文献类型：期刊文献

中文题名：预测管壳式换热器温度分布的模型

英文题名：Model of predicting temperature distribution in shell-and-tube heat exchanger

作者：雷俊杰[1];周帼彦[1];朱冬生[1]

机构：[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

年份：2011

卷号：39

期号：11

起止页码：30

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：教育部交叉学科与重大项目培育基金;承压系统与安全教育部重点实验室重点科研基地专项基金

语种：中文

中文关键词：微分法;温度分布;管壳式换热器;单相

外文关键词：differential theory; temperature distribution; shell-and-tube heat exchanger; single phase

摘要：基于微分法,提出了一种简单但精确的单相管壳式换热器温度分布计算模型。根据折流板数Nb和管程数n,将换热器划分成(Nb+1)个大单元,(Nb+1)n个子单元,管程流体顺次流过子单元,壳程流体平行流过大单元。以HTRI方法为基准,分别采用本模型和Cell模型对U型管式和浮头式换热器温度分布情况进行计算,通过与HTRI的计算结果比较,验证了该计算模型的可行性和准确性。结果表明:相同操作条件下,该文模型和Cell模型计算BEU型换热器管程温度分布最大误差分别为0.19%和1.74%;计算AES型换热器管程最大误差分别为0.35%和6.44%,壳程最大误差分别为-0.44%和1.69%。模型适用于光管构成的单相管壳式换热器。
On the basis of the differential theory,a simplified but accurate model for predicting temperature distribution in single phase shell-and-tube exchanger was proposed.In line with the number of baffles Nb and tube passes n,an exchanger was divided into（Nb＋1） big units and then（Nb＋1）n small subunits,with tube side current flowing through the subunits in series and shell side current through the big elements in parallel.Two examples of BEU and AES heat exchangers were analyzed to demonstrate the application and accuracy of the present model in temperature distribution prediction,compared with the Cell model and HTRI method.The results show that the present model reproduces the temperature distribution given by the HTRI solution on the tube side flow with 0.19% accuracy for the BEU heat exchanger and 0.35% for the AES heat exchanger.While the max.error of the Cell model is 1.74% and 6.44% respectively and the errors of the present model and Cell model on the shell side are-0.44% versus 1.69% for the AES heat exchanger.The present model applies to single phase shell-and-tube heat exchangers with bare tubes.