Multi-wavelength multi-focus Fresnel solar concentrator with square uniform irradiance: design and analysis

Jiang Yanru; Xie Qingkun; Qu Enshi; Ren Liyong; Liang Jian; Wang Ling

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Multi-wavelength multi-focus Fresnel solar concentrator with square uniform irradiance: design and analysis

机译：具有方形均匀辐照度的多波长多对焦菲涅耳太阳能集中器：设计和分析

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In this paper, a two-step optical design method is proposed to build a superior Fresnel-based photovoltaic concentrator for enhancing light conversion efficiency with the multi-junction solar cell. In the first step, we orthogonally segment a traditional Fresnel concentrator and remove the two normal stripe bands around the horizontal and vertical axes, as well as recombine the resultant four quadrants again. By using such a specific Fresnel concentrator design, a square light pattern can be constructed owing to the off-axis non-rotational symmetric superposition of light. In the second step, as for the response wavelengths of a specific triple-junction solar cell, we further carry out a triple-wavelength and multi-focus design of the above Fresnel concentrator for improving the uniformity of light distribution on the solar cell. To show the validity of this novel design method, a solar concentrator, with typical design parameters including the geometrical concentration ratio of 800x and the F-number of 0.775, is designed and simulated. As a result, theoretical irradiance uniformity up to 87% is obtained. In addition, considering the fact that no second optical element is involved in the concentrator system, our design method inherently has the advantages of good compactness, high efficiency, low cost, and ease for mass-production. We believe that such a concentrator is of great significance to solar cells for high conversion efficiency of light in the concentrator photovoltaic system. (C) 2019 Optical Society of America

机译：在本文中，提出了一种两步光学设计方法，用于构建一种基于菲涅耳的光伏聚光器，用于提高多结太阳能电池的光转换效率。在第一步中，我们正交地将传统的菲涅耳集中器分段并拆下水平和垂直轴周围的两个正常条纹带，并再次重新组合得到的四个象限。通过使用这种特定的菲涅耳集中器设计，由于光的偏离轴非旋转对称叠加，可以构造方形光图案。在第二步骤中，对于特定三界太阳能电池的响应波长，我们进一步执行上述菲涅耳集中器的三波长和多焦点设计，以改善太阳能电池上的光分布的均匀性。为了显示这种新颖的设计方法的有效性，设计和模拟了一种具有800倍和0.775的几何浓度比的典型设计参数的太阳能聚光器。结果，获得了高达87％的理论辐照度均匀性。此外，考虑到没有第二光学元件涉及集中器系统的事实，我们的设计方法本身具有良好的紧凑性，高效率，低成本和易于生产的优点。我们认为，这种集中器对浓缩器光伏系统中光的高转换效率的太阳能电池具有重要意义。（c）2019年光学学会

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来源
《Applied optics》 |2019年第19期|共7页
作者
Jiang Yanru; Xie Qingkun; Qu Enshi; Ren Liyong; Liang Jian; Wang Ling;
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Chinese Acad Sci Xian Inst Opt &

Precis Mech Res Dept Informat Photon Xian 710119 Shaanxi Peoples R China;

Chinese Acad Sci Xian Inst Opt &

Precis Mech Res Dept Informat Photon Xian 710119 Shaanxi Peoples R China;

Chinese Acad Sci Xian Inst Opt &

Precis Mech Res Dept Informat Photon Xian 710119 Shaanxi Peoples R China;

Chinese Acad Sci Xian Inst Opt &

Precis Mech Res Dept Informat Photon Xian 710119 Shaanxi Peoples R China;

Chinese Acad Sci Xian Inst Opt &

Precis Mech Res Dept Informat Photon Xian 710119 Shaanxi Peoples R China;

Chinese Acad Sci Xian Inst Opt &

Precis Mech Res Dept Informat Photon Xian 710119 Shaanxi Peoples R China;

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Multi-wavelength multi-focus Fresnel solar concentrator with square uniform irradiance: design and analysis

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