Hydrogen is being developed as an electrical energy storage medium. Hydrogen is produced, then compressed or liquefied, stored, and then converted back to electrical energy or heat or used as an input to (industrial) processes. Hydrogen can be used as a fuel for portable (vehicles) or stationary energy generation. Compared to pumped water storage, CAES and batteries, hydrogen has the advantage that it is a high energy density fuel that can be fed into the grid, stored or converted in ammonia and then stored. Hydrogen can be directly converted to electrical energy using an electrolyser. Currently, Power-to-gas is in the spotlight as a means of converting excess electricity to hydrogen or methane gas. The projects listed here reflect some or more of these process steps.
Applications: long term-storage, arbitrage