首页|Numerical and experimental study on the falling film flow characteristics with the effect of co-current gas flow in hydrogen liquefaction process

Numerical and experimental study on the falling film flow characteristics with the effect of co-current gas flow in hydrogen liquefaction process

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Liquid hydrogen storage and transportation is an effective method for large-scale transportation and utilization of hydrogen energy.Revealing the flow mechanism of cryogenic working fluid is the key to optimize heat exchanger structure and hydrogen liquefaction process(LH2).The methods of cryogenic visualization experiment,theoretical analysis and numerical simulation are conducted to study the falling film flow characteristics with the effect of co-current gas flow in LH2 spiral wound heat exchanger.The results show that the flow rate of mixed refrigerant has a great influence on liquid film spreading process,falling film flow pattern and heat transfer performance.The liquid film of LH2 mixed refrigerant with column flow pattern can not uniformly and completely cover the tube wall surface.As liquid flow rate increases,the falling film flow pattern evolves into sheet-column flow and sheet flow,and liquid film completely covers the surface of tube wall.With the increase of shear effect of gas-phase mixed refrigerant in the same direction,the liquid film gradually becomes unstable,and the flow pattern eventually evolves into a mist flow.

Hydrogen liquefactionSpiral wound heat exchangerFlow pattern transitionFalling film flow

Chong-Zheng Sun、Yu-Xing Li、Hui Han、Xiao-Yi Geng、Xiao Lu

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College of Energy Storage Technology,Shandong University of Science and Technology,Qingdao 266590,Shandong,China

College of Pipeline and Civil Engineering/Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety,China University of Petroleum,Qingdao 266580,Shandong,China

国家自然科学基金国家自然科学基金山东省自然科学基金Natural Science Foundation of Shandong Province for Innovation and Development Joint Funds中国博士后科学基金

5230406762273213ZR2021QE073ZR2022LZH0012023M732111

2024

10.1016/j.petsci.2023.11.007

石油科学(英文版)
中国石油大学（北京）

石油科学(英文版)

EI
影响因子：0.88
ISSN：1672-5107
年,卷(期)：2024.21(2)
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