建筑遮阳对建筑室内照明能耗的影响分析

Influence of Building Shading on Building Indoor Lighting Energy Consumption

建筑遮阳可以降低室内局部区域过高的照度水平,但会降低室内整体照度水平,在室外照度不高的情况下,遮阳还会影响室内照度,增加照明能耗。针对建筑遮阳对建筑室内照明能耗的影响问题,选取具有代表性的建筑南向水平遮阳进行研究,利用光环境模拟软件Ecotect和Radiance对五个气候区的典型城市进行模拟,分析了不同气候区的不同窗墙比、不同窗户类型、不同遮阳板长度对建筑室内照明能耗的影响,得到建筑遮阳对室内光环境的影响规律。

In this paper, the shade to the south level of a representative office building is studed. In accordance with the building model information by Ecotect, the indoor light environment simulation model is established, selecting a model in a separate standard room with the size of 10 m x 10 m x3 m, taking the distance O. 8 m from the ground for the lighting analysis, office building indoor surface reflectivity were set to ceiling O. 75, wall O. 60, ground O. 30, the visible light transmission ratio of the window were set according to the type of windows. In order to simulate the illumination of the indoor room in a reasonable manner, a calculation grid is set by O. 1 m. For the general office area, the indoor illumination of 300 lux is to meet the requirements, if the natural light intensity is less than 300 lux the indoor lighting needs to be open. This paper mainly studies the influence of building shade on indoor light environment. The research focus on simulating and analyzing the influence of different shading schemes on indoor illumination. Therefore, we mainly analyze the range of indoor illumination less than 300 lux to determine the range and time of artificial lighting out of the lighting energy consumption changes. The time of the selection of the indoor illumination is simulated according to the different window and wall ratio, different window types and different sun visors, and the simulation results are analyzed at 12 ： O0 noon on June 21 （ summer solstice day）. The window width ratio is O. 25, O. 35, O. 45, the visible light transmittance of the window is O. 48, O. 62, O. 72, and the length of the sun visor is 0 m, O. 1 m, O. 2 m, O. 3 m, O. 4 m, O. 5 m, O. 6 m, O. 7 m, O. 8 m, O. 9 m, 1 m. According to the simulation results, the distance between the area and the window is less than 300 lux in different cases. This distance is defined as the indoor natural light distance. The typical urban office buildings in Harbin, Beijing, Shanghai, Guangzhou and Kunming South are expounded. The effects of shading on the indoor light environment are simulated by the combination of different window types, different window types and different shade panels, and the simulation results were analyzedand compared by using the environmental simulation software Ecotect and Radiance. The results show that the indoor natural light distance with different visible light transmittance tends to be gentle with the increase of the length of the sun visor. With the increase of the visible light transmittance, the change trend of the natural light distance gradually becomes gentle. When the transmittance is O. 72, the indoor natural light distance is maintained at lore. The indoor natural light distance in different climatic zones increases with the increase of the window - to - wall ratio and the visible light transmittance. The increase in the length of the sunshade plate to a certain extent will reduce the indoor natural light distance, increase the demanded scope of indoor lighting and lighting energy consumption.