严寒地区墙体冻融条件下热湿特性研究
STUDY ON THE CHARACTERISTICS OF HEAT AND MOISTURE CHANGES IN WALLS UNDER FREEZE-THAW CONDITIONS IN SEVERE COLD REGIONS
岳琰 1王海燕 1王芳 1王砚玲1
作者信息
- 1. 哈尔滨工业大学建筑与设计学院,寒地城乡人居环境科学与技术工业和信息化部重点实验室,哈尔滨 150090
- 折叠
摘要
为研究严寒地区典型墙体冻融条件下的热湿变化,以哈尔滨地区为例,通过Delphin模拟分析了相同传热系数下,不同基层材料的4种外保温复合墙体内部含水量、含冰量、湿累积和导热系数的变化特征.研究结果表明,4种墙体的结冰只发生在保温层,含冰量基本呈逐年递减;基层材料为加气和泡沫混凝土的复合墙体,其湿累积量在前4年显著下降;4种墙体保温层导热系数在含湿状态下相较于干燥状态的增幅分别为1.06、1.15、1.16、1.12倍,而混凝土层的导热系数增幅则分别为0.02、0.38、2.61、4.36倍.研究可为严寒地区典型墙体的热湿特性分析和节能设计提供参考.
Abstract
To investigate the thermal and moisture variations of typical wall structures under freeze-thaw conditions in cold regions,this study uses Harbin as a case example.Using Delphin simulation,the changes in internal mois-ture content,ice content,moisture accumulation,and thermal conductivity of four types of external insulated compos-ite walls with the same thermal conductivity coefficient and different base materials were analyzed.The results indi-cate that freezing occurs only in the insulation layer,with the ice content decreasing annually.The moisture accumu-lation in composite walls made of aerated concrete and foam concrete significantly decreases over the first four years.The increase in thermal conductivity of the insulation layer in moist conditions compared to dry conditions is 1.06,1.15,1.16 and 1.12 times for the four wall types,while the increase for the concrete layer is 0.02,0.38,2.61 and 4.36 times,respectively.This research provides valuable insights for analyzing the thermal and moisture characteris-tics of typical wall structures in cold regions and for energy-efficient design.
关键词
严寒地区/建筑外墙/复合保温墙体/湿累积量Key words
severe cold area/building facades/composite insulated walls/moisture accumulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据