高效复合强化换热器的管程性能  

Tube side performance of new efficient composite enhanced heat exchanger

作　　者：朱冬生[1] 安冬旭[1] 李霞[1] 张立振[1] 朱辉[1] 于腾祥[1] 

机构地区：[1]华东理工大学机械与动力工程学院、承压系统与安全教育部重点实验室,上海 200237

出　　处：《化工学报》2014年第2期453-459,共7页CIESC Journal

基　　金：华东理工大学交叉学科与重大项目培育基金项目(WG1013009)

摘　　要：通过搭建内螺纹扭曲椭圆管复合强化管换热器传热与压降性能测试平台,对内螺纹扭曲椭圆管复合强化管换热器的管程传热和流阻性能进行了实验研究,以实验数据为基础拟合得到其对流传热系数和流动摩擦阻力系数与管内流体Reynolds数的计算准则关系式,将内螺纹扭曲椭圆管与光滑圆管、内螺纹圆管、光滑扭曲管的管程传热、流阻以及综合性能进行对比分析,结果显示内螺纹扭曲管流动阻力略高于其他类型的换热管,传热效果和综合性能明显优于其他类型换热管。内螺纹扭曲管作为一种内螺纹和扭曲扁管强化传热技术的叠加技术,强化传热效果明显,具有重要的工程应用价值。By building a platform for testing heat transfer and pressure drop performance, the thermal performance and flow resistance on the tube side of an internally ribbed twisted tube heat exchanger are examined. Based on the experimental result, correlations for the heat transfer coefficient and friction factor with tube side Reynolds number are obtained. This paper compares and analyzes the heat transfer, pressure drop and comprehensive performance of internally ribbed twisted tube, smooth twisted tube, internally ribbed circular tube, and general smooth tube with similar geometric parameters. The results show that although the internally ribbed twisted tube gives slightly higher flow resistance, it presents the highest heat transfer coefficient and comprehensive performance among these tubes. The coupled enhancement effects for heat transfer resulted from internal rib and twisted tube are obvious, and this structure will be widely used in the industry.

关 键 词：内螺纹扭曲椭圆管 管程传热膜系数 管程压降 传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]