后排建筑外表面反射比对北向教室采光影响的数值模拟研究

Numerical Simulation Study of the Daylighting Performance of North Classrooms due to External Surface Reflectivity of Opposite Buildings

采用数值模拟的方法,从楼层、太阳高度角等方面,就后排建筑外表面反射比对北向教室照度最低值和采光均匀度的影响进行了研究.通过对数值模拟结果的分析可知,当外表面反射比由0.20增加到0.50时,照度最低值增加的百分比最大高达105%;采光均匀度增加的百分比最大可达58%.同时,随着教室所在楼层的升高或太阳高度角的变大,后排建筑外表面反射比对教室采光效果影响的程度会减小.

This paper studies the effect due to different external surface reflection factors of opposite buildings on the day lighting and illumination and uniformity of north classrooms in the aspects of floor and solar elevation by using the numeri cal simulating method. By analyzing the simulating results, the authors find that the increased rate of the illumination is up to 105%, while the uniformity is up to 58% when the reflectivity changes from 0.20 to 0.50. At the same time, when the class room floor rises or the solar elevation increases, the effect due to external surface reflectivity of opposite buildings on day lighting performance of the classrooms decreases.