The partial pressure of air was ass

The partial pressure of air was assumed to be constant at 1 atm. The partial pressure of water vapor was determined from the operating temperature and relative humidity. A constant wall temperature boundary condition was imposed at the end plates. For the electric potential, zero and constant flux (galvanostatic) boundary conditions were applied at the anode and cathode end plates, respectively. Transport properties such as thermal conductivities, electrical conductivities, and porosities are shown in Table 3, and electrochemical properties are shown in Table 4. In addition, the open circuit voltage was assumed to be constant for 0.95 [15].