On 24/05/17 14:01, Harry Bloomfield wrote:
Tim Streater explained on 24/05/2017 :
Maybe its cheaper just to flood old mines and use turbines to
generate power then pump them out when there is little demand. Is it
any less efficient than a bleedin big battery which needs to then be
converted to AC in any case?

Flood them with what?

Water?

I would not think the water capacity of a disused mine would be enough
to make it worth while.

Of course it isn't., But you are supposed to applaud the IDEA and the
INTENTION. this isn't engineering, its virtue signalling politics FFS!

--
"In our post-modern world, climate science is not powerful because it is
true: it is true because it is powerful."

Lucas Bergkamp