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I think as of today the most efficient approach is pumped storage hydropower. However that is severely limited by geography
by BoGoToTo 4y ago
I think as of today the most efficient approach is pumped storage hydropower. However that is severely limited by geography
- bluefirebrand 4y agoI'm guessing that available fresh water is something of a limiting factor here as well. We have abundant salt water of course. I imagine that generator turbines don't love salt water very much.
- cupofpython 4y agoit is the most efficient in terms of energy transfer. I think it is lacking in terms of actual storage capacity. the upfront costs are also extreme. ideally, every green energy farm would have a gravity well storage system nearby (like pumped storage) for the purposes of keeping discharge steady. Energy would be transferred into and out of this system pretty quickly, and stored in a more cost/size efficient storage option that could act as the true "battery" on dark days / longer periods of energy production downtime
- alexk307 4y agoI wonder how difficult this would be to implement for consumers/smaller deployments. Could someone dig an underground pool sized hole for a tank of hot water that can be converted back to electricity?
- PaulHoule 4y agoIt is really shocking how big of a tank you need for this.
- eande 4y agoA good example is the large scale hydropower project in Switzerland where they added 900MW capacity to the grid for storage. They do have a good geography for that. https://www.reuters.com/business/sustainable-business/switzerlands-new-energy-asset-hydro-plant-with-capacity-charge-400000-car-2022-08-05/ https://www.reuters.com/business/sustainable-business/switze...