近年來由於對照明品質的要求、地球環境議題的重視以及節節高升的能源成本等因素，使得晝光利用再度被重視。許多廠商宣稱其晝光利用系統有較高的節能效益，經由本研究以全尺寸驗證比對發現晝光調光機制還有改善的空間。此外本研究以平均氣象年帶入DAILux模擬並透過實測值修正數據來探討本辦公室全年晝光調光的節能效益。並比對T5螢光燈與冷陰極管兩種不同照明光源的調光節能效益。

本研究內容摘要如下：

一、 以北面單邊採光的整體空間來看，兩迴路T5螢光燈使用晝光調光全年約可達成整體節能率37%，此數值介於 DIALux未經修正模擬值節能率31.8%以及最大調光節能率理論值39.5%之間。

二、 單迴路CCFL晝光調光之總體用電量較T5螢光燈三迴路全點亮多出2.4%用電量，但相較於CCFL三迴路全點亮則有16.4%節能率。另外CCFL單迴路晝光調光耗能較T5燈光燈單迴路晝光調光耗能約多出27.4%。

三、 建議使用有獨立電源控制的晝光感知器以達成節能最佳化。在鄰近開口部的第一迴路使用此控制方式可使整體節能率提升約13%，如果與第二迴路一併使用此控制方式可使整體節能率提升約20%。

建議在晝光充足的區域以手動開關方式控制照明迴路可達成與自動控制相近之節能效果且能減少回收年限，而在晝光覺微不足之處採用晝光調光方能發揮其維持穩定工作面照度的功能。

Due to lighting quality requirements, emphasis on global environment issues and rising of energy cost, makes daylighting utilization again being taken seriously by in recent years. Through this study, compared with full-size verification daylight dimming system that there is room for improvement while many vendors claim their daylight use system has a higher energy efficiency. In addition, this study simulated an average meteorological year into DAILux and amended the results through measured data in order to calculate the annual daylight dimming energy efficiency of this office. And compare the dimming lighting energy efficiency of Cold Cathode Fluorescent (CCFL)and T5 Fluorescent Lamp(T5).

The summary is as follows:

T5 fluorescent lamps with two-loop daylight dimming can be reached about the overall annual rate of 37% energy saving. This numerical simulation value between the value of dialux simulation saving rate 31.8% and the maximum theoretical value of energy saving rate 39.5%.

One-loop daylight dimming CCFL power consumption than the T5 fluorescent lamps three loops without daylight dimming of 2.4% more power. However, compared with three-loop CCFL without daylight dimming the energy-saving rate is 16.4%. Compared with one-loop daylight dimming T5 fluorescent lamps the energy consumption is 27.4% more power.

Recommend the use of a separate power control of daylight sensors to achieve optimal energy. The daylight dimming loop near windows can use this control to enhance the overall rate of about 13% energy saving. Daylight dimming loop near windows and the middle can both use this control to enhance the overall rate of about 20% energy saving.

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