置换通风加冷却顶板系统避免结露和下降气流的方法  

Methodology of avoiding condensation and downdraft in displacement ventilation plus cooling ceiling system

作　　者：王晋生[1,2] 龙惟定[2] 董涛[2] 王庆莉[2] 杨秀泉[1] 

机构地区：[1]解放军理工大学 [2]同济大学

出　　处：《暖通空调》2009年第1期27-32,共6页Heating Ventilating & Air Conditioning

摘　　要：提出了一种避免结露和下降气流的方法:用对长波具有高透过性的薄膜密封包裹冷却顶板,该薄膜和冷却顶板下表面之间保留一空气或真空夹层。实验测试了办公室内的温度场、速度场和CO2浓度场,结果显示薄膜的温度等于或大于冷却顶板下表面和室内空气温度的平均值,薄膜表面和冷却顶板不可能结露,下降气流也相应减少,冷却顶板的制冷量基本保持不变。Puts forward the method of covering the cooling ceiling with the diathermanous film having high penetration rate for long wave radiation, and there being a layer of air or vacuum between the ceiling undersurface and the film. Measures the temperature, velocity and concentration fields in an office. The results show that the film temperature is equal to or greater than the average temperature of ceiling undersurface and indoor air, making the condensation on the film and ceiling much less possible, the downdraft reduced, and the cooling capacity of the cooling ceiling almost kepts unchangeable.

关 键 词：置换通风 冷却顶板 结露 下降气流 透过率 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程] P433[天文地球—大气科学及气象学]