Many of the Proton Exchange Membrane Fuel Cell (PEMFC) models proposed in the literature consist of mathematical equations. However, they are not adequately practical for simulating power systems. The proposed model takes into account phenomena such as activation polarization, ohmic polarization, double layer capacitance and mass transport effects present in a PEM fuel cell. Using electrical analogies and a mathematical modeling of PEMFC, the circuit model is established. To evaluate the effectiveness of the circuit model, its static and dynamic performances under load step changes are simulated and compared to the numerical results obtained by solving the mathematical model. Finally, the applicability of our model is demonstrated by simulating a practical system.
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With an aim of optimizing the points of operation of the proton exchange membrane fuel cell (PEMFC), it is better to understand the working procedure with the physical effects and to seek a prediction of the behaviour of this type of fuel cell. This work presents a comparison of the numerical results obtained using two different boundary conditions (current density and voltage boundaries) for the charge transport equation by using a 2D static model of a single cell .
This paper presents a new approach to create a circuit model for static operations of the gas diffusion layer of the PEM fuel cell. The model is based on the Stefan-Maxwell equation. The concept of the energy port, which consists of effort and flow variables at the ports, has been used in this work. The model concept is applied on both anode and cathode sides which has 2 and 3 species, respectively. The resulted model consists of the voltage sources and nonlinear resistors which the value are depended on the molar fractions and the mass fluxes. Finally, the model is connected to the equation models of the other parts of the fuel cell and show a good result of V-I characteristics.
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