Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA


Effect of the Application between Anisotropic and Isotropic Diffuse Radiation Model on Building Diffuse Radiation Heat Gain

Zhengrong Li, Haowei Xing, and Shiqin Zeng
School of Mechanical and Engineering, Tongji University, Shanghai, China

Abstract: The Isotropic Diffuse Radiation Model and Anisotropic Diffuse Radiation Model have been widely applied to building thermal simulation, however, their different performance in simulation have not been fully studied, especially the simulation of building groups. Based on radiation data collected by a radiation station in Shanghai(121.208°E, 31.290°N), an Anisotropic Diffuse Radiation Model(NADR model) and Isotropic Diffuse Radiation Model(IDR model) were used to simulate irradiance values for individual building and building groups, respectively. The analysis results show that diffuse radiation simulation value under the Isotropic Diffuse Radiation Model is relatively small in all orientations for individual building and building groups, except the north. Moreover, the potential impact of applying Isotropic Diffuse Radiation Model on results for thermal simulation and practical application is briefly illustrated. Keywords: diffuse radiation, anisotropic, radiation model
Pages: 430 - 436