分區入射的無二次光學複合式聚光鏡設計

Sub-zones TIR-Fresnel Concentrator Design without Secondary Optical Element

李曜成(Yao-Cheng Li)

指導教授 ： 劉宗平

元智大學/電機通訊學院/光電工程學系/碩士(2011年)

https://doi.org/10.6838/YZU.2011.00303

摘要

對於高聚光太陽電池，如果二次光學元件（SOE）未使用，聚光鏡將在太陽電池表面上產生熱點;否則，二次光學元件將因為菲涅爾反射而減少光學效率。在本設計中，每個齒型的全內反射面將被設計為遵守長寬比為0.5的條件而增加設計輪廓的自由度。通過不斷調整齒型的結構，可以控制光束到達不同區域的電池表面。如果光束在電池表面被安排為交叉入射的方式，來自太陽光譜的色散造成的不均勻性可明顯改善。模擬光學效率是84.7％、接受半角為 0.48°和均勻性是0.134，相當接近476倍集光倍率的菲涅爾聚光鏡。符合熱壓鑄生產條件下，光學效率仍是84.7％，接收半角為 0.6°，均勻度為 0.086。

關鍵字

聚光鏡 ； 光學設計 ； 聚光型太陽電池 ； 全反射

並列摘要

For high concentrating photovoltaic, the concentrator will make a hot-spot on the surface of solar cell if the secondary optical element (SOE) is not used; else the SOE will decrease the optical efficiency of concentrators due to Fresnel reflections. In this design, each total-internal-reflection surface of a tooth will be designed to obey a condition of the aspect ratio of 0.5 to increase the freedom of the design profile. Through continuously adjusting the structure of the teeth, the light beam arriving at different locations on the chip surface of the cell can thus be handled. If the light beam on the chip surface is arranged with a way of crossing-incidence, the non-uniformity caused by the dispersion come from the solar spectrum can evidently be improved. Simulated optical efficiency is 84.7% and the acceptance half angle is 0.48°. Furthermore, the uniformity is 0.134, which very close to the Fresnel concentrator with a concentration ratio of 476X. Through the process of hot-pressed, the optical efficiency is still 84.7%, the acceptance half-angle is 0.6?, and the uniformity is 0.086.

並列關鍵字

concentrator ； optical design ； CPV ； TIR

參考文獻

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