节能2024，Vol.43Issue(6)：10-13,4.DOI:10.3969/j.issn.1004-7948.2024.06.003
寒冷地区热湿耦合下墙体热桥的模拟研究
Simulation study on thermal bridging of wall in cold regions under the coupled heat and moisture transfer
摘要
Abstract
Under cold region climatic conditions,a thermo-humid coupling model is established using the COMSOL Multiphysics simulation software to simulate the thermal bridge at the corner formed by the reinforced concrete column and the red brick masonry wall.The results indicate that the effect of moisture transfer leads to lower internal surface temperatures of the wall compared to when only heat transfer is considered,and the impact of moisture transfer on the thermal conductivity of building materials cannot be neglected under actual working conditions.The influence of thermal bridges increases the heat flux of the enclosure structure by 19.6%,and the area affected by thermal bridges is about 0.4 m away from the most unfavorable point.With the same thickness of insulation board,the internal surface temperature of the wall with external insulation is higher than that with internal insulation,resulting in better insulation effect.As the thickness of the insulation board increases,the internal surface temperature of the wall rises,and the heat flux on the internal surface of the wall decreases.To reduce the heating energy consumption of the room in winter,the condensation phenomenon on the wall can be resolved by external insulation at the thermal bridge locations.关键词
热湿耦合传递/热桥效应/露点温度/热湿模拟Key words
coupled heat and moisture transfer/thermal bridge effect/dew point temperature/heat and moisture simulation分类
建筑与水利引用本文复制引用
李会敏,王海涛,魏家骅,李建..寒冷地区热湿耦合下墙体热桥的模拟研究[J].节能,2024,43(6):10-13,4.基金项目
河南省科技攻关项目(项目编号:232102320225) （项目编号:232102320225）
河南省粮油仓储建筑与安全重点实验室开发课题(项目编号:2022KF05) （项目编号:2022KF05）
