新式槽型自由曲面於加熱式太陽能集光器之設計

New Solar Thermal Concentrator Design Based on Free-form Trough Reflector

曾文麗(Wen-Li Tseng)

指導教授 ： 蔡忠佑

國立虎尾科技大學/工程學院/機械與電腦輔助工程系碩士班/碩士(2017年)

摘要

本研究提出一種新設計的加熱式太陽能集光系統，其中主要是由槽型自由曲面(FFT)、反射面(Refelector)和圓柱形的加熱管接受器所組成。利用自由曲面建立方法(FFSC)來設計反射面的外形，使得每個入射光線被引導到使用者所指定的點在加熱管表面上。在集光系統內的光線路徑，乃是使用歪斜光線追蹤方法來進行光學的建模。而本研究所提出的設計方法，可大幅改善集光系統中加熱管表面上的輻射照度之均勻性，其設計的結果藉由ZEMAX光學分析軟體與SolidWorks Flow Simulation熱流分析軟體進行模擬分析，最後再以實驗結果加以比較驗證。其結果顯示，本研究設計的新式槽型自由曲面(FFT)集光器與傳統的圓柱(CT)槽型集光器與標準拋物線(SPT)槽型集光器相比較，其自由曲面的均勻性與加熱效率有明顯的改善。

關鍵字

太陽能集光器 ； 槽型集光器 ； 自由曲面

並列摘要

A solar thermal concentrator system is proposed comprising a free-form-trough (FFT) reflector and a cylindrical heat-pipe receiver. The profile of the reflector is designed using a free-form surface creation (FFSC) method such that each incident ray is directed to a certain user-specified point on the heat-pipe surface. The light ray paths within the concentrator system are analyzed using a skew-ray tracing approach. A method is then proposed for optimizing the geometry of the concentrator system in such a way as to achieve a uniform irradiance distribution on the heat-pipe surface. The validity of the proposed optimization approach is demonstrated by means of ZEMAX / SolidWorks-Flow simulations. The results show that the proposed FFT concentrator yields a significant improvement in both the irradiance uniformity and the heating efficiency compared to conventional cylindrical-trough and parabolic-trough concentrators.

並列關鍵字

Solar concentrator ； Trough concentrator ； Free-form

參考文獻

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