Improvement of Efficiency of Static Prismatic Concentrator via Mathematical Analysis
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 si...
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| Format: | Others |
| Language: | zh-TW |
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2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/22428986084899407812 |
| Summary: | 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.
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