Iranian Research Organization for Science and Technology (IROST) Hydrogen, Fuel Cell & Energy Storage 2980-8537 12 1 2025 01 04 Investigating the Effects of Operating Parameters on Hydroxy Gas Production through Solar-Powered Alkaline Water Electrolysis: a COMSOL Simulation and Experimental Approach 9 18 1491 10.22104/hfe.2024.7083.1314 EN Liaquat Ali Khan Marine Engineering Department Military Technological College, Muscat Muhammad Bilal Arshad Department of Mechanical Engineering, National University of Technology Islamabad, Pakistan Ali Raza Department of Mechanical Engineering, National University of Technology Islamabad, Pakistan Journal Article 2024 03 12 Depletion of conventional fossil fuels poses a significant concern, especially in transportation, where demand exceeds the production rate, hence, risk of fuel crisis. Fossil fuel combustion also heavily pollutes the environment, impacting global quality of life. Therefore, renewable and clean energy alternatives are urgently needed for sustainability. Hydrogen energy, particularly when sourced from renewable power like solar or wind, presents a promising solution. This study explores a unique approach to hydrogen production through a solar-powered alkaline electrolyzer, using both simulation and experimental testing to optimize its efficiency. The study uses COMSOL Multiphysics to simulate various operating conditions, which were then validated experimentally. Key operating parameters such as electrode spacing, electrolyte concentration, and temperature were systematically adjusted to identify conditions that maximize gas output. An innovative control system monitored and regulated the gas pressure, automatically shutting off the electrolyzer at 1.8 bars to ensure safety and efficiency. Findings highlight how close electrode spacing, higher electrolyte concentration, and elevated temperatures significantly boost hydrogen production. https://hfe.irost.ir/article_1491_7665753a90e21d14172f08255679175e.pdf