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Three Dimensional Computational Modeling of Multiphase Flow in Proton Exchange Membrane Fuel Cells

Arbabi, Faraz | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41545 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Mazaheri, Karim; Roshandel, Ramin
  7. Abstract:
  8. Proton exchange membrane (PEM) fuel cell performance is directly related to the flow channel design on bipolar plates. Power gains can be found by varying the type, size, or arrangement of channels. It has been understood that the flow field design has deterministic role on mass transport and water management in a PEM Fuel cell. This study concentrates on improvements in the fuel cell performance through optimization of channel dimensions and configurations. A 3D, multi-component numerical model of flow distribution based on the Navier-Stokes equations using individual computer code is presented. The simulation results showed excellent agreement with the experimental results in previous works. In this paper, a new bipolar plate design based on bio inspired pattern is presented and analyzed. The main design aspects in this research are based on more uniform velocity distribution and more homogenous molar spreading of species along the flow channels and also higher voltage and power density output for a fixed current density. By developing a numerical code it was found that the velocity field is much more uniform in new channels design, the achieved reactants distribution in the gas diffusion layer and also over the electrolyte surface is very more homogeneous, moreover the produced power density is higher than parallel and serpentine flow channels up to 56 and 26 percent respectively
  9. Keywords:
  10. Proton Exchange Membrane (PEM)Fuel Cell ; Three Dimensional Modeling ; Computational Fluid Dynamics (CFD) ; Polarization Curve ; Bipolar Plates ; Fluid Channel

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