شبيه‌سازي عددي الكترولايزر غشا پليمري دما بالا: با هدف مطالعه توزيع دما و مديريت حرارتي

Green hydrogen is considered a key option for the transition towards low-carbon energy systems, an‎d proton exchange membrane water electrolysers (PEMWEs) offer an efficient route for its production. The performance an‎d durability of PEMWEs strongly depend on the spatial distribution of temperature, current density an‎d species within the active layers, making thermal management a critical design aspect. In this study, a three-dimensional multiphysics model of a single PEM water electrolysis cell with twelve parallel flow channels is developed in ANSYS Fluent. The model couples the continuity, momentum, energy an‎d species transport equations with electrochemical kinetics, an‎d is validated against experimental polarization data from the literature after a grid-independence study. On this validated basis, the influence of several key parameters on the thermal an‎d electrochemical behaviour of the cell is investigated, including the thermal boundary condition at the terminal surfaces (isothermal vs. adiabatic), the presence of water flow in the cathode channel, the inlet water mass flow rate, the thickness an‎d thermal conductivity of the gas diffusion layer (GDL), an‎d the operating temperature. The results indicate that adiabatic terminal boundaries, especially at higher voltages, lead to a pronounced increase in peak temperature an‎d thermal non-uniformity, whereas allowing heat dissipation through the terminals significantly mitigates these effects. Supplying water to the cathode channel an‎d increasing the inlet flow rate reduce the maximum temperature an‎d moderately enhance current density an‎d hydrogen mass fraction. Increasing GDL thickness improves the uniformity of temperature an‎d current density distributions, but lowers peak current density an‎d hydrogen production due to higher ohmic an‎d transport resistances. These findings provide a consistent numerical framework an‎d practical guidelines for thermal management an‎d design optimisation of PEM water electrolysers, an‎d can be extended to stack-level an‎d industrial operating condition

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هادي صفائي , ايمان فخاري گلپايگاني