Research on shell-side heat and mass transfer with multi-component in LNG spiral-wound heat exchanger under sloshing conditions

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外文摘要：The spiral-wound heat exchanger(SWHE)is the primary low-temperature heat exchanger for large-scale LNG plants due to its high-pressure resistance,compact structure,and high heat exchange efficiency.This paper studied the shell-side heat and mass transfer characteristics of vapor-liquid two-phase mixed refrigerants in an SWHE by combining a multi-component model in FLUENT software with a customized multicomponent mass transfer model.Besides,the mathematical model under the sloshing condition was obtained through mathematical derivation,and the corresponding UDF code was loaded into FLUENT as the momentum source term.The results under the sloshing conditions were compared with the relevant parameters under the steady-state condition.The shell-side heat and mass transfer char-acteristics of the SWHE were investigated by adjusting the component ratio and other working condi-tions.It was found that the sloshing conditions enhance the heat transfer performance and sometimes have insignificant effects.The sloshing condition is beneficial to reduce the flow resistance.The comprehensive performance of multi-component refrigerants has been improved and the improvement is more significant under sloshing conditions,considering both the heat transfer and pressure drop.These results will provide theoretical support for the research and design of multi-component heat and mass transfer enhancement of LNG SWHE under ocean sloshing conditions.

外文关键词：

Spiral-wound heat exchangerSloshing conditionsTwo-phase flowMulti-componentHeat and mass transfer

作者：

Xue-Ping Du、Guang-Lei Yu、Ya-Cheng Xu、Zhi-Jie Chen、Nai-Liang Li、Huan-Guang Wang

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作者单位：

School of Low-carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou,221116,Jiangsu,China

Key Laboratory of Thermo-Fluid Science and Engineering,MOE,Xi'an Jiaotong University,Xi'an,710049,Shaanxi,China

Xi'an Aerospace Propulsion Test Technology Institute,Xi'an,710100,Shaanxi,China

School of Low-carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China

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基金：

国家自然科学基金国家自然科学基金中央高校基本科研业务费专项Shaanxi Postdoctoral Fund ProjectFoundation of Key Laboratory of Thermo-Fluid Science and Engineering(Xi'an Jiaotong University),Ministry of Education

项目编号：

51806236518062392015XKMS0592018BSHEDZZ56KLTFSE2017KF01

出版年：

2024

DOI：

10.1016/j.petsci.2023.10.016

石油科学(英文版)

中国石油大学（北京）

石油科学(英文版)

影响因子：0.88

ISSN：1672-5107

年,卷(期)：2024.21(2)