夏热冬冷地区外墙保温体系有限元分析

Finite element analysis on the external wall insulation system in hot summer and cold winter area

以有限元ANSYS软件对夏热冬冷地区不同墙体保温体系进行建模,计算分析不同墙体保温形式的温度场。研究结果表明:几种外墙保温体系的建筑热桥部位内表面都不会产生结露现象;在保证外墙主体传热系数相等的条件下,外墙保温体系保温效果依次为:外保温体系、热桥处理型自保温体系、内保温体系、自保温体系;自保温体系和内保温体系的热桥效应比较明显,而热桥处理型自保温体系能够达到与外保温体系接近的保温效果,所以可在夏热冬冷地区推广使用。

The temperature field of different external wall insulation systems in hot summer and cold winter area have been calculated and analyzed by establishing module with ANSYS.The results show that internal surface of thermal bridge sites with different external wall insulation systems do not exist condensation problems.When heat transfer coefficient in the major body of external wall is equal,the heat preservation effect of external thermal insulation systems is in the following decreasing order：external thermal insulation,external thermal self-insulation of thermal bridge,internal thermal insulation,external thermal self-insulation.However,the thermal bridge effects of external thermal self-insulation and internal thermal insulation system are obvious.External thermal self-insulation system of thermal bridge can achieve the same thermal insulation effect with external thermal insulation system.Therefore,it should be widely spread and used in hot summer and cold winter area.