Underground Hydrogen Storage (UHS) is a low-cost and market-ready storage solution that is safe and can build on existing infrastructure resources, as well as complement a nascent hydrogen eco-system in Europe. Currently, salt caverns, depleted gas fields, aquifers, and rock caverns are the pre-dominately used storage technologies. Amongst these storage types, distinctions in size, withdrawal and injection rates, cycle capacity, and repurposing maturity are evident. A series of innovative UHS projects are currently being carried out within the EU to investigate and analyse repurposing potential, as well as necessary changes in plant design and layout to meet exacting standards.
