太陽集光器結合人工光源之室內照明應用

Application of Hybrid Solar Light Collectors and Artificial Light Sources on Interior Lighting

以太陽集光器結合人工光源之室內照明方式，非常適合高日照率的台灣，但國內鮮少有相關研究。為掌握其應用考量，本研究於一1.33 坪實驗室暗房之屋頂架設一組追日型透鏡式太陽光集光器，使其以二組20 公尺光纖燈具照射暗房。於二階段的實驗過程中，暗房內搭配二種人工光源（螢光燈及PAR 燈），以及自動化控制軟、硬體，組成維持室內桌面600 lux 照度之自動化室內照明節能應用系統。經一年餘之資料蒐集及應用觀察，發現其節能效率以夏季最高，秋季次之，冬季較差。七月份的節能效率最高，可達44%；縱使是冬季，仍有高達約20%之效率。平均每日最高節能約2422W，一個月可以節省248 元。除此，可知即使光纖燈具的效率會受到天候左右，其節能效率從季節上來比較是可排除天候因素的影響。

Fiber optic solar lighting combined with artificial lighting for interior illumination is adequate to Taiwan where sun exposure is high enough. However, it is an emerging issue up to date in Taiwan. To probe into such an issue, a set of solar light collector is set up on the rooftop of a 4.3 ㎡ darkroom where two sets of fiber optic luminaries project sunshine transported via two 20m fiber optic cables. In the two stage experiment, two types of supplemental light sources, fluorescent tubes and parabolic tungsten light bulbs, together with computer software and light control hardware, form an automated hybrid energy conversing lighting system that constantly provide an average of 600 lux illumination for the darkroom. Through one year data collection and observation, this study found that energy efficacy of the lighting system decreases in the order of summer, fall and winter. The highest effect reaches 44% in July; still, it comes to 20% in winter. In the sunny July, the fiber optic solar lighting conserves up to 2422W a day; this helps save around 248 NT dollars per month. Based on holistic research data, it can be inferred that energy efficacy of such a hybrid lighting system may disregard weather factors even though daily energy efficacy sways according to weather change.