建筑墙体内部或表面在高湿环境或产生结露时会增加建筑能耗、诱发霉菌等微生物滋生，进而导致室内空气品质(IAQ)恶化和墙体耐久性降低等问题发生。工程中一般采用蒸汽渗透理论计算墙体内热湿分布进而判定墙体是否产生结露，该方法忽略热湿和空气相互作用、液态水分迁移和毛细凝结作用对热湿分布的影响，甚至忽略墙体表面微生物滋生对IAQ的影响。本项目将采用实验和理论相结合方法对材料孔隙特性、动态边界条件下典型墙体热湿分布、结露区域和微生物滋生等问题进行研究，探索多孔材料孔隙特性、墙体内热湿和空气耦合传递以及微生物滋生机理，得到判定墙体结露新依据、墙体内热湿分布和微生物滋生情况，对揭示建筑墙体内结露和微生物滋生规律有重要意义，为提出适宜的防结露和微生物滋生的控制方法奠定基础。项目成果为确定墙体结露机理提供实验和理论支撑，为预防墙体结露和微生物滋生提供技术保障和理论基础,为降低建筑能耗和提高IAQ提供科学依据。

When the inside or surface of building enclosure is in high humidity environment or condensation, which makes building energy consumption increasing, mould growth, indoor air quality (IAQ) deteriorating and durability lower. Vapor transfer theory is used to calculate hygrothermal distribution and determine condensation in building enclosure in engineering generally, without consideration of the influence of heat and air on moisture transfer, meanwhile, ignoring liquid water transfer and capillary condensation and the influence of mould growth.So this project will combine experimental and theoretical methods to analyze pore characteristics of porous materials, hygrothermal distribution of typical building enclosure in steady and unsteady boundary condition, condensation zone and mould growth and so on. Discover pore character of porous materials, coupled of heat, moisture and air transfer mechanism and physical model and mould growth physical model. Obtain the new condensation principle depending on the capillary condensation theory, heat and moisture distribution and mould growth situation, which has a huge meaning for revealing the rule of condensation and mould growth in building enclosure, and which will be the foundation to put forward appropriate avoiding condensation and mould growth controlling method. The achievement of this project will support the experimental and theoretical research of condensation mechanism of building enclosure, offer the technical support and theoretical foundation of avoiding condensation and mould growth of building enclosure, and provide science basis to increase IAQ.