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Abstract
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| In this paper, we present the Hybrid L-CPV concept, which mixes conventional CPV technology with illumination using low-cost fiber optics as light distributor. This approach may offer a significant increase in the value of a CPV system for a minimal cost increase. Since illumination from sunlight with fibers does not require energy conversion, the losses are limited to those within the fibers, allowing for efficient lighting using just small area of the CPV system. At the same time the need of concentration and tracking required by a fiber-based illumination system is fully covered by the infrastructure of the CPV system. In this work, we present a theoretical study of the losses in optical fibers in order to understand and characterize them, as well an experimental confirmation of these results with low cost PMMA fibers. It is found that the highest the f-number of the concentrating lens, the less losses but this value is also limited by the compactness of the receptor, the f-number of cell lens and the optical efficiency of the lens. PMMA softening at 85 ºC limits maximum concentration to 100X which simultaneously avoids using any secondary optical element for the lighting portion of the system. | |
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International
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Si |
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Congress
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26th European Photovoltaic Solar Energy Conference and Exhibition |
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960 |
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Place
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Hamburgo, Alemania |
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Reviewers
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Si |
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ISBN/ISSN
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3-936338-27-2 |
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10.4229/26thEUPVSEC2011-1BO.11.5 |
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Start Date
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05/09/2011 |
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End Date
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09/09/2011 |
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From page
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148 |
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To page
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152 |
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Proceedings of 26th European Photovoltaic Solar Energy Conference and Exhibition |