各向同性与各向异性散射模型在建筑辐射模拟中的对比研究
Difference between anisotropic and isotropic diffuse radiation models in building radiation simulation
摘要：
以上海某辐射站实测辐射数据为基础，分别用各向异性散射模型（NADR模型）和各向同性散射模型构建建筑群短波辐射计算模型，用Matlab对不同尺寸建筑进行辐射值模拟。结果显示：对于单体建筑，各向同性散射模型各朝向太阳散射辐射模拟值偏小；对于建筑群中的建筑，其各朝向太阳散射辐射模拟值亦偏小，且随着建筑物高长比的增大，2种模型模拟差值略有增加。建议在模拟建筑整墙上某点或整墙平均辐射值时使用各向异性散射模型。
Abstract：
Based on the measured radiation data of a radiation station in Shanghai, constructs shortwave radiation calculation models for building groups using the anisotropic diffuse radiation model (NADR model) and isotropic diffuse radiation model, respectively. Simulates radiation values of different buildings using Matlab. The results show that diffuse radiation simulation values under the isotropic diffuse radiation model are relatively small in all orientations for individual building. For those in building groups, diffuse radiation simulation values in all orientations are also relatively small. The difference of simulation values between two models is slightly increased as the ratio of buildings’ height and length increases. Suggests that the NADR model can be applied to simulate radiation values of a point on a wall or an entire wall.
Keywords:diffuse radiation, anisotropic, isotropic, radiation model, air conditioning load calculaticn