Submitted by ChriAZii t3_10h1z2n in Futurology
paulfdietz t1_j578iwr wrote
Reply to comment by wwarnout in Climate change: "Sand battery" could solve green energy's big problem [July, 2022] by ChriAZii
At a grid scale, sand batteries using resistive heating can regenerate electrical power with ~53% round trip efficiency, LCOS of maybe $0.05/kWh.
https://arpa-e.energy.gov/sites/default/files/2021-03/07%20Day1-Zhiwen%20Ma_NREL.pdf
Babcock and Wilcox are commercializing this technology now.
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