泡沫玻璃外墙外保温系统温度场的数值模拟  

Numerical Simulation of External Foam Glass Thermal Insulating System on Walls

作　　者：周志超[1,2] 牛志荣[2] 熊厚仁[2] 许太业 

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州341000 [2]嘉兴学院建筑工程学院,浙江嘉兴314000 [3]山西省人力资源和社会保障厅,太原030001

出　　处：《建筑节能》2012年第4期43-46,53,共5页BUILDING ENERGY EFFICIENCY

基　　金：浙江省科技计划项目(2009C31042);嘉兴市重点实验室项目;嘉兴市重点科技创新团队项目

摘　　要：计算数据来源于泡沫玻璃外墙外保温系统墙体大型耐候性试验,结合COMSOL软件分别对泡沫玻璃外墙外保温系统耐候性试验的高温—淋水循环和加热—冷冻循环进行了数值模拟。以在耐候性试验机箱体内的环境实时温度作为试验墙体的温度条件,墙体内外表面考虑对流换热边界条件,忽略热辐射的影响,并且忽略层间热阻。对泡沫玻璃外保温系统的主要功能层沿厚度方向和同一层平面不同位置的温度场进行比较,模拟结果表明泡沫玻璃外保温系统具有良好的保温作用,窗户等周围部位是外保温墙体的薄弱位置,温度场和温度应力变化较大,易产生裂缝,在实际工程中应给予重视。The calculated data are from the large insulation system for foam glass exterior insulation wall. The weathering resistance of high temperature-shower cycles and hot-cold cycles is numerically simulated with COMSOL. The real time environmental temperature in the test box for weather resistance is considered as the temperature condition of experimental wall, as well as the convective heat transfer bound- ary conditions on the internal and external wall sugface. Both the influence of thermal radiation and the thermal resistance between the layers are ignored. The temperature-field conditions are compared along the thickness direction of main functions＇ layers and on various points at the same plan for the external theimal insulation system. The simulation results indicated that the foam glass exterior insulation system has good heat preservation, such as window is the weak position, where the temperature field and the temperature stress changes greatly, and it is easy to crack and should be given attention in practical projects.

关 键 词：外墙外保温系统 耐候性 温度场 泡沫玻璃 

分 类 号：TU111.4[建筑科学—建筑理论]