外墙排风隔热机制及其热阻特性模拟研究  

Mechanism of Exhaust Air Insulation and Evaluation of the Equivalent Thermal Resistance in Envelope Wall by Simulation

作　　者：邹付熙 王劲柏[1] 张冲[1] 严清[1] 刘燕南[1] 徐新华[1] 

机构地区：[1]华中科技大学,武汉430074 [2]华南理工大学建筑设计研究院,广州510641

出　　处：《建筑科学》2015年第8期80-86,168,共8页Building Science

基　　金：国家自然科学基金项目"建筑外墙气流外渗隔热机制研究"(51378231);国家自然科学基金项目"内嵌管式围护结构的瞬态传热模型及实验研究"(51178201);中央高校基本科研业务费资助HUST"空调建筑轻质排风隔热墙体技术研究"(2014NY011)

摘　　要：提出1种新型外墙排风隔热机制,以及该墙体的四种结构:基本型、内衬型、夹层通风型和外保温型。以基本型结构为例,阐明隔热机制;通过二维稳态传热数值模型,计算当量热阻,并与普通非保温墙和外保温墙进行比较,结果表明排风隔热墙的隔热性能优越,具有潜在的节能应用价值。An Innovative Exhaust Air Insulation mechanism （EAI） is proposed for building envelope wall. Four types of the wall structure are introduced including, basic, board lined, sandwich ventilation and, external Insulation. The insulation mechanism by utilizing exhaust air is described with the basic EAI wall as an example. A two dimensional numerical model is developed to analyze the heat transfer across the wall. Equivalent thermal resistance is calculated for the basic structure with different parameters. Comparison of the resistance values are made with reference to the commonly employed externally insulated wall and the traditional brick wall. Result shows that the EAI wall possesses greatly advantageous thermal resistance and holds the potential of future engineering application.

关 键 词：建筑外墙 排风隔热机制 热阻 数值模型 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程] TU111.48