- 學位論文
追日聚光式太陽能光纖照明系統之研製
Development of a solar-tracking concentrated lighting system via optical fibers for illumination
摘要
隨著人們對永續發展的綠建築理念的瞭解與接受，越來越多的人開始關心居家和工作場所裡的能源使用效率。一種名為追日聚光式光纖照明系統，不需窗戶既能將聚光器高度聚集的太陽光(在過濾紫外線與紅外線後)經由光纖傳輸到室內，可持久性增強室內照明強度與光線品質方式，達成降低使用照明電力，可滿足上述節能減碳的需求。本研究目的旨要以實驗方法對追日聚光式光纖照明系統特性能進行有系統的研究探討。研究第一階段是以實作方式研製一追日聚光式光纖照明雛型系統，並進行運作可能性研究；第二階段建立實驗測試系統，以實測方式紀錄並探討分析一天室內動態自然光照明強度分布特性。此外並探討追日系統機構靈敏度及不同天候條件等，對照明品質性能的影響，以期未來發展高性能自然光追蹤照明系統的參考。 本系統經實驗量測後的結果如下(1)追日系統精度偏差為0至28度，當追日系統偏離太陽10度以上時，陽光將無法經聚光器傳遞至系統內;(2)全系統可見光傳導效率約為0.125%至0.33%；(3)且室內照明的均勻度，與室內總照明量成一線性關係。本研究已開發出一套可實際運作的追日聚光式光纖照明系統，初期性能雖不盡理想，未來如能改進聚光器製造方式及光纖選用等等，即可提高系統效率達成商品化的市場門檻。
並列摘要
With the increasing awareness of sustainable and green building, more and more people are concerned with the efficiency of energy use at home and at work. A solar-tracking concentrated lighting system via optical fibers for illumination can focus highly concentrated sunlight into a fiber optic bundle to provide sunlight in rooms without windows. The IR and UV wavelengths are stripped out before the visible light is sent into the building. Due to the greatly energy saving by producing increased interior light levels for a longer duration than normally possible, it can fit to the above need and have widen been used in the indoor illumination gradually. In this study, an experimentally investigation is conducted to explore the dynamic illuminative performance of the solar-tracking concentrated lighting system via optical fibers. In the first stage of this research, a prototype of fiber optic lighting system with a solar-tracking dish concentrator is tried to develop by implementation. In the second stage, a laboratory with different experimental test apparatus is set up and the basic lighting intensity distribution of fiber optic illuminating system will be examined. In addition, the effects of various design parameters, e.g., the material of optic fiber, illuminated lamp, the sensitivity of solar tracking system and skylight condition, are also analyzed. The results of this study may be used as a reference of making an advanced high-performance solar lighting device in the future. The research results show that (1) the amount of deviation of this solar-tracking system was found to be 0~28° from the accurate sun path for the whole year. It was also found that when the deviation is over 10°, the sunlight may not be concentrated pass through into the optical fiber bundles for illumination. (2)the visible-light transitivity of the whole system is obtained to be about 0.125~0.33%; and (3) the uniformity of indoor lighting has a linear relationship with the total amount of interior lighting of house. It is expected that the model presented here would be beneficial to everyone involved in the design and performance evaluation of solar lighting with fibre optic bundles in building applications.