Improvement of Efficiency of Static Prismatic Concentrator via Mathematical Analysis

• Main Authors: Shu-hua Yang, 楊淑樺
• Other Authors: Jong-Woei Whang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/22428986084899407812

碩士 === 國立臺灣科技大學 === 電子工程系 === 98 === Although a static solar concentrator does not include a sun tracking system, it has a low cost and is easy to maintain; however, its collection efficiency is lower than that of a dynamic concentrator. In this paper, we focus on the parallel light incident on a single right-angle prism in order to obtain the mathematic function of the input-output relationship which applicable to any cascade-structured model and single right-angle prism. We then propose a static prismatic solar concentrator whose design is based on cascading right-angle prisms whose axes are in different directions. We use a mathematic model to analyze the influence of the efficiency factor on the relationship between cascading right-angle prisms and the path of the sun. On the basis of our results, we conclude that the length of prism satisfies Li+1> Li with sunlight rotation in the y-z direction and the optimal number of cascading prisms is i = 3; using this result, an improved model whose total collection efficiency exceeds that of the original prismatic concentrator by 44.796% is realized.