Abstract
As low concentrating photovoltaic is one of the efficient ways to improve the performance of current PV systems, improving their design is a significant task. Many Fresnel-lens based CPV systems have the problem related to low acceptance angle and due to this, the system requires high-precision solar tracking systems. In this work, to reduce the complexity of the Fresnel-based CPV systems a polycrystalline solar cells, which reduce the system cost, were used, ?-shaped optical system, which has high acceptance angle, was proposed and a dual-axis solar tracking system, which consume less energy, was obtained and the system was modeled in COMSOL Multiphysics. Optical efficiency of the ?-shaped optical systems by azimuth and altitude changes dramatically if the incidence angle is higher. In terms of the reflective surfaces, the optical efficiency of the optical system gets higher and optical efficiency is more than 80% at the range -22?<????<22? of the incidence angle. If incidence angle is lower, in our case is 5°, the motor power will be higher as the activation increment is more due to the system moves by 5°, but it takes less time compared to other incidence angles. The optical efficiency is more than 90% if the incidence angle is 20° and the system uses 17% less energy than if the incidence angle is 5?.