Experimental Investigation on Two-Phase Flow Pattern of Hydrocarbon Refrigerants in the Shell Side of a Helically Baffled Shell and Tube Heat Exchanger

Yang Guocheng; Zheng Bangren; Ding Guoliang; Chen Jie

doi:10.12465/j.issn.0253-4339.2025.01.101

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Experimental Investigation on Two-Phase Flow Pattern of Hydrocarbon Refrigerants in the Shell Side of a Helically Baffled Shell and Tube Heat Exchanger

更新时间：2025-01-23

- Experimental Investigation on Two-Phase Flow Pattern of Hydrocarbon Refrigerants in the Shell Side of a Helically Baffled Shell and Tube Heat Exchanger
- Journal of Refrigeration Vol. 46, Issue 1, Pages: 101-107(2025)
- 作者机构：
  
  1.上海理工大学能源与动力工程学院　上海　 200093
  2.上海交通大学机械与动力工程学院　上海　 200040
  3.中海石油气电集团有限公司　北京　 100028
- 作者简介：
  
  Ding Guoliang, male, professor, School of Mechanical Engineering, Shanghai Jiao Tong University, 86-13386006116, E-mail: glding@sjtu.edu.cn. Research fields: simulation and intelligent control of refrigeration and air conditioning units, thermal management of new energy vehicles and energy storage systems, simulation and optimal design of liquefied natural gas systems.
- 基金信息：
  
  National Natural Science Foundation of China(52104067)
- DOI：10.12465/j.issn.0253-4339.2025.01.101
  CLC： TB61⁺1;TQ051.5
- Received：17 September 2023，
  
  Revised：2023-11-30，
  
  Accepted：12 December 2023，
  
  Published：16 February 2025
- 稿件说明：
移动端阅览
Yang Guocheng, Zheng Bangren, Ding Guoliang, et al. Experimental Investigation on Two-Phase Flow Pattern of Hydrocarbon Refrigerants in the Shell Side of a Helically Baffled Shell and Tube Heat Exchanger[J]. Journal of Refrigeration, 2025, 46(1): 101-107.
DOI：

Yang Guocheng, Zheng Bangren, Ding Guoliang, et al. Experimental Investigation on Two-Phase Flow Pattern of Hydrocarbon Refrigerants in the Shell Side of a Helically Baffled Shell and Tube Heat Exchanger[J]. Journal of Refrigeration, 2025, 46(1): 101-107. DOI： 10.12465/j.issn.0253-4339.2025.01.101.

摘要

碳氢工质在液化天然气用螺旋折流板管壳式换热器壳侧的两相流型决定了换热器的换热性能。通过可视化实验方法测试了丙烷和乙烷/丙烷混合物在螺旋折流板管壳式换热器壳侧的两相流型。测试结果表明：随着干度的增大，实验依次观测到了分层流、分层-雾状流和雾状流3种流型；随着丙烷的质流密度从20 kg/（m

·s）增至40 kg/（m

·s），分层流至分层-雾状流的转化干度从0.7减至0.3，而分层-雾状流至雾状流的转化干度从接近1减至0.7；当乙烷的比例从0增至50%时，分层流至分层-雾状流的转化干度从0.30~0.45增至0.43~0.55，而分层-雾状流至雾状流的转化干度从0.69~0.85增至0.83~接近1。已有的水-空气混合物的流型图无法适用于碳氢工质的流型预测，新建立的流型转化准则对于实验的分层流、分层-雾状流和雾状流的预测偏差分别约为6.5%、5.5%、4.2%。

Abstract

The two-phase flow pattern of hydrocarbon working fluids on the shell side of a helically baffled heat exchanger for liquefied natural gas determines its heat transfer performance. This study tested the two-phase flow patterns of propane and ethane/propane mixtures on the shell side of a helically baffled heat exchanger using a visualization experimental method. The test results demonstrated that with the increase in vapor quality

the experimental observations sequentially included stratified flow

stratified-spray flow

and spray flow; as the mass flux of propane increased from 20 kg/(m

·s) to 40 kg/(m

·s)

the transition vapor quality from stratified flow to stratified-spray flow decreased from 0.7 to 0.3

while the transition vapor quality from stratified-spray flow to spray flow decreased from approximately 1 to 0.7; when the proportion of ethane increased from 0 to 50%

the transition vapor quality from stratified flow to stratified-spray flow increased from 0.30-0.45 to 0.43-0.55

while the transition vapor quality from stratified-spray flow to spray flow increased from 0.69-0.85 to 0.83-close to 1. The existing flow pattern map for water-air mixtures was inadequate for predicting the flow patterns of hydrocarbon working fluids. A new set of flow pattern transition criteria was established with prediction deviations of approximately 6.5%

5.5%

and 4.2% for the experimental stratified flow

stratified-spray flow

and spray flow

respectively.

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references

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