|
|
|
|
|
|
by Veserv
169 days ago
|
|
|
If you have a hill then you can just put a water tank at the top and bottom and a pipe with a pump and a generator in-between. Even if your rolling mass was iron, you would only need a tank 8x larger than your rolling mass in volume (2x per dimension) to be equal in storage. Much easier to build and safer than a 300 ton railcar barreling down a hill. Also scales better, has lower operating cost, has lower capital cost, and has less energy loss. |
|
|