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

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

机构地区：[1]School of Low-carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou,221116,Jiangsu,China [2]Key Laboratory of Thermo-Fluid Science and Engineering,MOE,Xi'an Jiaotong University,Xi'an,710049,Shaanxi,China [3]Xi'an Aerospace Propulsion Test Technology Institute,Xi'an,710100,Shaanxi,China

出　　处：《Petroleum Science》2024年第2期1333-1345,共13页石油科学（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.51806236,No.51806239);the Fundamental Research Funds for the Central Universities(No.2015XKMS059);Shaanxi Postdoctoral Fund Project(No.2018BSHEDZZ56);Foundation of Key Laboratory of Thermo-Fluid Science and Engineering(Xi'an Jiaotong University),Ministry of Education(No.KLTFSE2017KF01)。

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 characteristics of the SWHE were investigated by adjusting the component ratio and other working conditions. 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.

关 键 词：Spiral-wound heat exchanger Sloshing conditions Two-phase flow MULTI-COMPONENT Heat and mass transfer 

分 类 号：TE965[石油与天然气工程—石油机械设备]