日光感知的LED照明系统节能特性

Energy efficient characters of LED daylight lighting system

基于闭环控制原理,研制了日光感知的LED照明系统,能在日光不足时动态控制LED光源的亮度,使得室内照度保持恒定。给出了一种计算日光感知照明节能指标的方法,指出在纯日光照明下室内照度低于临界值的时间越长,则日光感知照明节能越多。选择晴朗的中秋与深秋在傍晚测量了纯日光照明下的室内照度,通过功率补偿实验确定了不同时刻的光源功率,再经拟合与积分得到中秋和深秋傍晚日光条件下节能率分别为46.3%与48.5%。日光结合自主式LED调光照明具有较为显著的节能效果。

An LED daylight lighting system,which dynamically keep indoor illuminance constant when sunlight is not enough,was developed based on closed loop control technology.Method used for calculating energy efficient characters of daylight lighting was presented.The longer duration of indoor illumination less than threshold illumination is under daylight illumination,the more energy is saved.The indoor illumination was measured in evening of mid-autumn and deep autumn respectively under sunlight lighting.The energy saving efficiency was calculated through curve fitting analysis and numerical integration to be 46.3% and 48.5% respectively at the real sun-light condition of mid-autumn and deep autumn.Daylight integrated autonomous LED dimming has remarkable energy saving characters.