湿迁移对围护结构传热系数地域差异性影响研究  

Influence of Moisture Transfer on Building Enclosure's Heat Transfer Coefficient among Regional Differences

作　　者：陈飞[1] 刘艳峰[1] 马超[1] 王莹莹[1] 王登甲[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院

出　　处：《建筑热能通风空调》2017年第1期6-11,共6页Building Energy & Environment

基　　金：教育部博士点专项基金(20136120120003);国家自然科学基金青年基金项目(No.51508443)

摘　　要：建立以温度和相对湿度为驱动势的热湿耦合传递模型。分析了不同热湿环境条件下墙体传湿对传热的影响,并根据湿分区和气候分区研究典型城市墙体湿迁移作用下传热系数变化。结果表明:夏季炎热潮湿地区湿迁移对传热影响最大,其中合肥地区加气混凝土墙体传热系数修正率可达到17.2%;冬季湿迁移引起的传热量变化显著低于夏季;冬季寒冷干燥的兰州湿迁移引起的传热量变化最大,约为0.5W/m2,传热系数修正最大,约为3.4%。给出不同气候分区和湿分区下典型城市三种常见围护结构传热系数修正,以期为准确计算建筑冷热负荷和能耗提供基础。A dynamic mathematical model of coupled heat and moisture transfer through wall was proposed and the relative humidity and temperature were chosen as the driving potentials. And the influences of moisture transfer of the wall on heat transfer under different conditions is analyzed. Moreover, changes of walls＇ heat transfer coefficient in typical cities under the function of moisture migration are researched based on wetness and climate subdivision. The results show that： moisture migration of a humid area in summer has the maximum influence on heat transfer, wherein the correction rate of heat transfer coefficient of aerated concrete wall can reach to 17.2% in Hefei, changes in heat-transfer capacity caused by moisture migration in winter are significantly less than those in summer. Heat transfer caused by moisture migration in Lanzhou which is cold and dry in winter has the maximum change about 0.5 W/m2, and has the maximum correction of the heat transfer coefficient, about 3.4%. Corrections of heat transfer coefficient of three common enclosure structures in the typical cities in different climate and wetness subdivision are given to accurately calculate the buildings＇ cooling and heating load and energy consumption.

关 键 词：湿迁移 围护结构 传热系数 地域性差异 

分 类 号：TU111.4[建筑科学—建筑理论]