Özet:

Three-dimensional numerical analysis was made with the help of ANSYS-FLUENT of the proton-transmitting membrane fuel battery (PEMFC) consisting of a single cell using two different sizes of MEC (Membran Electrot Couple). Numerical analysis of the PEM fuel battery prepared with two different thicknesses is done in different working conditions. The diffusion layer, the catalyst layer and membrane thickness are determined at 0.400 mm, 0.005 mm and 0.035 mm respectively. These thicknesses for the second MEC are 0.300 mm, 0.050 mm. And it was accepted as 0.125 mm and numerous solutions were taken. The polarization curves are compared with the polarization curves. The solutions obtained for MEC-1 with a thick catalytic layer can be seen in the polarization curve, where concentration losses occur. The current intensity values obtained from the solution of the fuel battery model prepared with MEÇ-1 were better than the condition prepared with MEÇ-2. The impact on the flow intensity of the work pressure for the PEM fuel battery model has been analyzed using the MEC (MEC-1 and MEC-2) of these two different thicknesses. Work pressure is determined as 150 kPa, 200 kPa, 300 kPa and 400 kPa, and polarization curves for each pressure value are presented in graphs within both MEI. To solve this problem, the preservation of the mass, momentum, energy, types and phase potential has been considered. The ANSYS FLUENT PEMFC module solves the electrochemical equations within the fuel battery depending on hydrogen oxidation and oxygen decrease rate. Results related to the mass distribution of hydrogen and oxygen are presented in two-dimensional direction in the direction of the main gas flow. Also, hydrogen’s mass shrinking changes have been studied in two dimensions with the distribution taken in straight shrinkings (input, middle and output) to the main flow.

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