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Chemcial Industry and Engineering 2019, Vol. 36 Issue (3) :72-79    DOI: 10.13353/j.issn.1004.9533.20181017
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Numerical Simulation of Shell-Side Falling Film Boiling of LNG Spiral Wound Heat Exchanger
Wu Zhiyong1, Liu Yang1, Jian Weiwei1, Gao Yang1, Cai Weihua2
1. College of Petroleum Engineering, Liaoning Shihua University, Liaoning Fushun 113001, China;
2. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

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Abstract The volume of fluid (VOF) model which attaches to the ANSYS Fluent software was employed to simulate the shell-side falling film boiling of spiral wound heat exchanger (SWHE). When inlet quality in shell-side is not more than 0.10, the shell-side boiling can be well simulated by the VOF model, and the boiling heat transfer coefficient that is related to refrigerant mass velocity may be accurately predicted. For falling film flow, the vapor velocity and the liquid velocity are so low that friction pressure drop is small. The heated wall is generally covered by the liquid film, the liquid phase will turn into the vapor phase, separate from the heated wall and enter into the flow channel of shell-side after the tube-side heat is absorbed. Besides the refrigerant flowing down which is dominant on the shell-side, the spiral flowing which is minor can be found, and the vapor eddy which stays at the top of shell-side may be identified.
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Articles by authors
Wu Zhiyong
Liu Yang
Jian Weiwei
Gao Yang
Cai Weihua
KeywordsVOF model;   falling film flow;   boiling heat transfer;   velocity distribution;   vapor volume fraction     
Received 2018-04-02;
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Wu Zhiyong, Liu Yang, Jian Weiwei, Gao Yang, Cai Weihua.Numerical Simulation of Shell-Side Falling Film Boiling of LNG Spiral Wound Heat Exchanger[J]  Chemcial Industry and Engineering, 2019,V36(3): 72-79
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