Title page for 93323119


[Back to Results | New Search]

Student Number 93323119
Author Chin-Tsun Wang(王鏡淳)
Author's Email Address No Public.
Statistics This thesis had been viewed 1247 times. Download 997 times.
Department Mechanical Engineering
Year 2005
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title 水在蛇型流道之行為探討
Date of Defense 2006-07-20
Page Count 54
Keyword
  • PEM fuel cell
  • water behavior
  • water management
  • Abstract ABSTRACT
    This article discussed the water behavior in serpentine channel for proton exchange membrane fuel cell cathode and inlet velocity effect for water removing without considering chemical reaction.
    Using three different inlet velocities, this article discussed the water behavior in channel for less and larger water generation, and compared with the original model about the water removal by using partially blocked channel and gradually decreased area in part of channel. The factor of water removal in changing the fluid channel would be also discussed.
    This article pointed out that water would be moved by viscous force, inertia force, and shear stress which were provided by the air. Water would spread along two sides of channel because the air velocity would be fully developed gradually. For less water generation, this article only discussed three different inlet air velocity influences so that water removal by increasing air velocity was unknown. For larger water generation, with faster air inlet velocity, the water removal efficiency would be better. Changing the fluid channel made particle water accumulate in corner and in location of blocked channel which would cause the worse effect of water removal.
    Table of Content 目錄
    中文摘要…………………………………………………………………Ⅰ
    英文摘要………………………………………………………………Ⅱ
    目錄………………………………………………………………………Ⅲ
    圖目錄……………………………………………………………………Ⅴ
    符號說明…………………………………………………………………Ⅷ
    第一章 序論……………………………………………………………1
    1.1 前言………………………………………………………1
    1.2 燃料電池工作原理………………………………………2
    1.3 質子交換膜燃料電池之構造與運作原理………………3
    1.4 文獻回顧…………………………………………………4
    1.5 研究動機與目的…………………………………………8
    第二章 理論模式………………………………………………………9
    2.1 物理模型與基本假設……………………………………9
    2.2 統御方程式……………………………………………10
    2.2.1 VOF模組…....…………………………………..10
    2.2.2 The Volume Fraction Equation…………………..10
    2.2.3 動量方程式....……………………………….…..11
    2.3 邊界設定………………………………………………12
    2.3.1 出入口邊界.....…………………………………..12
    2.3.2 壁面邊界…………………………………….…..12
    2.4 水的初始設定……………………………………………14
    第三章 數值方法………………………………………………………15
         3.1 使用軟體………………………………………………15
    3.1.1 Gambit模組…....………………………………..15
    3.1.2 Fluent模組…………………..…………………..15
         3.2 格點設定………………………………………………… 16
         3.3 計算流程…….……………………………………………16
    第四章 結果與討論……………………………………………………18
         4.1小水滴運動模式分析………………………………….…18
         4.2大水滴運動模式分析…...…………………………………20
         4.3更改流道設計………………………………...……………22
    4.3.1 流道中間加擋板..………………...……………..22
    4.3.2 流道漸縮…………………….…………………..24
    第五章 結論……………………………………………………………26
    參考文獻…………………………………………………………………27
    Reference 參考文獻
    1 G. J. M. Janssen and M. L. J. Overvelde, “Water transport in the porton-exchange-membrane fuel cell: measurement of the effective drag coefficient,” Journal of Power Sources, Vol. 101, 2001, pp. 117-125.
    2 T. E. Springer, T. A. Zawodzinski and S. Gottesfeld, “Polymer electrolyte fuel cell model,” Journal of Electrochemical Society, Vol. 38, No.8, 1991, pp. 2334-2342.
    3 G. H. Guvelioglu and H. G. Stenger, “Computational fluid dynamics modeling of polymer electrolyte membrane fuel cells,” Journal of Power Sources, Vol. 147, 2005, pp. 95-106.
    4 D. Singh, D. M. Lu,and N. Djilali, ”A two-dimensional analysis of mass transport in proton exchange membrane fuel cells,” International Journal of Engineering Science, Vol. 37, 1998, pp. 431-452.
    5 X. Li and I. Sabir, “Review of bipolar plates in PEM fuel cells: Flow-field designs,” International Journal of Hydrogen Energy, Vol. 30, 2005, pp. 359-371.
    6 T. V. Nguyen, “A gas distributor design for porton exchange membrane fuel cells,” Journal of Electrochemical Society, Vol. 143, No.5 1996, L103-L105.
    7 A. C. West and T. F. Fuller, “Influence of rib spacing in proton-exchange membrane electrode assemblies,” Journal of Applied Electrochemistry, Vol. 26, 1996, pp. 557-565.
    8 C. Y. Soong, W. M. Yan, C. Y. Tseng, H. C. Liu, F. L. Chen, and H. S. Chu, “Analysis of reactant gas transport in a PEM fuel cell with partially blocked fuel flow channels,” Journal of Power Sources, Vol. 143, 2005, pp. 36-47.
    9 J. Scholta, G. Escher, W. Zhang, L. Kuppers, L. Jorisseen, and W. Lehnert,“Investigation on the influence of channel geometries on PEMFC performance,” Journal of power sources, Vol. 155, 2006, pp. 66-71.
    10 A. Su, F. B. Weng, C. Y. Hsu, and Y. M. Chen, “Studies on flooding in PEM fuel cell cathode channels,” Internatioal Journal of Hydrogen Energy, Vol. 31, 2006, pp. 1031-1039.
    11 D. S. Litster and N. Djilali, “Ex Situ visualization of liquid water transport in PEM fuel cell gas diffusion layers,” Journal of Power Sources, Vol. 154, 2006, pp. 95-105.
    12 C. Y. Wang and P. Cheng, ”A multiphase mixture model for multiphase multicomponent transport in capillary porous media I., model development,” International Journal of Heat Mass Transfer, Vol. 39, No. 17, 1996, pp. 3607-3618.
    13 C. Y. Wang and P. Cheng, ”A multiphase mixture model for multiphase multicomponent transport in capillary porous media II., Numerical simulation of the transport of organic compounds in the subsurface,” International Journal of Heat Mass Transfer, Vol. 39, No. 17, 1996, pp. 3619-3632.
    14 C. Y. Wang, “Two-phase flow and transport,” Handbook of Fuel Cells-Fundamentals, Technology and Applications Vol. 3, 2003, John Wiley & Sons.
    15 P. Quan, B. Zhou, A. Sobiesiak, and Z. Liu, “Water behavior in Serpentine micro-channel for proton exchange membrane fuel cell cathode,” Journal of Power Sources, Vol. 152, 2005, pp. 131-145.
    16 K. Jiao, B. Zhou, and P. Quan, “Liquid water transport in parallel serpentine channel with manifold on cathode side of a PEM fuel cell stack,” Journal of Power Sources, Vol. 154, 2006, pp. 124-137.
    17 C. W. Hirt, and B. D. Nichols, “Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries,” Journal of Computional Physics, Vol. 39, 1981, pp. 201-225.
    18 FLUENT 6.1.22 User's Guide.
    19 P. R. Gunjal, V. V. Ranade, and R. V. Chaudhar, “Dynamic of Drop impact on Solid Surface: Experiments and VOF Simulations,” AIChE Journal, Vol. 51, No.1, 2005, pp. 59-78.
    20 J. U. Brackbill, D. B. Kothe, and C. Zemach, “ A Comtinuum Method for Modeling Surface Tension,” Journal of Computional Physics, Vol. 100, 1992, pp. 335-354.
    Advisor
  • Lih-Wu Hourng(洪勵吾)
  • Files
  • 93323119.pdf
  • approve immediately
    Date of Submission 2006-07-25

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have dissertation-related questions, please contact with the NCU library extension service section.
    Our service phone is (03)422-7151 Ext. 57407,E-mail is also welcomed.