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There often is a renewable energy surplus at night (wind /hydro) and more recently even around noon, thanks to solar. And renewables are constantly expanding.
by the_duke 4y ago
There often is a renewable energy surplus at night (wind /hydro) and more recently even around noon, thanks to solar. And renewables are constantly expanding.
The whole problem with renewables is the temporal variation and lack of large scale storage.
Producing hydrogen (and potentially converting that into more traditional gasses) is a perfectly viable solution, but of course such infrastructure can only be stood up over years and decades. It's not relevant for this winter.
- westurner 4y agoTIL that apparently Compressed Air Energy Storage (CAES) has the lowest cost of any method of energy storage? "Techno-economic analysis of bulk-scale compressed air energy storage in power system decarbonisation" (2021) https://www.sciencedirect.com/science/article/pii/S0306261920315208 https://www.sciencedirect.com/science/article/pii/S030626192... https://www.pv-magazine.com/2022/07/21/compressed-air-storage-vs-lead-acid-batteries/ https://www.pv-magazine.com/2022/07/21/compressed-air-storag... : > They found the former has a considerably lower Capex and a payback time of only two years. [compared with Lead Acid batteries] I wouldn't thought that a Gravity Battery would've been more efficient than compressed air: https://en.wikipedia.org/wiki/Gravity_battery https://en.wikipedia.org/wiki/Gravity_battery Also TIL about geothermal heat pump energy storage: https://techxplore.com/news/2022-09-geothermal-ideal-energy-storage-technology.html https://techxplore.com/news/2022-09-geothermal-ideal-energy-... :