Huang Jia-hong, Fei Wun-Ciang, Hsu Wei-Chi, Tsai Jui-che
Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan.
Appl Opt. 2010 Aug 10;49(23):4472-8. doi: 10.1364/AO.49.004472.
We present a novel idea to construct a solar concentrator with a circular prism array. FRED ray tracing software is used to evaluate our proposed structure in which the incident light rays are deflected by total internal reflection and the optical energy is concentrated and collected at the center. The light rays to be collected travel within the disk once they enter the module, saving the space that is reserved for ray propagation in other concentrators. Simulations for both single-wavelength and broadband light are performed. Our device can be used alone or serve as a secondary concentrator when combined with another solar-energy focusing module. For the proposed concentrator, an optical efficiency of 90% (single wavelength, 0.87 microm) is achieved under normal incidence and with antireflection coating, and a high geometric concentration ratio of 93 is reached. When combined with a Fresnel lens, which is used as a primary concentrator, the overall efficiency and concentration ratio can reach 92% (single wavelength, 0.87 microm) and 837, respectively.
我们提出了一种用圆形棱镜阵列构建太阳能聚光器的新颖想法。使用FRED光线追踪软件来评估我们提出的结构，在该结构中，入射光线通过全内反射发生偏转，光能在中心处被聚集和收集。待收集的光线一旦进入模块就在圆盘内传播，节省了其他聚光器中用于光线传播的空间。进行了单波长和宽带光的模拟。我们的装置可以单独使用，或者与另一个太阳能聚焦模块组合时用作二次聚光器。对于所提出的聚光器，在垂直入射且有抗反射涂层的情况下，实现了90%（单波长，0.87微米）的光学效率，并且达到了93的高几何聚光比。当与用作一次聚光器的菲涅耳透镜组合时，整体效率和聚光比分别可以达到92%（单波长，0.87微米）和837。
