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Optical performance of inclined south-north single-axis tracked solar panels

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

Abstract

To investigate optical performance of the inclined south-north single-axis (ISN-axis, in short) tracked solar panels, a mathematical procedure to estimate the annual collectible radiation on fixed and tracked panels was suggested based on solar geometry and monthly horizontal radiation. For solar panels tracking about ISN-axis, the yearly optimal tilt-angle of ISN-axis for maximizing annual solar gain was about 3° deviating from the site latitude in most of China except in areas with poor solar resources, and the maximum annual collectible radiation on ISN-axis tracked panels was about 97–98% of that on dual-axis tracked panels; whereas for ISN-axis tracked panels with the tilt-angle of ISN-axis being adjusted four times in a year at three fixed tilt-angles, the annual collectible radiation was almost close to that on dual-axis tracked panels, the optimum date of tilt-angle adjustment of ISN-axis was 23 days from the equinoxes, and the optimum tilt-angle adjustment value for each adjustment was about 22°. Compared to fixed south-facing solar panels inclined at an optimal tilt-angle, the increase in the annual solar gain due to using ISN-axis sun tracking was above 30% in the areas with abundant solar resources and less than 20% in the areas with poor solar resources.

Suggested Citation

  • Li, Zhimin & Liu, Xinyue & Tang, Runsheng, 2010. "Optical performance of inclined south-north single-axis tracked solar panels," Energy, Elsevier, vol. 35(6), pages 2511-2516.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:6:p:2511-2516
    DOI: 10.1016/j.energy.2010.02.050
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    References listed on IDEAS

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