Heat Transfer Characteristic of Elliptical Section Spiral Copper Tube Heat Exchanger

JI Jiadong; DENG Ruyi; LU Yu; ZHANG Jingwei; LI Feiyang

doi:10.7652/xjtuxb202306014

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Heat Transfer Characteristic of Elliptical Section Spiral Copper Tube Heat Exchanger

更新时间：2025-05-08

- Heat Transfer Characteristic of Elliptical Section Spiral Copper Tube Heat Exchanger
- Vol. 57, Issue 6, Pages: 123-132(2023)
- 作者机构：
  
  1. 安徽理工大学机械工程学院,安徽,淮南,232001
  2. 安徽理工大学人工智能学院,安徽,淮南,232001
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202306014
  CLC： TH123;TK172
- Online First：10 June 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
JI Jiadong, DENG Ruyi, LU Yu, et al. Heat Transfer Characteristic of Elliptical Section Spiral Copper Tube Heat Exchanger[J]. 2023, 57(6): 123-132.
DOI：

JI Jiadong, DENG Ruyi, LU Yu, et al. Heat Transfer Characteristic of Elliptical Section Spiral Copper Tube Heat Exchanger[J]. 2023, 57(6): 123-132. DOI： 10.7652/xjtuxb202306014.

摘要

为了得到具有更高传热特性的换热装置

在椭圆截面螺旋铜管(ESSCT)换热器内安装螺旋折流板和中空管

对其进行了结构改进。采用双向流固耦合计算法

研究了不同入口流速和不同ESSCT截面横纵向半径比(e)条件下

改进后ESSCT换热器的振动强化传热特性。研究表明

可将传热元件由传统的圆形截面变为椭圆形截面来获得具有更高传热性能的换热设备。当截面为椭圆形(e≠1)时

ESSCT的传热性能获得了不同层次的改善。尤其当e=2时

ESSCT的传热性能获得了最大幅度的提高

此时换热器综合强化传热性能最强。ESSCT的平均面均传热系数(SAHTC)和强化传热评价指标(E

pec

)及其增幅均随入口流速增加而增大。此外

单位压降下的SAHTC在低流速时效果更明显

其随入口流速的增加而减小。研究结果对新型ESSCT换热器设计应具有一定的指导意义。

Abstract

To obtain the heat exchanger with higher heat transfer efficiency

the structure of the elliptical section spiral copper tube(ESSCT)heat exchanger was improved by installing spiral baffle and hollow tube. The vibration enhanced heat transfer characteristics of the improved ESSCT heat exchanger under different inlet flow velocity and different ratio of transverse and longitudinal radius(e)were studied by using two-way fluid structure coupling calculation method. The study showed that the heat exchanger can reach a higher heat transfer efficiency by using the heat transfer element with an elliptical section instead of

a conventional round section. When the section is elliptical(e≠1)

the heat transfer performance of the ESSCT was improved in varying degrees. Especially

when e=2

it is enhanced to the greatest extent

and at the same time

the integrated enhanced heat transfer performance of the heat exchanger is the optimal. The mean surface average heat transfer coefficient(SAHTC)and the performance evaluation criteria(E

pec

)of the ESSCT increased with the increase of inlet flow velocity. In addition

the SAHTC under unit pressure drop was more effective at low flow rate

which decreased with the increase of inlet flow velocity. The results in this paper can provide some guidance for the design of the new ESSCT heat exchanger.

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references

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