Energy Comsuption Research Of Double Skin Facade In The Hot Summer And Cold Winter Zone

Double skin facade (DSF) system is used in high-rise buildings increasingly in the hot summer and cold winter zone in China, due to its advantages in sound proof and energy efficiency, when compared with single skin facade. Based on Hangzhou’s typical climatic data, this paper found that the room heat gain throught the DSF can expressed as a liniear relation of two other variables, the solar radiation and the temperature difference between the room and the ambient. This relation implied two characteristics:the solar heat gain coefficient and the heat transfer coefficient. Such relation was validated for double glazing system using the experimental data from EMPA (Eidgenossische Material-prufungsanstalt-labrotary).Using the same CFD simulation method, we also studied three factors (cavity width, opening size and story height) influencing the room heat gain of DSF. Proper cavity width and opening size would improve the thermal characteristics of DSF, while story height had insignificant influence on the thermal characteristics of DSF.Using such relation, we estimated the DSF energy performance for the winter season (December to February) and the summer season (June to August) in Hangzhou using data for a typical meteorological year. The selected DSF has a low solar heat gain coefficient. Calculation showed that the DSF saved energy in summer by reducing the cooling load while was less energy efficient in winter by reduced the solar heating. This result implies that in design practices, the solar shading capabilities should be separated from the window system and is controllable to meet both the needs of summer and winter.The last chapter summerizes the conclusion, existing problem and further prospect of the paper.