扁管换热元件强化传热特性分析  

The analysis of heat transfer enhancement characteristic for flat tube

作　　者：贺士晶[1] 王松庆[1] 刘曙光[1] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《山西建筑》2017年第28期197-198,共2页Shanxi Architecture

基　　金：中央高校基本科研业务费专项资金项目(项目编号:DL11BB30)

摘　　要：针对扁管换热元件,从提高换热面积和增强流体湍流程度两方面,通过横截面积对比和对管内流体流动状态进行模拟分析,对其强化传热特性进行了研究,结果表明扁管与传统圆管相比可以提高传热面积,换热器壳径相同时,扁管布管比圆管多,大大提高了壳程空间的利用率,并且相同管内流量的情况下管内流速增加,增大了管内流体的湍动程度,有利于促进热量的传递,扁管的管内对流传热要好于圆管。The analysis on heat transfer enhancement characteristic for flat tube,which was considered both enhancing heat exchange area and increasing the extent of fluid turbulent,was carried out by cross-sectional area comparison and fluid flow state simulation in the tube. Compared with the circular tube,the result indicates that the area of heat exchange tube is increased. And the utilization rate of the shell space with different number of tubes,under the same shell diameter,is improved obviously. Under the same rate of flow,the velocity of flow is increased which could improve heat transfer for turbulent degree variation. The effect of convective heat transfer is better than circular tube.

关 键 词：扁管 强化传热 传热特性 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]