![]() The EGR decreases with decreasing wavelength or increasing amplitude.Ĭommon for tree-shaped, space-filling flow-field plates in polymer electrolyte fuel cells is their ability to distribute reactants uniformly across the membrane area, thereby avoiding excess concentration polarization or entropy production at the electrodes. The entropy generation ratio (EGR) evaluates the performances of different wavy channels based on the accurate description of oxygen transport in PEMFC without calculating the associated pumping power consumption rates. The entropy generation rates increase more significantly at small wavelengths and large amplitudes. The wavy channels would increase the oxygen concentration gradient and the viscous friction, increasing entropy generation. The enhancement of current density peaks at an amplitude of 0.4 mm and a wavelength of 2 mm, increased by 10.40% compared to the non-wavy design. Amplitude and wavelength significantly influence oxygen transport, friction resistance, and current densities in PEMFC operations. Two geometrical parameters, amplitude and wavelength, of the structure of the wavy-flow field in a proton exchange membrane fuel cell (PEMFC) were investigated on their impacts on cell performances via a three-dimensional, multiphase, and non-isothermal model. ![]()
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