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Proceedings Article

Secondary optics for Fresnel lens solar concentrators

[+] Author Affiliations
Ling Fu, Ralf Leutz, Hans Philipp Annen

Concentrator Optics GmbH (Germany)

Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 778509 (August 18, 2010); doi:10.1117/12.860438
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From Conference Volume 7785

  • Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII
  • Roland Winston; Jeffrey M. Gordon
  • San Diego, California, United States | August 01, 2010

abstract

Secondary optics are used in concentrating photovoltaic (CPV) systems with Fresnel lens primaries to increase the optical system efficiency by catching refracted light that otherwise would miss the receiver, better the tracking tolerance (acceptance half-angle) and enhance the flux uniformity on the cell. Several refractive secondary optics under the same Fresnel lens primary are designed, analyzed and compared based on their optical performances, materials, manufacturability, manufacturing tolerancing and cost. The goal of this work is to show the basic two different design approaches statistical mixing as opposed to deterministic mixing. Caustics are elementary in the deterministic tailoring approach. We find that statistical mixing offers higher flexibility for the solar application. It is also shown that there are conventional, i.e. designs based on conic section ("half-egg") that work well as solar secondaries. It is also made clear that primary and secondary must be designed as optical train.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Ling Fu ; Ralf Leutz and Hans Philipp Annen
"Secondary optics for Fresnel lens solar concentrators", Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 778509 (August 18, 2010); doi:10.1117/12.860438; http://dx.doi.org/10.1117/12.860438


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