Expressed the 20th February 2024

The idea here is to repurpose unused but functioning water towers or Flaktowers in eastern Europe into gravity batteries. See here for more documentation about Flaktowers— or here for a video — these remnants building were strongholds during world war two.

Gravity battery is a recent concept where heavy charges are piled up with a crane, then they are hung up so they come back down slowly — generating power through a dynamo. You can see more on the video below.

By repurposing these towers, you would have a minimal height imposed by the structure of the building itself, if energy consumption to bring the charges is high at the beginnings, the resulted stocked energy is proportionally high too. Moreover for this idea, you could use plastic or metal waste blocks as charges for the gravity battery — plastic coming from sanitized waters, industrial wastes or old textile (see here for the transformation process)— and metal from packed broken cars (clic here to see a short video showing plastic wastes being reduced into blocks).