摘要
我国既有建筑存量大,能耗高,改善既有建筑围护墙体的热工性能是实现建筑节能的重要举措。湿气是影响建筑耐久性的主要因素之一,因此在进行既有建筑围护墙体节能改造时需要综合考虑墙体的热湿特性。本文首先实验测量了历史青砖、烧结红砖和硅酸钙保温板3种建筑材料的热湿物性。其次,在天津气候条件下,模拟分析了以青砖和红砖为砌体材料的外墙在加装硅酸钙内保温系统前后的热湿性能,结果表明内保温外墙墙角内表面不存在表面结露和霉菌生长风险。最后,模拟研究了广州气候条件下典型红砖墙体加装硅酸钙内保温系统的可行性,发现该内保温系统同样适用于这一地区既有建筑围护墙体的节能改造。
China has a high number of existing buildings and the energy consumption of those buildings is extremely high.Improving the thermal performance of the existing building envelope is a major measure to achieve building energy conservation.Moisture is one of the main factors that influence the durability of buildings.Therefore,it is necessary to comprehensively consider the hygrothermal characteristics of the wall when implementing the energy renovation of the existing building structure.In this paper,the hygrothermal properties of the historical gray brick,red brick,and calcium silicate insulation board were measured through experiments.Then,the hygrothermal performance of the external gray-brick wall and red-brick wall before and after installing the calcium silicate interior insulation system was explored under the Tianjin climate condition.The results show that there is no risk of mold growth and surface condensation on the inner surface of the corner of the insulated walls.Finally,the applicability of the insulation system on the typical red-brick wall in Guangzhou climate condition was simulated,and it was found that the calcium silicate interior insulation system is also suitable for this region.
作者
赵建华
王岳
朱磊
张祺
张猛
ZHAO Jianhua;WANG Yue;ZHU Lei;ZHANG Qi;ZHANG Meng(School of Architecture,Tianjin University,Tianjin 300072,P.R.China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510641,P.R.China;Tianjin International Engineering Institute,Tianjin University,Tianjin 300072,P.R.China;Tianjin University Research Institute of Architectural Design and Urban Planning Co.,Ltd.,Tianjin 300072,P.R.China)
出处
《建筑科学》
CSCD
北大核心
2023年第8期143-151,共9页
Building Science
基金
亚热带建筑科学国家重点实验室开放研究基金(2022ZB12)。
关键词
既有建筑
节能改造
墙体热湿性能
材料热湿物性
内保温
existing building
energy-saving renovation
hygrothermal performance of wall assembly
hygrothermal property of building material
interior insulation
