椭圆管连续螺旋折流板换热器壳侧性能评价及三场协同分析

doi:10.3969/j.issn.0438-1157.2013.04.002

化工学报 ›› 2013, Vol. 64 ›› Issue (4): 1145-1150.DOI: 10.3969/j.issn.0438-1157.2013.04.002

椭圆管连续螺旋折流板换热器壳侧性能评价及三场协同分析

杜文静, 王红福, 袁晓豆, 程林

山东大学热科学与工程研究中心,山东济南 250061

收稿日期:2012-07-04 修回日期:2012-08-17 出版日期:2013-04-05 发布日期:2013-04-05
通讯作者: 程林
作者简介:杜文静(1977—),女,副教授。
基金资助:
国家自然科学基金项目(51106090)。

Evaluation of shell side performance and analysis on continuous helical baffled heat exchangers with elliptical tubes

DU Wenjing, WANG Hongfu, YUAN Xiaodou, CHENG Lin

Center of Thermal Science and Technology, Shandong University, Jinan 250061, Shandong, China

Received:2012-07-04 Revised:2012-08-17 Online:2013-04-05 Published:2013-04-05
Supported by:
supported by the National Natural Science Foundation of China(51106090).

摘要/Abstract

摘要： 提出了一种新型的椭圆管连续螺旋折流板换热器。利用ANSYS CFX软件对壳侧流动与传热进行了数值模拟,并采用性能评价图及三场协同原理分析其壳侧性能。结果表明:在研究范围内,以椭圆管替代传统圆管管束后,在维持传热面积基本不变的前提下,壳侧压降降低72%～80%,综合换热性能提高32%～40%。应用性能评价图分析发现椭圆管在强化换热的同时也大大减小了压降。这是由于在相同的速度场与温度场协同前提下,椭圆管使速度场与压力场更好地协同,实现高效低阻强化传热的目的。

关键词: 连续螺旋折流板, 椭圆管, 三场协同, 换热器

Abstract: A novel continuous helical baffled heat exchanger with elliptical tubes was proposed.Numerical simulation was used to obtain shell side flow and transfer performance with ANSYS CFX.The shell-side performance was further analyzed based on the performance evaluation criterion diagram and the three-field synergy principle.Results show that in the heat exchanger, its shell-side pressure drop is reduced by 72%—80% and comprehensive heat transfer performance is improved 32%—40%, compared with traditional circular tube heat exchangers.Performance evaluation criterion diagram shows that elliptical tubes can enhance heat transfer and reduce flow resistance, since the structure of elliptical tubes brings a better synergy between velocity field and pressure filed with the synergy between velocity field and temperature field, which is favorable for heat transfer enhancement.

Key words: continuous helical baffle, elliptical tubes, three field synergy principle, heat exchanger

中图分类号:

TK124

杜文静, 王红福, 袁晓豆, 程林. 椭圆管连续螺旋折流板换热器壳侧性能评价及三场协同分析[J]. 化工学报, 2013, 64(4): 1145-1150.

DU Wenjing, WANG Hongfu, YUAN Xiaodou, CHENG Lin. Evaluation of shell side performance and analysis on continuous helical baffled heat exchangers with elliptical tubes[J]. CIESC Journal, 2013, 64(4): 1145-1150.

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椭圆管连续螺旋折流板换热器壳侧性能评价及三场协同分析

Evaluation of shell side performance and analysis on continuous helical baffled heat exchangers with elliptical tubes

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