Hydrogen storage represents a crucial challenge for the energy transition. While various storage methods are being explored, a promising solution is emerging: natural lakes. These bodies of water could play a key role in the production and storage of green hydrogen, notably through innovative projects like H2V FOS, capable of producing 84,000 tons of hydrogen per year. The potential of these lakes offers a fascinating perspective for overcoming storage-related obstacles and improving volumetric energy density.
The idea of producing green hydrogen from natural sites like lakes is gaining popularity. The H2V FOS project is a compelling example, with an ambition to produce 84,000 tons of hydrogen per year. This production relies on the use of six 100 MW electrolyzers, demonstrating the potential of hydrographic resources to support the energy transition. By combining renewable energy with innovative storage solutions, it becomes possible to ensure a stable supply of hydrogen throughout the year.
Hydrogen storage technologies in lakes
Hydrogen storage remains a major challenge for the sector. In response to this, the design of new technologies is essential to maximize the efficiency of natural reservoirs such as lakes. Depleted hydrocarbon reservoirs are often highlighted as the most viable solutions for underground gas storage due to their capacity and enhanced safety. However, lakes offer a potentially cheaper and more environmentally friendly alternative, using natural materials like rocks and sand for stationary energy storage.
Risks and potential solutions
The risks associated with hydrogen storage in lakes should not be underestimated. The Atomic Energy Commission (CEA) is actively working on managing these risks by using technological platforms for advanced characterization, modeling, and simulation of storage processes. At the same time, hydrogen production through surface separation in addition to geothermal energy could provide a viable solution in many geographical areas. These integrated approaches are crucial to ensure that lakes can serve as reliable reservoirs for the new energy era.
