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Storing wind-generated energy as gravitational potential energy? - Page 33

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Posted by The Natural Philosopher on December 7, 2008, 4:14 pm
 
John Nagelson wrote:

do the sums, and you will find the answers you want are pretty obvious.

Posted by Dave Liquorice on December 7, 2008, 4:48 pm
 
On Sun, 7 Dec 2008 07:31:41 -0800 (PST), John Nagelson wrote:


If you have the space pumped storage might get you a bit of energy but
you'd probably get <50% back.

Probably best just to dump any electricity you have no immediate need for
into a heat store/bank via emersion heaters, once the store is up to
temperature sell the excess to the grid.

--
Cheers
Dave.




Posted by David Hansen on December 7, 2008, 5:37 pm
 On Sun, 07 Dec 2008 16:48:40 +0000 (GMT) someone who may be "Dave


<http://www.fhc.co.uk/dinorwig.htm>  has figures.

For each unit the pump input is 275 * 7 = 1925MWH

The respective generator output is 288 * 5 = 1440MWH

This is for a full fill and then depletion of the top reservoir.

In other words just under 75% of the energy put in is got back out
again. This does ignore station loads, but these are relatively
small.


--
  David Hansen, Edinburgh
 I will *always* explain revoked encryption keys, unless RIP prevents me
 http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

Posted by Derek Geldard on December 9, 2008, 6:26 pm
 On Sun, 07 Dec 2008 17:37:35 +0000, David Hansen


<Mode = England & Wales>

It's good is that.

We should have built another 50.

I suppose there must be reason why we didn't.

Derek


Posted by The Natural Philosopher on December 9, 2008, 7:41 pm
 Derek Geldard wrote:

Lack of suitable sites mainly.

At Dinorwig, Nature has done most of the construction already..

Plus later on a gar powered station to handle peak demand was chap and
simple..till gas ran out..

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