竖直面上散射辐射的影响因素研究
Study on influencing factors of diffuse solar radiation on vertical surface
摘要：
建筑立面上的太阳辐射是影响建筑能耗的主要气象因素之一。通过建立辐射观测站，积累实测数据，对竖直面上散射辐射的影响因素进行了分析研究。得到了竖直面上散射辐射与晴空指数(Kt)、直射辐射透过比(Kn)以及直射辐射与竖直面间夹角(φ)之间的关系。研究表明：随Kt，Kn，φ的增大，竖直面上的散射辐射均呈现出先增大再减小的变化趋势；但竖直面上的散射辐射与水平面散射辐射的比值K与Kt，Kn呈正比关系，与φ呈反比关系。
Abstract：
Solar radiation on the building facade is one of the main meteorological factors that affects the building energy consumption. Analyses the main factors which affects the diffuse solar radiation on vertical surface using the real data observed at the radiation station. Finds out the correlation among diffuse solar radiation on vertical surface, clearness index Kt, direct radiation transmittance Kn and angle between the direct normal solar radiation and the normal direction of the vertical surface φ. The results show that with the increases of Kt, Kn and φ, diffuse solar radiation on the vertical surface increases firstly and then decreases. But the ratio of vertical diffuse radiation to horizon diffuse radiation K is proportional to Kt and Kn and inversely proportional to φ.
Keywords:vertical surface, diffuse solar radiation, clearness index, direct radiation, transmittance, angle