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Why is Concentrated Solar Power being ignored? - Page 2

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Posted by Colin Watters on February 16, 2008, 9:44 pm
 


I'm impressed.


...yes, you need a good reason to create such high temperatures. I have one,
but alas the sun doesn't shine enough when I need it: southern England (UK,
Europe). In the summer it would work tolerably well, but there's a limit to
how much hot water I need. In the winter I could really use all the heat I
can get to heat the house. But then we're lucky to get one hour direct
sunshine a day. Sometimes it goes for weeks when you never see the sun, just
low cloud, wind, and rain. A bog-standard flat collector is probably more
sensable for me.

The fluidyne engine is interesting, but will it really produce more than a
token level of useable energy?  And you need a heliostat, any ideas on that?

Realistically I think CSP only works at utility scale. But hey, prove me
wrong!

--
Qolin

Email: my qname at domain dot com
Domain: qomputing



Posted by Morris Dovey on February 16, 2008, 9:23 pm
 
Colin Watters wrote:

Don't be. The temperature was too high to be useful, and the
trough has been replaced by a more efficient flat panel. Everyone
wants to get all excited about the high temperature, but seems to
forget that large temperature differentials tend to produce lossy
systems. A 48x96 (inches) flat panel _captures_ more energy than
the 48x96 mirror curved to provide a slightly smaller capture
area - and it's energy, rather than temperature, that powers our
engine...


For your use and location (and nearly any other location, as
well) the flat panel is a superior solution. I'd suggest that you
keep an eye out for Mary Fisher here in a.s.t and ask her to
share her UK experiences. AFICT, she did her homework well and
put together a good solar water-heating solution.


We've managed to increase the stroke to about 9" (23 cm) with a
4" (~10 cm) at 1/2 Hz - and we're working to achieve an 18"
stroke. We're optimistic that it'll be able to produce ~2 hp. One
of the things that's kept the project interesting has been that
every time we've managed to significantly increase the power, the
!@#$% thing finds a new weak spot and self-destructs.


Ok. I understand that (concentrating) solar cookers are in fairly
wide use in parts of southern Asia. :-)

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto

Posted by Colin Watters on February 16, 2008, 10:48 pm
 

Email: my qname at domain dot com
Domain: qomputing



Posted by Colin Watters on February 20, 2008, 8:19 am
 
http://www.renewableenergyworld.com/rea/news/story?idQ581

--
Qolin

Email: my qname at domain dot com
Domain: qomputing



Posted by Colin Watters on February 22, 2008, 10:02 pm
 http://www.tucsoncitizen.com:80/daily/local/77596.php

--
Qolin

Email: my qname at domain dot com
Domain: qomputing



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