换热器壳程局部传热系数的测定方法  

Measuring method for local heat transfer coefficient of shell-side of heat exchanger

作　　者：曾文良[1,2] 邓先和[1] 李志武[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室,广东广州510640 [2]衡阳师范学院化学与材料科学系,湖南衡阳421000

出　　处：《化学工程》2010年第2期13-17,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(20776046)

摘　　要：提出了一种适用于气体在换热器管束间的局部表面传热系数的实验测试方法。误差分析表明,该方法所产生的最大相对误差为5.11%;分别对空气纵向和横向冲刷正方形与正三角形2种排列方式的管束进行局部传热的实验和数值模拟研究,将实验结果、数值模拟结果与经验公式进行比较。研究表明:实验值与数值模拟、经验公式吻合较好,最大偏差小于10%;综合误差分析与实验结果比较,表明该方法简单、方便,并且可靠。A new method for measuring local heat transfer coefficient of shell-side of shell-and-tube heat exchanger with gas flow in tube bundles was proposed. The error analysis shows that the maximal relative error of this method is no more than 5.11%. The experimental and numerical simulation on the local heat transfer coefficient of air flow in staggered and in-line layout bundles in longitudinal and cross flow were carried out respectively. Comparing with the experimental result, numerical result and empirical data, it shows that the experimental result is consistency with the numerical result and literature empirical data; the maximal relative error is less than 10%. By error analysis and experimental result comparison, it shows that such method is simple, convenient and reliable.

关 键 词：局部传热系数 管壳式换热器 测试方法 

分 类 号：TQ051.5[化学工程]