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首页> 外文期刊>Applied optics >Evaluation and optimization of the optical performance of low-concentrating dielectric compound parabolic concentrator using ray-tracing methods
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Evaluation and optimization of the optical performance of low-concentrating dielectric compound parabolic concentrator using ray-tracing methods

机译：利用射线追踪法评估和优化低浓度介电复合抛物面聚光器的光学性能

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摘要

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 deg and 55 deg), (0 deg and 66 deg), and (0 deg and 77 deg), respectively, are designed in order to optimize the concentrator for building facade photovoltaic applications in northern latitudes (>55 deg 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 83percent, 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 +-12percent with an average intensity of 520 W/m~(2).
机译：我们提出了使用射线跟踪方法的固定介电非对称复合抛物面聚光器（DiACPCs）的详细设计概念和光学性能评估。分别具有接受半角（0度和55度），（0度和66度）和（0度和77度）的三种DiACPC设计：DiACPC-55，DiACPC-66和DiACPC-77。旨在优化集中器，以在北纬（> 55 deg N）的建筑立面光伏应用中使用。通过截断完整的复合抛物线形聚光器轮廓来实现介电聚光器轮廓，以实现2.82的几何浓度比。光线跟踪模拟结果表明，在接受半角范围内进入设计的聚光器的所有光线都可以被收集，而不会从抛物面和孔径逃逸。发现设计的聚光器的最大光学效率为83％，随着入射角的增加而趋于降低。对于直接太阳辐照的宽入射角范围，在接收器的某些点处具有高强度峰值，发现强度以不均匀的模式分布在接收器（太阳能电池）区域。但是，对于接近极限接收角入射的辐射，峰会变得更加强烈，从而将峰移动到接收器的边缘。发现散射辐射的接收器处的能量通量分布在+ -12％范围内均匀，平均强度为520 W / m〜（2）。

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