Optical characterisation of 3-D static solar concentrator
Optical characterisation of 3-D static solar concentrator
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DOI：
10.1016/j.enconman.2012.05.028
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发表时间：
2012-12
期刊：
影响因子：
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通讯作者：
N. Sellami;T. Mallick;D. McNeil
中科院分区：
文献类型：
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作者：
N. Sellami;T. Mallick;D. McNeil
本研究的重点是开发一种紧凑，静态的太阳能集中器，同时能够收集最大的太阳能。一种新的几何形状的3-D静态集中器已被设计和铸造的平方椭圆双曲面（SEH）集成在玻璃窗或外墙光伏应用。4× SEH针对入射光线的不同入射角进行了光学优化。通过研究其不同的无量纲参数，如椭圆入口的长轴对短轴和出口孔的高度对侧，得到优化的SEH。评估光学效率和接收角的最佳组合，结果证实，由介电材料制成的4× SEH，在全内反射下工作，对于等于120°（−60°，+60°）的接收角，具有40%的恒定光学效率。这使得它能够全天从直射光和漫射光中捕获太阳光线，使其非常适合在北方欧洲国家使用。对于不同尺寸的SEH，可获得70%的较高光学效率;然而，接收角仅为50°。优化的SEH集中器已被制造和测试，实验结果表明与模拟结果，从而验证了光学模型的协议。
The focus of this research is to develop a solar concentrator which is compact, static and, at the same time, able to collect maximum solar energy. A novel geometry of a 3-D static concentrator has been designed and coined the Square Elliptical Hyperboloid (SEH) to be integrated in glazing windows or facades for photovoltaic application. The 4× SEH is optically optimised for different incident angles of the incoming light rays. The optimised SEH is obtained by investigating its different non-dimensional parameters such as major axis over minor axis of the elliptical entry and the height over side of the exit aperture. Evaluating the best combination of the optical efficiency and the acceptance angle, results confirm that the 4× SEH built from dielectric material, working with total internal reflection, is found to have a constant optical efficiency of 40% for an acceptance angle equal to 120° (−60°,+60°). This enables capture of the sun rays all day long from both direct beam light and diffuse light making it highly suitable for use in northern European countries. A higher optical efficiency of 70% is obtained for different dimensions of the SEH; however, the acceptance angle is only 50°. The optimised SEH concentrator has been manufactured and tested; the experimental results show an agreement with the simulation results thus validating the optical model.