城墙式叉流空气-空气换热器传热特性实验研究  

Experimental study on characteristics of heat transfer of wall-mounted cross-flow air-to-air heat exchanger

作　　者：霍秋凝 刘泽勤 Huo Qiuning;Liu Zeqin(Key Laboratory of Tianjin Refrigeration Technology,Engineering Research Center of the Ministry of Education of Refrigeration Technology,Engineering Center of Tianjin Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China)

机构地区：[1]天津商业大学机械工程学院,冷冻冷藏技术教育部工程研究中心,天津市制冷技术重点实验室天津市制冷技术工程中心,天津300134

出　　处：《低温与超导》2020年第6期93-97,102,共6页Cryogenics and Superconductivity

基　　金：天津商业大学校级科技项目(201610069132)。

摘　　要：通过改变空气-空气换热器送风速度和室内外温差两种变量参数,对板间距为5 mm的城墙式叉流空气-空气换热器换热效率进行传热特性实验研究。研究表明:(1)当送风速度为0.5 m/s时,换热器显热效率达到89%,相较于送风速度为4 m/s时,城墙式叉流空气-空气热交换器换热效率越高。(2)当室内外温差为14℃时,换热器显热效率达到93.8%,相较于室内外温差为4℃时,芯体通道内芯材传热因子增加,平均传热系数随之增加,换热器显热效率高51.8%,即送风温差越大,城墙式叉流空气-空气热交换器换热效率最高。By changing two variable parameters of air-air heat exchanger air supply speed and indoor and outdoor temperature difference,the heat transfer characteristics of the wall-mounted cross-flow air-air heat exchanger with a plate spacing of 5 mm were experimentally studied.Studies show that when the supply air speed is 0.5 m/s,the sensible heat efficiency of the heat exchanger reaches 89%,compared with 4 m/s,the lower the wall air cross flow the more efficient the air-to-air heat exchanger is;When the indoor and outdoor temperature difference is 14℃,the sensible heat efficiency of the heat exchanger reaches 93.8%.Compared with the indoor and outdoor temperature difference of 4℃,the core material heat transfer factor in the core channel increases,and the average heat transfer coefficient increases.The sensible heat efficiency of the heat exchanger is 51.8%higher,that is,the larger the temperature difference of the supply air,the wall-type cross-flow air-air heat exchanger has the highest heat exchange efficiency.

关 键 词：城墙式叉流空气-空气换热器 送风速度 室内外温差 换热效率 

分 类 号：TB651[一般工业技术—制冷工程]