本文基于水、气交界面的条件，考虑了蒸发冷凝比例、压力降等因素对水含量变

In this paper, based on the conditions of the interface between water and gas, considering the influence of evaporation and condensation ratio, pressure drop and other factors on the change of water content, a proton exchange membrane fuel cell condensation rate model is established. The model not only numerically analyzes the fluid flow problem and the convective coupled heat transfer problem in laminar flow, but also conducts the migration and diffusion of liquid water in the proton exchange membrane, the penetration of the catalytic layer and the diffusion layer, and the convective diffusion in the flow channel. simulation. Finally, a fuel cell test system is established, and experiments are conducted under different working conditions, and the model values ​​and experimental values ​​are compared and analyzed.

Based on the conditions of the water and gas interface, this paper considers the effect of evaporative condensation ratio and pressure drop on water content changes, and establishes a model of condensation rate of proton exchange membrane fuel cell. The model not only analyzes the problem of fluid flow and the problem of fluid coupling heat exchange in the stratospheric flow state, but also simulates the flow diffusion in the migration diffusion of liquid water in proton exchange membrane, the penetration of the catalytic layer and the diffusion layer, and the convection diffusion in the flow. Finally, a fuel cell test system is established, experiments are carried out under different operating conditions, and the model values and experimental values are compared and analyzed.

In this paper, based on the condition of water gas interface, considering the influence of evaporation condensation ratio, pressure drop and other factors on the change of water content, the condensation rate model of PEMFC is established. The model not only simulates the fluid flow and convection coupled heat transfer in laminar flow, but also simulates the transfer and diffusion of liquid water in the proton exchange membrane, the penetration of catalyst layer and diffusion layer, and the convection and diffusion in the channel. Finally, the fuel cell test system is established, and experiments are carried out under different working conditions.<br>