Enhancing the performance of polymer electrolyte membrane fuel cell by optimizing the operating parameter

  • Nima AhmadiEmail author
  • Sadra Rostami
Technical Paper


In present paper it is tried to concentrate to the configurations of gas channels and gas diffusion layers influences on the performance of polymer electrolyte membrane fuel cell. At first, increasing the number of channels is considered and observed such that the best results are gained with the case of three channels. Afterward, effect of prominent GDLs is studied. The prominences size is one of the main parameters which affect the performance. For this purpose, radius (R) of prominences is grown gradually. The optimal performance is obtained in the case of R = 0.45. In addition, the inlet velocity of gas flow is surveyed. The results indicate that when the inlet velocity of gases is set about 0.2 m s−1, the species diffusion is optimized. Also, the height of channels is investigated to find out the optimal channel height. It is found that the highest performance is achieved in channel height about h = 1 mm and R = 0.45 mm.


Gas diffusion layer Numerical simulation Geometrical configuration Prominence 

List of symbols


Concentration of species (mol m−3)


Mass diffusion coefficient (m2 s−1)


Local current density (A cm−2)


Permeability (m2)


Electro-osmotic drag coefficient


Pressure (Pa)


Temperature (K)


Velocity vector


Anode or cathode


Volume (m3)

Greek letter


Density (kg m−3)


Effective porosity


Electrolyte phase potential (varies from − 1 to 1) (V)


Viscosity (kg m−1 s−1)


Protonic conductivity (1 ohm−1 m−1)


Membrane ionic conductivity (S m−1)

Subscripts and superscripts


Gas channel length


Gas channel height




Bipolar plate


Prominence radius


Membrane electrolyte assembly


Gas diffusion layer


Cathode over potential


Anode over potential


Prominences aspect ratio compared to channel


Reynolds number


Liquid phase


Gas phase



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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.Department of Mechanical Engineering, Faculty of Shaheed BeheshtiTechnical and Vocational University (TVU)UrmiaIran
  2. 2.Faculty of Mechanical EngineeringUrmia University of TechnologyUrmiaIran

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