3 ms·
Seems quite useless to me as the earth's gravitational field is not very strong. Supposing that you could store the concrete blocks at a height of 50m (which i
by Faaak 8y ago
Seems quite useless to me as the earth's gravitational field is not very strong.
Supposing that you could store the concrete blocks at a height of 50m (which is already a lot), you would need roughly 8000 tons to store 1 MWh. Taking account concrete density (2400kg/m^3), that's 19000 barrels !
- monk_e_boy 8y agoI wonder why they dont put the blocks / dirt into train wagons and drive them up hill. Then generate electricity through retroactive breaking as it descends. Maybe the efficiency isn't 85%... but it sounds cheaper and simpler to make.
- andruby 8y agoSee https://www.aresnorthamerica.com/grid-scale-energy-storage https://www.aresnorthamerica.com/grid-scale-energy-storage
- icebraining 8y agoHills aren't available everywhere (see e.g. the Netherlands).
- PhasmaFelis 8y ago> Seems quite useless to me as the earth's gravitational field is not very strong. Citation needed. The vast majority of current energy storage uses pumped hydro. > Supposing that you could store the concrete blocks at a height of 50m (which is already a lot), you would need roughly 8000 tons to store 1 MWh. Taking account concrete density (2400kg/m^3), that's 19000 barrels ! Both the video and the article make it clear that the thing with the barrels is a 1/10th-scale prototype. The full-size version is slated to stand 120 meters tall and use 35-ton concrete blocks.
- deleted 8y ago[deleted]