Determination of the optimal tilt angle for a tilted solar panel in Kathmandu, Nepal using isotropic model
- 1St. Xavier's College, Maitighar, Kathmandu, Nepal
- 2Department of Physics, St. Xavier's College, Maitighar, Kathmandu, Nepal
- 3Department of Physics, St. Xavier's College, Maitighar, Kathmandu, Nepal
Res. J. Physical Sci., Volume 7, Issue (2), Pages 8-14, May,4 (2019)
Different types of geographical and climatological parameters are necessary to evaluate the performance of a solar panel. A solar device will perform efficiently if it receives maximum solar radiation throughout the day. To achieve this, the angle of tilt of the panel should be optimized periodically. This project aims to calculate the optimal angle oftilt for any solar panel located in Kathmandu (27.7°N latitude) for every month using Liu and Jordan's Isotropic Model. The monthly and the annual optimum tilt angles are calculated for a south facing tilted surface which are almost equivalent to the latitude of the site. Further, the optimum tilt angle decreases from a peak value of 28° in January to a minimum of 20° in July and again rises to a maximum of 28° in December. It is found that the tilt angle should be optimized annually or monthly in order to boost the effectiveness of the sun oriented collector as opposed to setting it on the level ground which is the usual practice. However, there will be an annual loss of 0.0714% in irradiance if the optimization process is conducted annually instead of monthly.
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