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Uniform sunlight concentration reflectors for photovoltaic cells

机译：用于光伏电池的均匀阳光集中反射器

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摘要

Sunlight concentration is essential to reach high temperatures of a working fluid in solar-thermal applications and to reduce the cost of photovoltaic (PV) electricity generation systems. Commonly, sunlight concentration is realized by parabolic or cylindrical reflectors, which do not provide uniform concentration on the receiver finite surface. Uniform concentration of sunlight is favored especially for the PV conversion applications since it not only enhances the conversion efficiency of sunlight but also reduces the thermal variations along the receiving PV cell, which can be a performance and life-span limiting factor. In this paper a reflector profile that uniformly infiltrates the concentrated sunlight into the receiving unit is attempted. The new design accounts for all factors that contribute to the nonuniform concentration, like the reflector curvature, which spatially reflects the sunlight nonuniformly, and the angular dependency of both the reflector reflectivity and the sunlight transmission through the PV cell.
机译：阳光聚集对于在太阳热应用中达到工作流体的高温以及降低光伏（PV）发电系统的成本至关重要。通常，阳光聚集是通过抛物线或圆柱反射器实现的，它们在接收器有限的表面上不能提供均匀的聚集。尤其是对于PV转换应用，尤其有利于太阳光的均匀集中，因为它不仅可以提高太阳光的转换效率，还可以减少沿接收PV电池的热变化，这可能是性能和寿命的限制因素。在本文中，尝试了一种反射器轮廓，该轮廓将集中的阳光均匀地渗透到接收单元中。新的设计考虑了所有导致不均匀浓度的因素，例如反射器曲率，该反射器曲率在空间上不均匀地反射太阳光，以及反射器反射率和太阳光透过PV电池的角度依赖性。

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