We went to Finland to hear about the new 'sand battery' that will turn stored renewable energy back into power for the electrical grid

https://slrpnk.net/post/36223603

We went to Finland to hear about the new 'sand battery' that will turn stored renewable energy back into power for the electrical grid - SLRPNK

Lemmy

I know it meets the technical definition of battery but I wish they would come up with different names for things like this. This feels more like energy conversion with some temporary storage characteristics than what I would call a “battery.”

I did a little bit of digging on this and if it looks like sand batteries are a subcategory of thermal batteries, which in their turn are part of what is called thermal energy storage . Wiki mentioned something that I found fascinating and that I totally didn’t know:

Thermal batteries are very common, and include such familiar items as a hot water bottle. Early examples of thermal batteries include stone and mud cooking stoves, rocks placed in fires, and kilns.

Thermal energy storage - Wikipedia