Chang, Tian Pau, 2009. "The gain of single-axis tracked panel according to extraterrestrial radiation," Applied Energy, Elsevier, vol. 86(7-8), pages 1074-1079, July.
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    5. Morcos, V.H., 1994. "Optimum tilt angle and orientation for solar collectors in Assiut, Egypt," Renewable Energy, Elsevier, vol. 4(3), pages 291-298.
    6. Tang, Runsheng & Wu, Tong, 2004. "Optimal tilt-angles for solar collectors used in China," Applied Energy, Elsevier, vol. 79(3), pages 239-248, November.
    Full references (including those not matched with items on IDEAS)

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