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Why is Concentrated Solar Power being ignored?

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Posted by briechely@gmail.com on February 16, 2008, 9:07 am
 
Why does no one look into CSP (concentrated solar power)?  It is may
times more efficient than photo voltaic.  And with its thermal energy
storage it needs no troublesome batteries for night time energy
supply.

For details, see
www.energylan.sandia.gov/sunlab/research.htm
A desert area 10 by 15 miles could provide 20,000 MW of power, while
the electricity needs of the entire U. S. could theoretically be met
by an area 100 miles on a side.
For a list of working solar thermal power stations, see:
http://en.wikipedia.org/wiki/List_of_solar_thermal_power_stations
FAQ: www.energylan.sandia.gov/sunlab/faqs.htm
Molten salt thermal storage for night time power:
www.sandia.gov/Renewable_Energy/solarthermal/NSTTF/salt.htm
http://en.wikipedia.org/wiki/Thermal_energy_storage
Thermal efficiencies, over one year, of 99% have been predicted. The
molten salt is a mixture of 60 percent sodium nitrate and 40 percent
potassium-nitrate, commonly called saltpetre.
The salt melts at 430F (221 degrees Celsius). It is kept liquid at
550F (288 degrees Celsius) in an insulated "cold" storage tank. The
liquid salt is pumped through panels in a solar collector where the
focussed sun heats it to 1050F (566 degrees Celsius). It is then sent
to a hot storage tank. This is so well insulated that the thermal
energy can be usefully stored for up to a week.
National Renewable Energy Laboratory, www.nrel.gov
http://en.wikipedia.org/wiki/Solar_power_plants
http://en.wikipedia.org/wiki/Solar_power_plants_in_the_Mojave_Desert
http://en.wikipedia.org/wiki/World_energy_resources_and_consumption
http://en.wikipedia.org/wiki/Solar_Energy_Generating_Systems
http://en.wikipedia.org/wiki/Solar_thermal_energy
http://de.wikipedia.org/wiki/Sonnenw%C3%A4rmekraftwerk
http://en.wikipedia.org/wiki/Solar_power_plants_in_the_Mojave_Desert
Solar One was upgraded to Solar Two, which operated from 1996 to 1999.
Both systems had the capacity to produce 10 MW of power.


Posted by Anthony Matonak on February 16, 2008, 9:41 am
 
briechely@gmail.com wrote:

Thermal solar power plants have been looked at and, to the best of
my knowledge, several of them are in construction right now. They
aren't all that much cheaper than the newer PV technologies and they
have higher maintenance costs. Batteries aren't all that troublesome
or expensive and that thermal energy storage has it's own troubles.
Let's not forget that "thermal" oil they use in those solar power
plants and how easily it burns and releases toxic clouds of smoke.

Anthony

Posted by nicksanspam on February 16, 2008, 10:35 am
 

Then again, we have water, ammonia, and molten salts.

Nick


Posted by Colin Watters on February 16, 2008, 11:35 am
 

'Some people' are looking into CSP. But those people are utility-scale,
large business types, and probably they don't spend time chatting in
newsgroups like this. Folks here are small scale operators and Joe public
who might slap a PV (etc) system on the roof or in the garden.

--
Qolin

Email: my qname at domain dot com
Domain: qomputing



Posted by Morris Dovey on February 16, 2008, 11:27 am
 Colin Watters wrote:

http://www.iedu.com/DeSoto/Stirling/Heat.html

Hmm - not exactly utility-scale, and probably spend too much time
chatting in newsgroups like this.

CSP requires at a degree [sorry] of precision that most
knock-something-together types don't seem willing to spend time
on - and it's inherently hazardous to living things. There are
easier and safer projects.

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

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