Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea


Analysis of the Net Radiation Heat Gain of Buildings by Changing Building Distance in Guangzhou and Sendai

Jialong Hu, Yingli Xuan, Akashi Mochida

Abstract: The present authors have previously conducted the optimization study of building arrangement from the viewpoint of outdoor thermal acceptability. However, on the other hand, it is also necessary to examine building arrangement in terms of indoor energy consumption. This study investigated the net radiation heat gain of building exterior surface by changing building distance, and clarified the reduction potential of cooling load of a single building and a cluster of buildings with different building arrangements. Guangzhou, China and Sendai, Japan were selected to investigate the influence of different solar altitudes. The simulation results showed that the exposure level and orientation of the surfaces were closely related to heat gain of the surfaces. Cooling load per square meter can be reduced by decreasing building distance, and the potential reduction of cooling load can also be expected by changing the thermal properties of the surfaces. With regard to energy consumption in a certain area, controlling the heat gain of the whole buildings is more effective compared to that of a single building.
Keywords: Building distance, Building shadow, Heat gain, Shortwave radiation, Longwave radiation
Pages: 243 - 250