Sun Tracker

 

Purpose of a Sun Tracker

Global warming and cost of fossil fuels has increased the demand for alternative energy produced by renewable sources like solar power, wind power and hydroelectricity. Improvement and efficiency enhancement of solar generated power is achieved by the development of better photo voltaic (PV) cell materials. But also, to improve the Photo Voltaic efficiency is by having the sun exposure to the solar panels at the best sun's ray angle of incidence on the PV cells. Since the earth's rotation and the earth's Translation are ever changing sun ray angles of incidence over a stationary cell, the optimization of sun exposure is achieved by rotating and oscillating the PV panel in such a way that its sun ray angle of incidence is always the same for the "sun" hours.

 

 

Single axis solutions are meant to achieve the optimum exposure angle for the earth translation (change of seasons). They have the most benefit with reference to a fix tilt array of panels by providing improvement of Solar Radiation up to 32% while implies a very simple additional mechanism to the array and an operations software resulting in a low maintenance cost.

 

Dual axis solutions are designed for arrays that can be mount on a central post and programmed to achieve the optimum exposure angle for the earth translation (change of seasons) and also to adjust to angle exposure to earth rotation (dusk to dawn motion). They improve Solar Radiation over a single axis solution about an extra 7%.