The Effect of Renewable Energy Power Fluctuations on Water Electrolysis for Green Hydrogen Production

The advancement of renewable energy technologies stands critical in achieving carbon neutrality. Hydrogen, as a stable and transportable resource, holds promise for optimizing power utilization on a large scale. However, harnessing green hydrogen through water electrolysis methods directly driven by naturally intermittent fluctuating power requires a nuanced understanding. Such processes significantly differ from industrial electrolysis reliant on consistent grid power. Addressing the challenges associated with direct utilization of fluctuating power becomes imperative. This chapter critically examines fluctuating power's characteristics, generation dynamics, operational prerequisites, electrolyzer configuration, system demands, stack/catalyst durability, and degradation mechanisms. Additionally, it proposes an accelerated degradation test protocol method to ensure fair catalyst performance evaluation and shares effective design approaches.