Research On Numerical Simulation Of Fuel Cell Stack's Working Performance And Thermal Management Under Variable Operating Conditions

One notable characteristic of the working process of proton exchange membrane fuel cells (PEMFCs) is that their output power and temperature are significantly influenced by factors such as operating conditions and the flow field at the anode and cathode. In this work, numerical simulations were conducted to study the operational performance and thermal management of a hydrogen-oxygen PEMFC stack. The study utilizes the method of controlling variables to investigate the impact of pressure and humidity on the performance and thermal management of fuel cells. The results indicate that within a specified range, an increase in humidity leads to a decrease in current densities while promoting a more uniform temperature distribution. As the pressure increases, both the average, maximum, and minimum temperatures across each proton exchange membrane also rise, while the current density shows a decreasing trend.