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
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.
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
All been thought of forty years ago!
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.