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Storing wind-generated energy as gravitational potential energy? - Page 37

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Posted by Alang on December 7, 2008, 6:10 pm
 
On Sun, 7 Dec 2008 07:31:41 -0800 (PST), John Nagelson


Already done in some places.
Two big holes one deeper than the other. Pump water into one and let
it out into the other through a turbine.

Posted by Grimly Curmudgeon on December 7, 2008, 6:59 pm
 
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember John Nagelson


We could close off the tube tunnels under London and fill them with
compressed air. If there's a sudden rupture and London hits the moon, no
great loss.

Posted by Ken Maltby on December 7, 2008, 7:18 pm
 

  In the desert you could just build a "ShortStack", that's a
large tube of plastic sheet forming a chimney for the hot
desert air.  The rising hot air would drive a "windturbine".

  The "ShortStack" was described in a SciFi short story
collection, and in the story was even used to clear the
smog from Los Angeles.  I read where a simular device
was tried out in Spain, a few years back.

Luck;
    Ken




Posted by harry on December 8, 2008, 6:54 pm
 
This is already done. We pump water up a hill & recover the enegy by
letting it run back down. (Pump is also a turbine)  Called a pumped
storage scheme.
All been thought of forty years ago!
http://en.wikipedia.org/wiki/Pumped-storage_hydroelectricity

Water being cheaper and more amendable than concrete blocks.

Posted by Derek Geldard on December 9, 2008, 6:43 pm
 On Mon, 8 Dec 2008 10:54:05 -0800 (PST), harry


We (UK) need about 50 of them.

Why do we have only one ?

It is not as if we are short of water.

Derek


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