Moreover, a semiempirical model based on a thermodynamic approach in order to view the effect of different parameters such as pressure, temperature, anode and cathode channel depth, and air stoichiometry on the performance of the PEMFC and the exergy effi ciencies and irreversibilities of the cell. It is found that with the increase in cell operating temperature and pressure, the cell performance was ameliorated, exergy effi ciency of the cell increases and irreversibilities decrease [15, 17]. Also, a high performance was observed by increasing the channel’s depth for the anode and decreasing the channel’s depth for the cathode side