18 August 2010 Secondary optics for Fresnel lens solar concentrators
Author Affiliations +
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 Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ling Fu, Ling Fu, Ralf Leutz, Ralf Leutz, Hans Philipp Annen, Hans Philipp Annen, } "Secondary optics for Fresnel lens solar concentrators", Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 778509 (18 August 2010); doi: 10.1117/12.860438; https://doi.org/10.1117/12.860438
PROCEEDINGS
6 PAGES


SHARE
Back to Top