Forget pumped hydro ..

[johnsmith]

Forget pumped hydro, in a country like Australia that it littered with unused mine shafts, it seems that gravity is the future

Dormant coal mine turns green electricity generator in world-first test

A disused coal mine in Wollongong will be the first test site for a renewable energy company that lowers weights down old mine shafts to spin turbines and create electricity.

www.abc.net.au

 

[HBS Guy]

Need deeep mines.

 

[johnsmith]

Need deeep mines.

we've got plenty of those

 

[HBS Guy]

Broken Hill for one.

 

[Squire]

It is very expensive to install stuff in old mines and high cost and dangerous to maintain equipment.

 

[HBS Guy]

Only need the shaft, and a superstructure over it to hold the motor/generator.

 

[johnsmith]

It is very expensive to install stuff in old mines and high cost and dangerous to maintain equipment.

more expensive to dam rivers and build and maintain pumped hydro