Alkaline electrolyzer plays a pivotal role in advancing the development of renewable energy. Increasing temperature can effectively reduce hydrogen production energy consumption; however

localized overheating caused by uneven temperature distribution threatens the operational safety of alkaline electrolyzer. Therefore

this paper establishes a model of an alkaline electrolyzer incorporating multiple cells

proposes a parameter transfer strategy to reduce computational complexity

and summarizes the temperature distribution characteristics of alkaline electrolyzer. Based on the quantitative metrics

the effects of operating parameters and geometric structures on temperature distribution are analyzed. Finally

research on capacity expansion strategies for industrial alkaline electrolyzers is conducted. Results indicate that operating parameters including inlet temperature

inlet flow velocity

and current density significantly influence temperature distribution. Increasing the number of cells leads to a rise in temperature in the central cells

while expanding electrode area improves temperature distribution uniformity. Excessively low cell-to-electrode-area ratio increases the maximum temperature

whereas excessively high cell-to-electrode-area ratio causes temperature distribution distortion. The research findings provide reference for ensuring safety and capacity expansion of alkaline electrolyzer.