On 14/08/14 11:52, news wrote:
On 14/08/2014 08:49, The Natural Philosopher wrote:

Snip


'It is important to point out that pumping generates more power than it
consumes'

http://www.halcyontidalpower.com/the...al-protection/





At this point you just know its fairy dust




Not saying that this system doesn't have other issues, but as I see it
this single statement is not necessarily wrong. Sure if you are just
moving water from one lake to another it is, but this is a tidal situation.

If you pump water from the sea to the lagoon when the sea is six inches
below the lagoon, and let it out when the sea is six feet below the
lagoon, would this not generate more energy than consumed? (OK the six
inches and six feet might not be the right numbers because of efficiency
losses but in principle?)


well you are then taking some energy from the tides and you MIGHT just
get a shade more out - but 6 feet is an abominable head to get any
efficiency at all.

Its far from a perpetual motion machine since you are relying on a
dropping sea level to increase the head.



--
Everything you read in newspapers is absolutely true, except for the
rare story of which you happen to have first-hand knowledge. €“ Erwin Knoll