The study on the allowing angle of the sun´s rays of concentrated photovoltaic (CPV) concentrator

This paper aims on the design and simulation of increasing the allowing angle a of the sun´s rays applied in Fresnel lens of concentrated photovoltaic (CPV) concentrator. Contrasting to the pursuit of high efficient and high ratio in general system design, this paper proceeds the design of increasing the allowing angle of the sun´s rays; contrasting to using planar Fresnel lens, this paper provides a composite diffraction optical elements DOE-Hybrid which is dome shaped structure and makes some designs in its interior. The result shows by using of solid hemispherical lens with diffraction optical elements (DOE) that mentioned in this paper, the purpose of getting larger allowing angle of the sun´s rays can be achieved. The allowing angle of the sun´s rays can reach up to 1° in the design of this paper, better than the other marketing systems that most to 0.7° only.