围护结构热质耦合传递实验研究  

EXPERIMENT STUDY ON HEAT AND MASS COUPLED TRANSFER OF ENVELOPE

作　　者：孔凡红[1] 郑茂余[2] 

机构地区：[1]中南大学能源科学与工程学院,长沙410075 [2]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《太阳能学报》2010年第7期879-884,共6页Acta Energiae Solaris Sinica

摘　　要：对单层围护结构热质耦合传递过程进行了实验研究。在建立围护结构墙体时,预留一块围护结构用炉渣混凝土砌块测量其孔隙率,初始体积含湿量,干、湿状态的导热系数以及完全干燥状态的密度,并计算砌块固体骨架的导热系数。实验测量321d,该文对实验结果进行了分析,分析结果表明:随着边界条件的变化,围护结构表面及内部温度能够很快达到平衡;但由于湿扩散速度比热传递速度慢得多,因此只有围护结构内外表面的相对湿度受边界条件影响,围护结构中间的相对湿度稳定并持续很高。The heat and mass coupled tansfer of single layer envelope was studied experimentally. When it is time build- ing envelope, a piece of slag concrete brick should be left beforehand in order to measure its porosity, initial moisture volume content, moisture state heat conductivity coefficient and dry density. The heat conductivity coefficient of solid framework will be obtained. The experiment result measured for 321 days was analyzed. The result showed that with the changing of boundary condition, the surface and inner temperature of envelope will almost change synchronously. Howev- er, only the surface relative humidity is affected by boundary condition due to slow moisture transfer rate, the inner rela- tive humidity of envelope is steady and high.

关 键 词：围护结构 热质耦合传递 实验研究 初始体积含湿量 湿扩散速度 

分 类 号：TU111.24[建筑科学—建筑理论]