A Devon based company called RheEnergise has come up with another contender, which it calls the Holy Grail of energy storage, and has just been awarded an £8.25m government contract to deploy a 250kW/1MWh demonstration installation at a mine close to Plymouth within the next 18 months.
The technology works by using surplus energy at times of low demand to pump its bespoke High-Density Fluid R-19 to up-hill storage tanks for release through turbines at the bottom of the hill at times of higher demand. The specially developed high-tech fluid is 2.5 times the density of water and can therefore store and release 2.5 times the energy than similar scale conventional hydro installations.
Equally as impressive as being awarded the funding was a mention on Farming Today on 10 November where the RheEnergise technology was described as a gravitational battery.
This is another excellent example of the contribution that the South West of England makes to the rest of the world.