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研究生： 林哲玄
Jhe-Syuan Lin
論文名稱： 薄型化光展量疊加太陽能集光器
Design of a Thin Etendue-Cascading Solar Concentrator
指導教授： 梁肇文
Chao-Wen Liang
口試委員:
學位類別： 碩士
Master
系所名稱： 理學院 - 光電科學與工程學系
Department of Optics and Photonics
畢業學年度： 100
語文別： 中文
論文頁數： 80
中文關鍵詞： 光展量 、太陽能集光器
外文關鍵詞： Solar Concentrator, Etendue
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    • 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.

    第一章 緒論 1 1 - 1 研究背景 1 1 - 2 研究動機與目的 1 1 - 3 論文架構 2 第二章 非成像光學原理 3 2 - 1 文獻回顧 3 2 - 2 立體角(Solid angle)與光學不變量(Etendue) 4 2-2-1 立體角與投影立體角 4 2-2-2 光學不變量(Etendue) 7 2 - 3 輻射度學 8 2-3-3 平方反比定律與Cosine 第一定律 10 第三章太陽能電池與集光參數定義 12 3 - 1 太陽光譜 12 3 - 2 太陽能電池簡介 13 3 - 3 太陽能集光器參數定義 15 第四章 太陽能集光器系統 17 4 - 1 太陽能集光器分類 17 4 - 2 低倍率集光比太陽能集光器 18 4 - 3 中倍率集光比太陽能集光器 23 4 - 4 高倍率集光比太陽能集光器 28 4-4-1 折射式太陽能集光器 29 4-4-2 反射式太陽能集光器 35 4 - 5 全反射式太陽能集光器 40 第五章 太陽能集光器設計與模擬 43 5 - 1 簡介 43 5 - 2 The concept of Etendue-Cascading 43 5 - 3 放大率優化限制條件 47 5 - 4 初階設計 48 5 - 5 Etendue-Cascading 系統改良 50 5 - 6 中心位置處增加透鏡設計 53 5 - 7 集光器製程考量 57 5 - 8 Reflective Coating versus Efficiency 61 第六章 結論與未來展望 64 參考文獻 67

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