连续布置光井式单元屋顶天然采光系统的量化研究

Quantitative Research of Roof Light System Densely Arranged by Light Wells

屋顶采光是体育馆、展览馆、交通建筑等大空间建筑采光的优选方式。在屋顶上开设大面积的采光口是高效的采光方法,但太阳位置的不断变化使室内光环境难于稳定、照度分布难以均匀。本研究提出的连续布置光井式采光单元屋顶采光系统具有紧密排布的狭长腔体,天然光在其中多次反射后照明室内,这种机理有利于营造稳定、均匀的室内光环境。本文量化分析了采光单元光井系数、截面尺寸、表面反射率、朝向、分布密度等对于采光效果的影响,该研究结果可作为大空间建筑屋顶采光设计的参考。

Roof daylighting is the first choice of large spaces such as stadium, exhibition hall and transport hub. Large daylight opening on the roof is a high efficient method, but the interior light environment is difficult to be steady and the uniformity is low, as the position of the sun always changes. The roof lighting system proposed in this study includes closely arranged narrow cavities, which diffused daylight in the process of daylight transfer, which helps to create stable and uniform indoor light environment. This article quantitatively analysis the impact of the well size, Well Index （WI）, surface reflectivity, orientation and distribution density. Finally, this conclusion could be used as a reference for large space roof lighting design.