新型遮阳采光系统的结构优化研究

Structural Optimization of a New Light Shelf System

为提高各季节室内采光照度均匀性,本文提出一种新型遮阳采光系统,包括遮阳采光板和窗玻璃。本研究利用TracePro7.0软件模拟分析了遮阳采光板的长度、角度以及天窗玻璃的形状在不同季节对房间内部照度水平及照度分布的影响,进一步优化了遮阳采光板在北京地区使用时的动态调节方案。研究表明板长为600 mm的遮阳采光板在各个季节营造的室内照度和均匀度最好。为提高房间进深的采光效果,可将遮阳采光板的室外侧板角在夏冬两季倾斜10°,春秋两季倾斜15°。模拟结果同时显示,采用倒梯形的天窗玻璃可以进一步提高房间内部照度水平。本研究为遮阳采光系统的应用提供了光路设计的理论依据,其动态调节方案对天然光的高效利用有实际意义。

In order to improve the indoor daylighting uniformity in all seasons,this paper proposes a new type of light shelf system,which includes a light shelf and glazing panel.TracePro7.0 is adopted to optimize the length and tilt angle of the light shelf and the shape of clerestory windew for better illuminance level and uniformity.A south-facing room is used for simulation and the results show that the illuminance and uniformity are acceptable in all seasons with a 600-mm-long light shelf.In order to improve the daylighting performance,10°is suggested for summer and winter seasons,while 15°is considered acceptable in spring and autumn.The simulation results also show that inverted trapezoidal clerestory window could be used in Beijing in summer and winter seasons for further increasing the indoor illumination level.This study provides a theoretical basis for the optical path design of light shelf system,and its dynamic adjustment is of practical meaning for the efficient use of daylight.