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Proceedings Paper

XRX-Köhler optical design and illumination optimization
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Paper Abstract

This paper describes the optical and illumination design of a CPV solar energy system. The challenges of creating a highly efficient yet low-cost system architecture come from many sources, but are primarily limited by the photoelectron conversion efficiency of the cells and the illumination performance of the system for on-axis and off-axis pointing scenarios. Furthermore, the need for high solar spectral throughput, evenly concentrated sunlight, and tolerance to offaxis pointing places strict illumination requirements on the optical design. To be commercially viable, the cost associated with all components must be minimized so that when taken together, the absolute installed cost of the system in kWh is lower than any other solar energy method. We present two low-cost optical design embodiments of a dishbased concentration photovoltaic (CPV) system that utilize Köhler illumination to achieve good illumination uniformity across an array of solar cells. Further optimization for active shadowing compensation and compound electrical I-V curve modeling for the solar cell array is performed that allows realistic off-axis performance scenarios to be modeled with the correct power response sensitivity.

Paper Details

Date Published: 17 December 2014
PDF: 10 pages
Proc. SPIE 9293, International Optical Design Conference 2014, 929312 (17 December 2014); doi: 10.1117/12.2073205
Show Author Affiliations
Blake Coughenour, College of Optical Sciences, The Univ. of Arizona (United States)
Roger Angel, College of Optical Sciences, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 9293:
International Optical Design Conference 2014
Mariana Figueiro; Scott Lerner; Julius Muschaweck; John Rogers, Editor(s)

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