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Finnish City Inaugurates 1 MW/100 MWh Sand Battery

(cleantechnica.com)
190 points erwinmatijsen | 1 comments | 03 Sep 25 06:00 UTC | HN request time: 0.203s | source
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Cthulhu_ ◴[03 Sep 25 08:02 UTC] No.45113336[source]▶
So why a surface sand silo instead of going down and using the soil/clay/bedrock/whatever is there? Ease of installation and maintenance?
replies(2): >>45113364 #>>45114687 #
1. shellfishgene ◴[03 Sep 25 11:55 UTC] No.45114687[source]▶
They heat it by blowing hot air through it, that needs loose, evenly sized material.