بهبود توزیع جریان گاز در توده پیل‌سوختی پلیمری با خروج آب مایع از منیفولد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مهندسی مکانیک، دانشگاه فردوسی مشهد، مشهد، ایران

2 مهندسی مکانیک، دانشگاه صنعتی مالک اشتر، تهران، ایران

چکیده

در این مقاله، توزیع جریان اکسیژن در یک توده پیل‌سوختی پلیمری به صورت عددی مورد مطالعه قرار گرفت. در ابتدا توده به‌صورت تکفاز شبیه‌سازی شده و نقش کاهش تدریجی ارتفاع منیفولد (منیفولد ذوزنقه‌ای) بر بهبود توزیع جریان میان سلول‌های سوختی بررسی گردید. از انحراف معیار و ضریب غیریکنواختی برای اندازه‌گیری بدتوزیعی جریان استفاده شده است. کاهش تدریجی ارتفاع منیفولد تا 70 درصد در منیفولد ذوزنقه‌ای، موجب بهبود 9/6 و 4/8 درصدی انحراف معیار استاندارد و ضریب غیریکنواختی گردید. نتایج شبیه‌سازی دوفازی نشان داد که چگالش بخارآب موجود در اکسیژن اشباع می‌تواند باعث تجمع آب مایع در انتهای منیفولد شود. با گذشت زمان و بهم پیوستن قطرات کوچک‌تر، شعاع قطره تشکیل شده در انتهای منیفولد افزایش یافته تا زمانی که از دیوار منیفولد جدا شده و وارد سلول‌های انتهایی گردد. در منیفولد ذوزنقه‌ای، آب مایع با مقدار کمتر و فواصل زمانی کوتاه‌تر وارد سلول انتهایی می‌گردد. پیشنهاد گردید با ایجاد محفظه‌ای در انتهای منیفولد، آب مایع جمع آوری شده و از توده تخلیه گردد. ورود مقداری گاز اضافه به منیفولد و خروج آن از محفظه جمع‌آوری آب می‌تواند باعث هدایت آب مایع به درون محفظه گردد بدون اینکه تغییرات محسوسی در افت فشار ایجاد کند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Improving the gas flow distribution in a PEMFC stack by removing liquid water from the manifold

نویسندگان [English]

  • Ahmad Rezaei Sangtabi 1
  • Ali Kianifar 1
  • Ebrahim Alizadeh 2
1 Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.
2 Department of Mechanical Engineering, Malek Ashtar university of Technology, Tehran, Iran.
چکیده [English]

This paper studied the oxygen flow distribution in a PEM fuel cell stack numerically. At first, the flow in the stack was simulated as a single phase, and the effect of gradual reduction of manifold height (tapered manifold) on improving the flow distribution between fuel cells was investigated. Standard deviation and non-uniformity coefficient have been used to measure the flow maldistribution. Gradual reduction of manifold height up to 70% in the tapered manifold improved standard deviation and non-uniformity coefficient by 6.9% and 8.4%, respectively. The results of the two-phase simulation showed that the condensation of water vapor in the saturated oxygen could cause the accumulation of liquid water at the end of the manifold. As the smaller droplets merged, the droplet radius formed at the end of the manifold increased until it detached from the manifold wall and entered the last cells. Less liquid water entered the last cell at shorter intervals in the tapered manifold. It was suggested that by creating a water chamber at the end of the manifold, condensed water be collected from the manifold and discharged from the stack. Increasing the mass flow at the manifold inlet and discharging the excess gas through the water collection chamber can push the liquid water into the chamber without causing significant changes in pressure drop.

کلیدواژه‌ها [English]

  • Flow distribution
  • PEM fuel cell
  • Two-phase Flow
  • Water removal
  • Manifold

مراجع

  1. Barbir, F., "PEM Fuel Cells", Academic Press, (2013).
  2. Mench, M.M., "Introduction to Fuel Cells: Fuel Cell Engines, Hoboken", John and Wiley Sons Press, (2008).
  3. Yu, X., Zhang, C., Fan, M., Deng, B., Huang, C., Xu, J., Liu, D. and Jiang, S., "Experimental study of dynamic performance of defective cell within a PEMFC stack", International Journal of Hydrogen Energy, Vol. 47, No. 13, Pp. 8480–8491, (2022).
  4. Wang, J., Yan, J., Yuan, J. and Sundén, B., "On Flow Maldistribution in PEMFC Stacks", International Journal of Green Energy, Vol. 8, No. 5, Pp.585–606, (2011).
  5. Rashidi, S., Karimi, N., Sunden, B., Kim, K.C., Olabi, A.G. and Mahian, O., "Progress and challenges on the thermal management of electrochemical energy conversion and storage technologies: Fuel cells, electrolysers, and supercapacitors", Progress in Energy and Combustion Science, Vol. 88, Pp. 966-1011, (2022).
  6. Guo, H., Zhao, Q. and Ye, F., "An experimental study on gas and liquid two-phase flow in orientated-type flow channels of proton exchange membrane fuel cells by using a side-view method", Renewable Energy, Vol. 188, Pp. 603–18, (2022).
  7. Huang, H., Liu, M., Li, X., Guo, X., Wang, T., Li, S. and et al., "Numerical simulation and visualization study of a new tapered-slope serpentine flow field in proton exchange membrane fuel cell". Energy, Vol. 246, 123406, (2022).
  8. Kim, S.Y. and Kim, W.N., "Effect of cathode inlet manifold configuration on performance of 10-cell proton-exchange membrane fuel cell", Journal of Power Sources, Vol. 166, No. 2, Pp. 430-434, (2007).
  9. Lebæk J., Bang M. and Kær S.K., "Flow and Pressure Distribution in Fuel Cell Manifolds", Journal of Fuel Cell Science and Technology, Vol. 7, No. 6, 61001, (2010).
  10. Sajid, H.M., Shabani, B. and Cheung, C.P., "Enhanced gas flow uniformity across parallel channel cathode flow field of Proton Exchange Membrane fuel cells", International Journal of Hydrogen Energy, Vol. 42, No. 8, Pp. 5272-5283, (2017).
  11. Koh, J.H., Seo, H.K., Lee, C.G., Yoo, Y.S., and Lim, H.C., "Pressure and flow distribution in internal gas manifolds of a fuel-cell stack", Journal of Power Sources, Vol. 115, No. 1, Pp. 54-65, (2003).
  12. Park, J. and Li, X., "Effect of flow and temperature distribution on the performance of a PEM fuel cell stack", Journal of Power Sources, Vol. 162, No. 1, Pp. 444-459, (2006).
  13. Karimi, G., Baschuk, J.J. and Li, X., "Performance analysis and optimization of PEM fuel cell stacks using flow network approach", Journal of Power Sources, Vol. 147, No. 2, Pp. 162-177, (2005).
  14. Qin, Y., Liu, G., Chang, Y. and Du, Q., "Modeling and design of PEM fuel cell stack based on a flow network method", Applied Thermal Engineering, Vol. 144, Pp. 411-423, (2018).
  15. Mustata, R., Valiño, L., Barreras, F., Gil, M.I. and Lozano, A., "Study of the distribution of air flow in a proton exchange membrane fuel cell stack", Journal of Power Sources, Vol. 192, No. 1, Pp. 185-189, (2009).
  16. Chen, C.H., Jung, S.P. and Yen, S.C., "Flow distribution in the manifold of PEM fuel cell stack", Journal of Power Sources, Vol. 173, No. 1, Pp. 249-263, (2007).
  17. Su, G., Yang, D., Xiao, Q., Dai, H. and Zhang, C., "Effects of vortexes in feed header on air flow distribution of PEMFC stack: CFD simulation and optimization for better uniformity", Renewable Energy, Vol. 173, Pp. 498-506, (2021).
  18. Jackson, J.M., Hupert, M.L. and Soper, S.A., "Discrete geometry optimization for reducing flow non-uniformity, asymmetry, and parasitic minor loss pressure drops in Z-type configurations of fuel cells", Journal of Power Sources, Vol. 269, Pp. 274-283, (2014).
  19. Lim, B.H., Majlan, E.H., Daud, W.R.W., Rosli, M.I. and Husaini, T., "Numerical analysis of flow distribution behavior in a proton exchange membrane fuel cell", Heliyon, Vol. 4, No. 10, Pp. 845-856, (2018).
  20. Tsukamoto, T., Aoki, T., Kanesaka, H., Taniguchi, T., Takayama, T., Motegi, H. and et al., "Three-dimensional numerical simulation of full-scale proton exchange membrane fuel cells at high current densities", Journal of Power Sources, Vol. 488, 229412, (2021).
  21. Chen, X., Fang, Y., Liu, Q., He, L., Zhao, Y., Huang, T and et al., "Temperature and voltage dynamic control of PEMFC Stack using MPC method", Energy Reports, Vol. 8, Pp. 798-808, (2022).
  22. Yan, W.M., Lee, C.Y., Li, C.H., Li, W.K. and Rashidi, S., "Study on heat and mass transfer of a planar membrane humidifier for PEM fuel cell", International Journal of Heat and Mass Transfer, Vol. 152, 1195388, (2020).
  23. Wilberforce, T., Ijaodola, O., Khatib, F.N., Ogungbemi, E.O., El-Hassan, Z., Thompson, J. and et al., "Effect of humidification of reactive gases on the performance of a proton exchange membrane fuel cell". Science of the Total Environment, Vol. 688, Pp. 1016-1035, (2019).
  24. Lebæk, J., Andreasen, M.B., Andresen, H.A., Bang, M. and Kær, S.K., "Particle Image Velocimetry and Computational Fluid Dynamics Analysis of Fuel Cell Manifold", Journal of Fuel Cell Science and Technology, Vol. 7, No. 3, 31001, (2010).
  25. Chen, W.H., Tsai, L., Chang, M.H., You, S. and Kuo, P.C., "Geometry optimization and pressure analysis of a proton exchange membrane fuel cell stack", International Journal of Hydrogen Energy, Vol. 46, No. 31, Pp. 16717-16733, (2021).
  26. Huang, F., Qiu, D., Lan, S., Yi, P. and Peng, L., "Performance evaluation of commercial-size proton exchange membrane fuel cell stacks considering air flow distribution in the manifold", Energy Conversion and Management, Vol. 203, 112256, (2020).
  27. Brackbill, J., Kothe, D. and Zemach, C., "A continuum method for modeling surface tension", Journal of Computational Physics, Vol. 100, No. 2, Pp. 335-354, (1992).
  28. Sangtabi, A.R., Kianifar, A. and Alizadeh, E., "Effect of water vapor condensation on the flow distribution in a PEM fuel cell stack", International Journal of Heat and Mass Transfer, Vol. 151, 119471, (2020).
  29. Ryu, J.B., Jung, C.Y. and Yi, S.C., "Three-dimensional simulation of humid-air dryer using computational fluid dynamics", Journal of Industrial and Engineering Chemistry, Vol. 19, No. 4, Pp. 1092-1098, (2013).
  30. Famileh, I.Z., Esfahani, J.A. and Vafai, K., "Effect of nanoparticles on condensation of humid air in vertical channels", International Journal of Thermal Sciences, Vol. 112, Pp. 470-483, (2017).
  31. Jithesh, P.K., Bansode, A.S., Sundararajan, T. and Das S.K., "The effect of flow distributors on the liquid water distribution and performance of a PEM fuel cell", International Journal of Hydrogen Energy, Vol. 37, No. 22, Pp. 17158-17171, (2012).
  32. Hirt, C. and Nichols, B., "Volume of fluid (VOF) method for the dynamics of free boundaries", Journal of Computational Physics, Vol. 39, Vol. 1, Pp. 201-225, (1981).
  33. Samkhaniani, N. and Ansari, M.R., "Numerical simulation of bubble condensation using CF-VOF", Progress in Nuclear Energy, Vol. 89, Pp. 120-131, (2016).
  34. Marschall, H., Hinterberger, K., Schüler, C., Habla, F. and Hinrichsen, O., "Numerical simulation of species transfer across fluid interfaces in free-surface flows using OpenFOAM", Chemical Engineering Science, Vol. 78, Pp. 111-127, (2012).
  35. Moran, M.J., Shapiro, H.N., Boettner, D.D. and Bailey, M.B., "Fundamentals of Engineering Thermodynamics", John and Wiley Sons Press, (2014).
  36. Borgnakke, C. and Sonntag, R.E., "Fundementals of Thermodynamics", John and Wiley Sons Press, (2009).
  37. Ding, Y., Bi, H.T. and Wilkinson, D. P., "Three dimensional numerical simulation of gas–liquid two-phase flow patterns in a polymer–electrolyte membrane fuel cells gas flow channel", Journal of Power Sources, Vol. 196, No. 15, Pp. 6284-6292, (2011).
  38. Kim, J.H., Kim, W.T., "Numerical Investigation of Gas-Liquid Two-Phase Flow inside PEMFC Gas Channels with Rectangular and Trapezoidal Cross Sections", Energies, Vol. 11, No. 6; pp. 1403, (2018).
  39. Maharudrayya, S., Jayanti, S. and Deshpande, A.P., "Flow distribution and pressure drop in parallel-channel configurations of planar fuel cells", Journal of Power Sources, Vol. 144, No. 1, Pp. 94-106, (2005).
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