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Design method toward creating a three-dimensional asymmetric compound parabolic concentrator
Journal of Photonics for Energy ( IF 1.7 ) Pub Date : 2020-09-02 , DOI: 10.1117/1.jpe.10.037001
Jonathan Ferry 1 , Roland Winston 1
Affiliation  

Abstract. Ideal three-dimensional concentration has been sought for decades in the solar and optical worlds. Nonimaging optics has been able to achieve this thermodynamic maximum concentration limit with certain symmetrical designs, but three-dimensional concentration in which acceptance angles are not symmetric has been a challenge for researchers. Our study outlines a new design approach that hopes to move toward the development of an ideal 3D asymmetric concentrator based on the current asymmetric compound parabolic concentrator (ACPC) design principles. A geometric scheme to revolve a variable ACPC curve about a central axis is presented. The 3D ACPC is compared with a standard compound parabolic concentrator (CPC) in a tilted and angular truncated case. Each design was characterized for performance by examining the angular acceptance/illumination region in angular direction cosine space. Ideal performance was demonstrated for the 3D ACPC design for an off axis circular Lambertian acceptance region in direction cosine plots, whereas the CPC designs failed to maintain a circular Lambertian distribution. High-aperture tilt angles demonstrated an interesting “flaring” of the aperture, which caused a decline in ideal performance. Despite design deformations at high-aperture angles, the 3D ACPC design method presented here is a step toward ideal 3D asymmetric concentration.

中文翻译:

一种三维非对称复合抛物面聚光器的设计方法

摘要。几十年来,太阳能和光学领域一直在寻求理想的三维聚光。非成像光学器件已经能够通过某些对称设计实现这种热力学最大浓度限制,但接受角不对称的三维浓度对研究人员来说是一个挑战。我们的研究概述了一种新的设计方法,希望能够基于当前的非对称复合抛物面聚光器 (ACPC) 设计原则开发理想的 3D 非对称聚光器。提出了绕中心轴旋转可变 ACPC 曲线的几何方案。3D ACPC 与标准复合抛物线聚光器 (CPC) 在倾斜和有角度的截断情况下进行比较。每个设计都通过检查角度方向余弦空间中的角度接受/照明区域来表征性能。对于方向余弦图中的离轴圆形朗伯接受区,3D ACPC 设计展示了理想的性能,而 CPC 设计未能保持圆形朗伯分布。大光圈倾斜角表现出有趣的光圈“扩口”,导致理想性能下降。尽管在高孔径角设计变形,这里介绍的 3D ACPC 设计方法是朝着理想的 3D 非对称集中迈出的一步。而 CPC 设计未能保持圆形朗伯分布。大光圈倾斜角表现出有趣的光圈“扩口”,导致理想性能下降。尽管在高孔径角设计变形,这里介绍的 3D ACPC 设计方法是朝着理想的 3D 非对称集中迈出的一步。而 CPC 设计未能保持圆形朗伯分布。大光圈倾斜角表现出有趣的光圈“扩口”,导致理想性能下降。尽管在高孔径角设计变形,这里介绍的 3D ACPC 设计方法是朝着理想的 3D 非对称集中迈出的一步。
更新日期:2020-09-02
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