透过多孔介质板的热湿传递的实验研究  

Experimental Research of Heat and Moisture Transfer Through Porous Media Plate

作　　者：王世学[1] 王飞[1] 张星[1] 杨博[1] 

机构地区：[1]天津大学机械学院中低温热能高效利用教育部重点实验室,天津300072

出　　处：《工程热物理学报》2015年第9期1961-1965,共5页Journal of Engineering Thermophysics

基　　金：科技部国际合作项目(No.2011DFA60290)

摘　　要：本文以透过燃料电池增湿系统中多孔介质板的热湿传递过程为研究对象,建立了实验系统,测量并比较了高温高湿气体(增湿气体)透过多孔介质板对低温低湿气体(被增湿气体)进行加热加湿时,气体的相对流向、温度与相对湿度等对多孔介质板热湿传递特性的影响。结果表明,在使用相同的多孔介质板的前提下,使用逆流流向、提高增湿气体进口温度和相对湿度对多孔介质板两侧的换热和水分传递量的提高更加有利;同时,使用逆流流向、提高增湿气体进口温度以及降低其相对湿度有助于水分回收率的提高。Aiming at a kind of porous media plate used in a fuel cell humidifier, an experimental measurement system was set up to study the characteristics of heat and moisture transfer through the plate. Using this system, the relative direction of flow, the temperature and relative humidity of humidifying and humidified gas was measured. The influence of those factors on the characteristics of heat and moisture transfer through the porous media plate was compared. The results showed that, when the same kind of porous media plate improving inlet temperature and relative humidity was used, using countercurrent condition of flow, of humidifying gas can help to the improvement of the amount of heat and moisture exchange. Adopting countercurrent condition of work, improving inlet temperature of humidifying gas and reducing relative humidity of it can improve water recovery ratio（WRR）.

关 键 词：燃料电池 增湿器 多孔介质板 热湿传递 

分 类 号：TK91[动力工程及工程热物理]