The assumptions were as follows: (1) a unit cell was considered;(2) an ideal heat exchange was assumed between the exhaust gas and reactant [14]; (3) operating parameters such as the temperature, pressure, relative humidity, and stoichiometric ratio were assumed to be equal at the inlet of the anode and cathode sides; (4) only the compression work was taken into account for the BOP components; and (5), power demands for stack cooling, system control, and pumping power were not considered.