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Proceedings Paper

Photovoltaic performance of the dome-shaped Fresnel-Köhler concentrator
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Paper Abstract

In order to have a cost-effective CPV system, two key issues must be ensured: high concentration factor and high tolerance. The novel concentrator we are presenting, the dome-shaped Fresnel-Köhler, can widely fulfill these two and other essential issues in a CPV module. This concentrator is based on two previous successful CPV designs: the FK concentrator with a flat Fresnel lens and the dome-shaped Fresnel lens system developed by Daido Steel, resulting on a superior concentrator. The concentrator has shown outstanding simulation results, achieving an effective concentration-acceptance product (CAP) value of 0.72, and an optical efficiency of 85% on-axis (no anti-reflective coating has been used). Moreover, Köhler integration provides good irradiance uniformity on the cell surface and low spectral aberration of this irradiance. This ensures an optimal performance of the solar cell, maximizing its efficiency. Besides, the domeshaped FK shows optimal results for very compact designs, especially in the f/0.7-1.0 range. The dome-shaped Fresnel- Köhler concentrator, natural and enhanced evolution of the flat FK concentrator, is a cost-effective CPV optical design, mainly due to its high tolerances. Daido Steel advanced technique for demolding injected plastic pieces will allow for easy manufacture of the dome-shaped POE of DFK concentrator.

Paper Details

Date Published: 10 October 2012
PDF: 7 pages
Proc. SPIE 8468, High and Low Concentrator Systems for Solar Electric Applications VII, 84680D (10 October 2012); doi: 10.1117/12.929698
Show Author Affiliations
Pablo Zamora, Univ. Politécnica de Madrid (Spain)
Pablo Benítez, Univ. Politécnica de Madrid (Spain)
Light Prescriptions Innovators, LLC (United States)
Li Yang, Univ. Politécnica de Madrid (Spain)
Juan Carlos Miñano, Univ. Politécnica de Madrid (Spain)
Light Prescriptions Innovators, LLC (United States)
Joao Mendes-Lopes, Univ. Politécnica de Madrid (Spain)
Kenji Araki, Daido Steel (Japan)


Published in SPIE Proceedings Vol. 8468:
High and Low Concentrator Systems for Solar Electric Applications VII
Kaitlyn VanSant; Adam P. Plesniak, Editor(s)

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