湿传递对墙体热传递的影响关系研究  

STUDY ON THE INFLUENCE OF MOISTURE TRANSFER ON THE WALL HEAT TRANSFER

作　　者：王莹莹[1] 刘艳峰[1] 王登甲[1] 刘加平[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《太阳能学报》2014年第7期1151-1157,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51178375);国家自然科学基金创新研究群体资助项目(50921005)

摘　　要：建立以相对湿度和温度为驱动势的热湿耦合传递数学模型,并对模型准确性进行验证。以松木板和混凝土为例,利用所建数学模型对其在不同热湿环境下进行计算分析,结果发现:松木板的吸放湿性明显强于混凝土,湿流量为混凝土的5.3倍;考虑与未考虑传湿情况相比,松木板内表面温度低1.1℃,混凝土仅低0.2℃;在考虑传湿情况下,松木板内表面潜热热流占总热流的45%,而混凝土内表面潜热热流仅占总热流的8.3%。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. The model accuracy was verified by experimental data. Take pine wood and concrete for example, this paper calculated their heat transfer process under different hot wet environment using the established mathematical model. The results showed that the moisture absorbing-releasing behavior of pine wood is stronger than that of concrete, and the moisture flow is 5.3 times of concrete. The pine wood and concrete interior surface temperature considering moisture transfer is 1.1℃ and 0. 2 ℃ lower than not considering moisture transfer respectively. When the moisture transfer is taken into account, the pine wood surface latent heat flux will account for about 45% of total heat flux, and the concrete surface latent heat flow will only account for about 8.3% of total heat flux.

关 键 词：热湿耦合传递 相变潜热 温度 热流 湿流 

分 类 号：TU111.4[建筑科学—建筑理论]