研发低成本的聚光器是大规模降低太阳能热利用成本的重要途径之一。为了降低材料成本,提出注水型菲涅耳聚光器的设计新思路。注水型菲涅耳聚光器采用由薄平板玻璃组成的中空三角形棱柱,通过在中空部分注入纯净水来减少透镜材料的使用,从而降低成本。研究该聚光器的设计理论并建立相应的光学模型,采用蒙特-卡罗光线追迹方法研究不同太阳入射角度下聚光器的光学性能,并与传统菲涅耳聚光器进行对比。搭建试验样机并进行初步的聚光实验。研究结果表明,相较于传统菲涅耳聚光器,注水型菲涅耳聚光器虽然聚光效果有一定的损失,聚光效率平均损失为5.40%,但试验样机具有明显的聚光效果,光斑宽度与理论情况也较吻合,具备工程应用的可行性。

针对平板吸收体非对称复合抛物聚光器(PACPC)的结构及特性进行了研究。构建了平板吸收体复合抛物聚光器(CPC)面形结构模型,在其基础上进一步建立了PACPC结构方程,并获得解析解。采用光学设计软件TracePro对所构建的PACPC面形结构的光学特性进行了光学模拟,探究其光学特性,发现随着光线入射角的变化,吸收体表面接收到的辐射能分布不均匀。根据太阳能直散辐射理论,分别计算了PACPC在全年中的直散辐射量的采集,结果表明PACPC系统的年采光量较相同面积的平板吸收体系统得到了显著提高,平均年采光量提高了15.28%。

A novel method for preparing a luminescent solar concentrator (LSC) with fluorescent aqueous layer sandwiched between two pieces of flat glass is developed. By this method, an aqueous layer concentrator with a size of 78×78×7 (mm) is fabricated. After coupled with silicon solar cell, the concentrator shows a power conversion efficiency of 3.9%, about 30% higher than that of the same sized laminated glass concentrator employing the same dyes. Furthermore, the measured efficiency almost reaches the calculated limit of the aqueous layer LSC. This kind of aqueous layer LSC offers a potential application in the building-integrated photovoltaics.

为研制适用于太阳光直接泵浦激光器的聚能系统，在分析菲涅尔透镜聚光原理及缺陷的基础上，提出抛物面环形阵列聚光器的设计方法。完成了由抛物面环形阵列聚光器、菲涅尔透镜及复合抛物面聚光器（CPC）组成的太阳光泵浦激光器二级聚能方案，并与传统菲涅尔透镜方案进行了对比。光线追迹仿真分析表明：新型聚光器能够克服传统菲涅尔透镜的色散、小棱镜面像差及光线遮挡的缺陷，从而提高聚能效，使用抛物面环形阵列聚光器的多级聚能方案较传统菲涅尔透镜的多级聚能方案聚光比提高约18.5%，更适合于大相对孔径、高聚光比聚光场合的应用。

Presently, energy conservation and carbon dioxide emission reduction have become increasingly important because of global warming. Using solar energy, which is considered as one of the most important renewable energy sources, does not only decrease the consumption of fossil fuels, but also slows down the pace of global warming. For indoor illumination, our team has developed a technique called "Natural Light Illumination." Instead of using solar cells, our system directly guides sunlight into the interior of a structure. However, the efficiency of the light-collecting module is still low. To address this problem, we propose a new light-collecting module based on a prism array structure with high efficiency. We use optical simulation tools to design and simulate the efficiency of the module, which is found to be 57%. This value is higher than that of the original concentrator (i.e., 11%).