Green hydrogen is a key component of the clean energy transition, offering a sustainable alternative to fossil fuels. Korea Water Resources Corporation (K-water), the nation’s largest renewable energy producer, is leveraging its extensive energy portfolio to expand hydrogen production. By integrating hydropower, tidal, solar, and wind energy, K-water aims to establish a national hydrogen infrastructure, enhancing Korea’s energy security and promoting decarbonization by 2050.
A flagship initiative is the ‘Green Hydrogen Demonstration Facility’ in Seongnam City, which utilizes small-scale hydropower at a water purification plant. The Seongnam pilot facility integrates a 700 kW hydropower system with a 600 kW alkaline electrolyser, producing 10.9 kg of hydrogen per hour. The hydropower source's stable output eliminates the need for energy storage systems, reducing capital and operational expenses. Operational data revealed a 90.9% AC-to-DC conversion efficiency and a 98.1% hydrogen production rate, demonstrating the feasibility of continuous operation. Economic analysis identified electricity costs as the primary driver of LCOH, accounting for 54?71% of operational expenditures. These findings highlight the critical role of governmental support in improving the economic viability of green hydrogen. Through these comprehensive initiatives, K-water is not only advancing domestic hydrogen infrastructure but also contributing to global carbon neutrality goals. Its efforts will support a sustainable energy transition, ensuring Korea remains at the forefront of green hydrogen innovation.