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    徐士鸣

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:能源与动力学院
    • 学科:制冷及低温工程. 热能工程. 工程热物理
    • 办公地点:能动大楼826
    • 联系方式:13050539216
    • 电子邮箱:xsming@dlut.edu.cn

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    Numerical simulation of flow and mass transfer in profiled membrane channels for reverse electrodialysis

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    论文类型:期刊论文

    发表时间:2021-12-15

    发表刊物:CHEMICAL ENGINEERING RESEARCH & DESIGN

    卷号:157

    页面范围:77-91

    ISSN号:0263-8762

    关键字:Computational fluid dynamics; Profiled membranes; Mass transfer; Mixing promoter; Reverse electrodialysis

    摘要:Profiled membranes, the membranes with microstructures on one side or two sides, are expected to be a viable alternative to the spacers and enhance the power output of the reverse electrodialysis (RED) process. However, there are some problems for the present single-sided profiled membranes such as flow stagnating and insufficient fluid mixing. As for double-sided profiled membranes, the membrane preparation and exact stack assembling are still difficult. With respect to these problems, a single-sided wave-profiled membrane with wavy sub-corrugations as additional mixing promoters is proposed in this study. Based on the Computational Fluid Dynamics method, the flow and mass transfer characteristics in the wave-profiled membrane channel and several other channels (for purposes of comparison) are simulated. Results show that the single-sided wave-profiled membrane channel has more advantages than the single-sided pillar-profiled membrane channels especially at low Reynolds numbers typically used in RED applications, although its performance is still inferior to that of the double-sided chevron-profiled membrane channel and woven spacer channel. Furthermore, it can be proved that the wavy sub-corrugations can enhance the mass transfer and reduce the concentration polarization, while they have a better influence on the surface where the sub-corrugations are located. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.