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Special report

Money and Business Climate Solutions

6 Articles
RheEnergise employees oversee the construction of a High-Density Hydro® demonstrator project near Plymouth in Devon, Britain. September, 2024 (Handout from RheEnergise)

Pumped up: how 'high density hydro' could supercharge global energy storage

Say energy storage and most imagine EV lithium-ion batteries. But a range of "long duration" concepts that store power for weeks rather than hours are coming to market, among them one called high-density hydro that uses a mud-brown slurry pumped through a long loop of plastic pipe on a hillside to store energy until it's needed. With first systems now being built, the technology could change the way renewables-powered grids work in the future.