Semiempirical model based on thermodynamic principles for determining 6 kW proton exchange membrane electrolyzer stack characteristics

摘要: Abstract The performance of a 6 kW proton exchange membrane (PEM) electrolyzer was modeled using semiempirical equation. Total cell voltage represented as sum the Nernst voltage, activation overpotential and ohmic overpotential. A temperature pressure dependent potential, derived from thermodynamic principles, used to model 20 PEM stack. importance including dependence various components is clearly demonstrated. reversible potential without effect decreases with increasing in linear fashion. current densities at both electrodes conductivity were coefficients An experimental system designed around obtain current–voltage characteristics different stack temperatures. nonlinear curve fitting method employed determine equation characteristics. modeling results showed an increase anode cathode temperature. also increased function energy efficiencies temperatures evaluated higher heating value voltages instead fixed 1.48 V.