寒冷地区复合自保温砌块墙体热湿耦合迁移特性研究  

Coupled Heat and Moisture Transmission Characteristics of Self-insulation Block Walls in Cold Regions

作　　者：郑伟花 苏园 高芸 ZHENG Wei-hua;SU Yuan;GAO Yun(College of Civil Engineering and Architecture,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学建筑工程学院,保定071002

出　　处：《科学技术与工程》2024年第16期6828-6835,共8页Science Technology and Engineering

基　　金：河北大学高层次人才引进项目(521000981383)。

摘　　要：为研究自保温砌块墙体的热湿耦合传递规律,将当前主流构造型式的复合自保温砌块墙体与同等厚度的外保温墙体进行对比。以寒冷地区保定市为例,通过数值软件进行模拟计算,分析自然环境下墙体内部的热湿耦合传递过程。模拟结果表明:自保温砌块墙体的保温隔热效果优于外保温墙体。在夏季工况下,墙体湿风险较低,不存在霉菌滋生与冷凝风险。在冬季工况下,自保温砌块墙体内部湿风险均高于外保温墙体。填芯自保温砌块墙体、夹芯自保温砌块墙体、外保温墙体内部相对湿度最大值分别为73.9%、92.1%、68.6%。其中,夹芯自保温砌块由于空腔的存在降低了墙体的传湿阻力,相对湿度超过80%,湿积累明显且霉变风险较大,使得墙体长期使用稳定性与保温性能受到影响。因此,填芯自保温砌块具有更好的适用性,有利于减小建筑热湿负荷,降低建筑能耗水平。In order to study the heat and moisture coupling transfer law of self-insulated block wall,the composite self-insulated block wall of the current mainstream construction type was compared with the externally insulated wall of the same thickness.Taking Baoding City,a cold region,as an example,simulation calculations were carried out through numerical software to analyse the heat and moisture coupling transfer process inside the wall under the natural environment.The simulation results show that the thermal insulation effect of the self-insulated block wall is better than that of the externally insulated wall.Under summer conditions,the wall has a low risk of moisture,and there is no risk of mould growth and condensation.In winter conditions,the internal moisture risk of self-insulated block walls is higher than that of externally insulated walls.The maximum values of internal relative humidity of core-filled self-insulating block walls,sandwich self-insulating block walls,and externally insulated walls are 73.9%,92.1%,and 68.6%,respectively.Due to the existence of cavity inside the sandwich self-insulating block makes its moisture transfer resistance reduced,the moisture accumulation is obvious and the risk of mould is larger,it is difficult to ensure the long-term stability and thermal insulation performance of the wall.The core-filled self-insulating block has better applicability,which is conducive to reducing the heat and humidity load of the building and lowering the energy consumption level of the building.

关 键 词：热湿耦合 自保温砌块 数值模拟 寒冷地区 

分 类 号：TU111.4[建筑科学—建筑理论]