利用楔形稜鏡與繞射光柵設計非光線追跡薄型太陽能集光器

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姓名

雲大賢(Tanant Waritanant) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

利用楔形稜鏡與繞射光柵設計非光線追跡薄型太陽能集光器
(Study of Non-Tracking Thin Profile Solar Concentrators Designed Using Wedge Prisms and Diffractive Gratings)

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摘要(中)

本論文探討利用非光線追跡設計太陽能電池集光器，本設計包含楔形棱鏡、繞射光柵、與體積小等。利用模擬演算法證明此實驗結果與給出此條件與參考數據。
模擬發現此設計太陽能電池集光器，波長可接收範圍在500 nm以上。太陽能集光器的長度與厚度的比例可以超過7，輸入單位面積強度與輸出單位面積強度比值超過3.7，二維的角度容忍度可達到 ±53 °和±13 °。

摘要(英)

This thesis explores non-tracking thin profile solar concentrator designs that comprised of a wedge prism and diffractive gratings and their geometrical limitations. Full explanation of the simulation algorithm used to simulate the results in this thesis is also given.
The simulation result of the last design shows that a concentrated broad solar spectrum of up to 500 nm can be achieved by utilizing two diffractive gratings. One blazed transmission grating located on the top and another blazed reflection grating placed below bottom surfaces of the wedge prism. The gratings diffract the incident light guiding it into the wedge prism. The guided light is then projected onto the solar module located at the end face of the prism. With this coupling mechanism, the concentrator’s length-to-thickness ratio can exceed 7, the maximum concentration ratio exceeds 3.7, and angular tolerance can reach ±53° and ±9° in the two planes of incidence. In addition, the polarization dependence, as a property of the one-dimensional diffractive grating, is suppressed.

關鍵字(中)

★ 踏陽能集光器
★ 光柵
★ 楔形稜鏡

關鍵字(英)

★ Wedge prism
★ Grating
★ Solar concentrator

論文目次

Table of contents
中文摘要.................................................................................................................................................... IV
Abstract V
Table of contents VI
List of figures VIII
List of tables X
Chapter 1 Introduction - 1 -
1.1 Solar concentrators for Photovoltaic application - 1 -
1.2 Fundamentals - 4 -
1.2.1 Wedge Prisms - 4 -
1.2.2 Blazed gratings - 5 -
1.3 Geometrical limitations - 7 -
1.3.1 Simple wedge design - 8 -
1.3.2 Wedge prism with sawtooth-profile mirror - 8 -
Chapter 2 Simulation tools - 10 -
2.1 Rigorous coupled-wave analysis (RCWA) of one-dimensional grating - 10 -
2.2 Simple Ray tracing - 14 -
2.3 Details of the simulation process - 14 -
Chapter 3 Designs & Results - 16 -
3.1 Geometrical limitation cases - 16 -
3.1.1 Simple wedge - 16 -
3.1.2 Wedge with sawtooth profile mirror - 18 -
3.2 Initial design concept - 19 -
3.3 Single wedge prism design with reflection grating - 20 -
3.3.1 Acceptance angle - 20 -
3.3.2 Collection efficiency spectrum - 21 -
3.3.3 Change in collection efficiency due to the change in design parameters - 22 -
3.4 Double wedge prism design with reflection grating - 30 -
3.4.1 Acceptance angle - 30 -
3.4.2 Collection efficiency spectrum - 31 -
3.4.3 Change in collection efficiency due to the change in design parameters - 32 -
3.5 Single wedge prism design with reflection and transmission grating - 42 -
3.5.1 Acceptance angles - 42 -
3.5.2 Governing equations - 43 -
3.5.3 Simulation results - 44 -
3.5.4 Output characteristic - 48 -
Chapter 4 Discussion - 52 -
4.1 Experimental verification of the simulation - 52 -
4.2 Comparison of collection efficiencies and concentration ratios - 54 -
4.3 Output profile & further concentration ratio enhancing possibility - 54 -
Chapter 5 Conclusion - 58 -
References - 59 -
Appendix - 61 -

參考文獻

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指導教授

鍾德元(Te-yuan chung)

審核日期

2011-7-27

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