23 November 2009 Analysis of daylight performance of solar light pipes influenced by size and shape of sunlight captures
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Experimental investigations on three different sunlight captures with diameter 150mm, 212mm, 300mm were carried out under different conditions such as sunny conditions, cloudy conditions and overcast conditions and the two different size solar light pipes with diameter 360mm and 160mm under sunny conditions. The illuminance in the middle of the sunlight capture have relationship with its size, but not linear. To improve the efficiency of the solar light pipes, the structure and the performance of the sunlight capture must be enhanced. For example, University of Science and Technology Beijing Gymnasium, Beijing 2008 Olympic events of Judo and Taekwondo, 148 solar light pipes were installed with the diameter 530mm for each light pipe. Two sunlight captures with different shape were installed and tested. From the measuring results of the illuminance on the work plane of the gymnasium, the improvement sunlight captures have better effects with the size of augmenting and the machining of the internal surface at the same time, so that the refraction increased and the efficiency of solar light pipes improved. The better effects of supplementary lighting for the gymnasium have been achieved.
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Yanpeng Wu, Yanpeng Wu, Rendong Jin, Rendong Jin, Wenming Zhang, Wenming Zhang, Li Liu, Li Liu, } "Analysis of daylight performance of solar light pipes influenced by size and shape of sunlight captures", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75081C (23 November 2009); doi: 10.1117/12.838140; https://doi.org/10.1117/12.838140

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