| Proton exchange membrane fuel cell(PEMFC)is a device that use an electrochemical reaction to generate electricity.They are environmentally friendly with close to zero emissions,also they are small and light and have high efficiency.However,the length ranges of the main components of the PEM fuel cell are varying from micro-to-macro level,and the time scales is ranging from milliseconds to a few hours for the different transport processes.This combination of various spatial and temporal scales makes in-situ measurements or other observations via experimental means extremely difficult.Therefore,numerical simulation becomes an extremely useful tool for better understanding the underlying electrochemical dynamics and transient transport phenomena in PEMFC.The simulation of the PEMFC can be used as a powerful tool in developing and testing PEMFC on a wide scope.In order to achieve a suitable PEMFC model,values for a specific modeling parameter group have to be defined.The selection of those modeling parameters strongly influences simulation outcomes such as pressure,temperature and humidity.The purpose of this report is to examine the influence of operating variables on PEMFC and determine the importance of each parameter on the results of the model.For this work a mathematical model is created and developed in MATLAB based on some simulation condition discussed in the paper.Experimental results predict increasing of PEMFC performance with the increasing of inlet anode pressure and inlet cathode pressure.The result also shows the values of some parameters over time such as the net gas concentration flux between adjacent layers,the gas concentration in catalyst layers,the net water flux between adjacent layers variable,the liquid water saturation in gas diffusion layers and catalyst layers variable,the water content variation in anode catalyst layer,cathode catalyst layer and proton exchange membrane and the temperature variation of membrane electrode assembly(MEA)and channels. |
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