Influence of Diverging Lens on the Efficiency of a Solar Module under Low Intensity Solar Radiation

Abstract

The relevance of solar energy as a source of renewable energy cannot be over-emphasized at both household, local, national and global levels. Therefore, the utilization of optical devices such as lenses has been proposed to enhance solar module performance under sub-optimal solar conditions. The module's overall efficiency was determined by the cell efficiency and placement inside it, as well as the laminating materials employed. Diverging lenses in particular, have shown promise in reducing solar intensity and increasing angular tolerance. This study was carried out in Umuahia North to ascertain the impact of diverging lens on the efficiency of a typical solar module at a relative low solar intensity. This study used the experimental technique, secondary data, and an empirical research study. The study takes into account the shadow conditions, solar hour duration, and tilt angle. The study concluded that a diverging lens reduces the efficiency of a solar module by spreading incoming light rays away from the focal point, resulting in a lower intensity of light reaching the solar cells due to reduced focal concentration, increased reflection and dispersion, lower voltage and current generation, and potential mismatch under optimal operating conditions.