On 13/08/2014 08:57, Chris Hogg wrote:
On Wed, 13 Aug 2014 07:59:36 +0100, "Nightjar \"cpb\"@" "insert my
surname here wrote:

On 13/08/2014 07:12, harryagain wrote:
http://thinkprogress.org/climate/201...l-power-wales/



The only renewable energy that I think is worth investing in.

The last two paragraphs, referring to a tidal barrage being proposed
in the US, worried me slightly. The last sentence includes the phrase
"The setup would use pumps to replicate natural tides when
necessary...". Sounds suspiciously like perpetual motion to me! OK, so
it won't be, but it's not obvious what it does actually mean.


According to the company web site, they seem to be promising rather
better than simple perpetual motion, they are offering a net gain in energy:

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

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


--
Colin Bignell