Evaluation and optimization of the optical performance of low-concentrating dielectric compound parabolic concentrator using ray-tracing methods.
Evaluation and optimization of the optical performance of low-concentrating dielectric compound parabolic concentrator using ray-tracing methods.
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DOI：
10.1364/ao.50.003303
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发表时间：
2011-07
期刊：
影响因子：
1.9
通讯作者：
N. Sarmah;B. Richards;T. Mallick
中科院分区：
文献类型：
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作者：
N. Sarmah;B. Richards;T. Mallick
我们提出了一个详细的设计概念和光学性能评估的固定介质非对称复合抛物面聚光器（DiACPC）使用光线追迹的方法。设计了三种DiACPC设计，DiACPC-55、DiACPC-66和DiACPC-77，分别具有接受半角（0°和55°）、（0°和66°）和（0°和77°），以优化用于北方纬度（>55 °N）的建筑立面光伏应用的聚光器。介电聚光器的轮廓已经实现了通过截断完整的复合抛物面聚光器的轮廓，以实现2.82的几何浓度比。光线追迹模拟结果表明，所有进入聚光器的光线在接收半角范围内都可以被收集，而不会从抛物面和孔径处逃逸。设计的聚光器的最大光学效率为83%，随着入射角的增加而下降。的强度被发现分布在接收器（太阳能电池）区域中的一个不均匀的图案为一个宽范围的入射角的直接太阳辐射与高强度峰值在某些点的接收器。然而，峰值对于接近极端接受角的照射入射变得更强，将峰值移动到接收器的边缘。散射辐射能流在接收器处的分布均匀度在±12%以内，平均强度为520 W/m²。
We present a detailed design concept and optical performance evaluation of stationary dielectric asymmetric compound parabolic concentrators (DiACPCs) using ray-tracing methods. Three DiACPC designs, DiACPC-55, DiACPC-66, and DiACPC-77, of acceptance half-angles (0° and 55°), (0° and 66°), and (0° and 77°), respectively, are designed in order to optimize the concentrator for building façade photovoltaic applications in northern latitudes (>55 °N). The dielectric concentrator profiles have been realized via truncation of the complete compound parabolic concentrator profiles to achieve a geometric concentration ratio of 2.82. Ray-tracing simulation results show that all rays entering the designed concentrators within the acceptance half-angle range can be collected without escaping from the parabolic sides and aperture. The maximum optical efficiency of the designed concentrators is found to be 83%, which tends to decrease with the increase in incidence angle. The intensity is found to be distributed at the receiver (solar cell) area in an inhomogeneous pattern for a wide range of incident angles of direct solar irradiance with high-intensity peaks at certain points of the receiver. However, peaks become more intense for the irradiation incident close to the extreme acceptance angles, shifting the peaks to the edge of the receiver. Energy flux distribution at the receiver for diffuse radiation is found to be homogeneous within ±12% with an average intensity of 520 W/m².