dennis@home wrote:


"Bill Wright" wrote in message
...
Dave Plowman (News) wrote:

"excess energy generated from renewables. "


It's a method of storing energy created at a time when it isn't needed
until it is in the short term. And the efficiency is said to possibly be
able to approach that of a rechargeable battery. But I dunno how
practical
it is - pumping water up to the top of a hill and using that to run a
hydro electric system has its problems too.

But renewables don't generate excess energy. Even with all renewables
going full tilt (which is unusual) the total output is nowhere near
the UK's lowest demand figure. So if the energy from renewables was
used at any time to power this storage scheme all it means is that
gas-fired stations would have to work a bit harder.

Renewables are erratic, if you can use the energy storage system to
absorb the peaks and troughs it will probably make renewables useful.

Nothing can make reneables useful

What's the energy density of liquid air? Does it make a useful fuel for
cars/lorries?
No.


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.