18 August 2010 Stationary SMS lenses for concentrating photovoltaics
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Abstract
This paper presents a novel approach regarding the design of stationary, non imaging, refractive lenses with high acceptance angles. A lens lies on a stationary aperture and as the sun moves throughout the day, the concentrated focal spot is tracked by a moving solar cell. The purpose of this work is to replace the 2-axis tracking of the sun with internal motion of the miniaturized solar cell inside the module. We show families of linear lenses with wide acceptance angles 60. and 30. achieving moderate concentrations of 10 - 30 suns. The lens is designed with a variation of the simultaneous multiple surface (SMS) technique which is combined with a genetic algorithm to optimize the free variables of the problem.
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Panagiotis Kotsidas, Eleni Chatzi, Vijay Modi, "Stationary SMS lenses for concentrating photovoltaics", Proc. SPIE 7785, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII, 77850C (18 August 2010); doi: 10.1117/12.863073; https://doi.org/10.1117/12.863073
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Lenses

Solar cells

Solar concentrators

Sun

Genetic algorithms

Lens design

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