High concentration non-imaging Fresnel lens design with flat upper surface

Atsushi Akisawa; Takayuki Sato; Takahiko Miyazaki; Takao Kashiwagi; Masao Hiramatsu

doi:10.1117/12.734115

11 September 2007 High concentration non-imaging Fresnel lens design with flat upper surface

Atsushi Akisawa, Takayuki Sato, Takahiko Miyazaki, Takao Kashiwagi, Masao Hiramatsu

Proceedings Volume 6649, High and Low Concentration for Solar Electric Applications II; 66490F (2007) https://doi.org/10.1117/12.734115
Event: Solar Energy + Applications, 2007, San Diego, California, United States

Abstract

Concentration PV systems are emerging recently and primary lenses have been developed for concentrating solar incident. Although the authors already produced 500X dome-shaped Fresnel lens, its production process was complicated because of the shape. The objective of this study is to investigate new design method for non-imaging Fresnel with flat upper surface so that the production can be easier. The design of prisms is formulated by means of non-linear optimization to have maximum acceptance half angle with edge-ray principle. It is shown that designing more than 500X flat Fresnel lens is possible. The study also presents optimal condition of lens size requiring energy payback year to satisfy from the viewpoint of life cycle energy production and consumption.

Citation Download Citation

Atsushi Akisawa, Takayuki Sato, Takahiko Miyazaki, Takao Kashiwagi, and Masao Hiramatsu "High concentration non-imaging Fresnel lens design with flat upper surface", Proc. SPIE 6649, High and Low Concentration for Solar Electric Applications II, 66490F (11 September 2007); https://doi.org/10.1117/12.734115

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