摘要
围护结构热桥降低了墙体的平均热阻,这不仅增加了围护结构的局部传热从而增加建筑能耗,而且改变了围护结构内表面的温度环境,引发建筑的结露现象。使用红外热成像仪对天津市的轻木结构建筑围护结构进行红外热测试分析,发现轻木结构建筑围护结构存在热桥现象;通过二维传热模拟软件PTemp对目前轻木结构建筑围护结构的保温构造做法进行传热模拟,验证了轻木结构建筑围护结构的保温构造做法的确存在热桥现象;在此基础上,采用“外墙外保温”、“错位墙骨柱保温”及“双墙骨柱保温”3种优化构造做法,并经模拟分析比较后发现3种优化构造做法均能解决围护结构热桥问题,其中,采用“外墙外保温”的构造做法适用范围更广、成本更低、更符合设计要求而值得推广应用。
The thermal bridge of the building envelope reduces the mean thermal resistance of the wall, which not only increases the local heat transfer of the building envelope and increases the building energy consumption, but also changes the temperature environment of the inner surface of the building envelope and causes the dewing phenomenon of the building. The infrared thermal imager is used to test and analyze the envelope of light wood frame structure buildings in Tianjin, and it is found that there is a thermal bridge phenomenon in the envelope of light wood frame structure buildings;Then the two-dimensional heat transfer simulation software PTemp is used to simulate the heat transfer of the current thermal insulation structure of light wood frame structure building envelope, and it is verified that the thermal bridge phenomenon does exist in the thermal insulation structure of light wood frame structure building envelope;On this basis, three optimized construction methods are adopted, including “external wall external insulation”, “dislocation stud insulation” and “double stud insulation”. After simulation analysis and comparison, it is found that the three optimized construction methods can solve the problem of thermal bridge of envelope structure. Among them, the construction method of “external wall external insulation” has wider application scope and lower cost. It is more in line with the design requirements and worthy of popularization and application.
作者
苗展堂
骆玉潇
张昱坤
国麟起
MIAO Zhantang;LUO Yuxiao;ZHANG Yukun;GUO Linqi(College of Architecture,Tianjin University,Tianjin 300072,China;Tianjin TMJD Low Carbon Residential Technology Development Co.,Ltd.,Tianjin 300191,China)
出处
《建筑节能（中英文）》
CAS
2023年第1期71-78,共8页
Building Energy Efficiency
基金
国家重点研发计划课题“乡村住宅空间优化设计技术与指标体系研究”(2018YFD1100901)。
关键词
轻木结构
保温
热桥
红外热成像仪
PTemp
light wood frame construction
heat preservation
thermal bridge
infrared thermal imager
Ptemp
