封闭空腔受潮的一种机理:热湿效应  

Mechanism of Damping in Closed Cavities:Thermo-Humidity Effect

作　　者：杨木林 YANG Mulin(State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430077,China)

机构地区：[1]国网湖北省电力有限公司,湖北武汉430077

出　　处：《湖北电力》2023年第3期49-54,共6页Hubei Electric Power

摘　　要：为探索隐藏的电气装备封闭空腔受潮机理,对受潮原因未得到有效解释的案例剖析后,提出热湿效应的猜测命题;对该命题进行基于热扩散理论的演绎证明和基于观察事实的归纳证明,同时类比建立命题的数学模型,对模型进行了实验确证。结果表明:如果空气中存在温度梯度,则一定存在因热湿效应导致的与温度梯度方向一致的水蒸气浓度梯度;如果封闭空腔内外存在温度差,则一定存在因热湿效应导致的与此温度差方向一致的水蒸气浓度差。讨论得到:热湿效应是基础物理现象,是水蒸气传递的普遍规律;它是导致电气装备封闭空腔受潮的独立重要原因,可供各行业相关领域参考。In order to explore the mechanism of moisture exposure in the enclosed cavity of hidden electrical equipment,this paper puts forward a conjecture proposition of thermo-humidity effect after analyzing the cases of moisture exposure which have not been effectively interpreted,and then makes a deductive proof of the proposition based on thermal diffusion theory and an inductive proof based on observed facts,and at the same time,establishes a mathematical model of the proposition by analogy,with the model verified by experiment.The results are shown as below:If there is a temperature gradient in the air,there must be a water vapor concentration gradient in the same direction as the temperature gradient due to thermo-humidity effect.If there is a temperature difference between the inside and outside of the enclosed cavity,there must be a water vapor concentration difference in the same direction as this temperature difference due to thermos-humidity effect.Discussion comes to the conclusion that thermohumidity effect is a basic physical phenomenon and a general law of water vapor travelling,and is an independent and important cause of moisture exposure in the enclosed cavity of electrical equipment,which can be used for reference in related fields of various industries.

关 键 词：电气装备 封闭空腔 防潮除湿 热扩散 热湿效应 

分 类 号：TM561[电气工程—电器] TM591TM595