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建築照明節能效益評估之研究

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圖 2. 3 入射角餘弦定律  (資料來源:照明手冊)  2.2  光通量法       欲得知環境中平均照度之方法,可以 John(2003)在輻射研討會(Radiance  Workshop)中所提及: 「自白熾燈發明以來至 1906 年,為了解室內各點不同光源 照度而創造之計算方法-流明法,持續演進至今已成為設計者計算建築室內環境 照明是否滿足照度需求之演算法。」光通量法  (Lumen method)亦稱光束法或流 明法,一般應用在直接照明系統,照明評估中可用來計算空間中的平均照度值, 亦可藉由計算
表 2. 2  室指數之分級
圖 2. 5 利用係數
圖 2. 6 節能改善效益示意圖  (資料來源:ASHRAE Guide 14-2002)     我國綠基會 ESCO 亦推動辦公室之節能績效量測與驗證方法參考文件,並在 2007 年提出之照明節能改善之節能績效與驗證方法中提及:照明改善之驗證有 二種,一為提供併含安定器及耗電量燈具文件;一為需量測基準線與與燈具瓦 數,藉以建立電力消耗數據,其公式如下:
+7

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