薄型化光展量疊加太陽能集光器;Design of a Thin Etendue-Cascading Solar Concentrator

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/54203

Title:	薄型化光展量疊加太陽能集光器;Design of a Thin Etendue-Cascading Solar Concentrator
Authors:	林哲玄;Lin,Jhe-Syuan
Contributors:	光電科學研究所
Keywords:	光展量;太陽能集光器;Solar Concentrator;Etendue
Date:	2012-07-24
Issue Date:	2012-09-11 18:39:47 (UTC+8)
Publisher:	國立中央大學
Abstract:	Ⅲ-Ⅴ族太陽能電池常需要高倍率聚光鏡組，來降低其成本與提升轉換效率，而良好的太陽能集光器系統除了高倍率集光比之外效率也是很重要的因素考量之一。本論文討論一具有高聚光倍率、薄型化和光展量疊加特點的太陽能集光器設計，此設計可以使太陽能集光器系統的成本大大降低，不僅僅簡化了系統alignment上的難度，也對整個系統的體積降低許多。本設計描述一種結合折射式與反射式的太陽能集光器設計，利用了折射式的透鏡聚焦方法讓光線可以以最少的損耗大量進入系統中，再利用反射式離軸傳遞光線與Etendue光學概念，將各個透鏡進入的光線做光展量的疊加與離軸的傳遞，最後再進入到太陽能電池上。此設計另外有個特點就是薄型化，以目前學術上薄型化設計厚薄比約只到0.25的比值，而利用透鏡聚焦的設計更是遠大於1以上，使得整體體積相當龐大，而本設計的厚薄比約可達到0.19，而整體最高效率可達到66.68%，可接收角度為±0.9度。Ⅲ-Ⅴmulti-junction solar cells often need solar concentrators with high concentration ratio to decrease the cost and to increase the transforming efficiency. Besides high concentration ratio, a solar concentrator should also have high efficiency. This Master thesis discusses about a solar concentrator design which has key advantages of having high concentration ratio, thin design and Etendue-cascading features. This design can reduce cost significantly, simplify alignment effort and decrease the overall system volume. This Master thesis describes a novel design that combines the concept of both refractive and reflective concentrator type. The light is first focused into our system with minimal loss through high-NA lenses, and then off-axis-relayed to the solar cell through the reflective surfaces. The Etendue cascading feature of this design cascades light collected by all refractive lenses, and focuses it onto the solar cell. Another key advantage of this design is its thin feature. The smallest aspect ratio reported so far is only 0.25, and that of refractive design is much larger than 1, which makes the overall system large. In contrast, our design can result in an aspect ratio of 0.19, efficiency as high as 66.68%, and acceptance angle of ±0.9 degree.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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