Posted by rpautrey2 on November 2, 2008, 5:44 am
'Know It All',
Take it up with the inventor and MIT!
PA
> rpautrey2 wrote:
> > (NaturalNews) A successful test has been carried out of a new
> > prototype solar dish that concentrates solar rays by 1,000 times,
> > creating what inventor Doug Wood has called "the most efficient solar
> > collector in existence."
> BS detector alert. How efficient? Numbers please.
> > The device is a 12-foot-wide dish made from thin, mirrored aluminum
> > tubing and strips of mirrored glass. Water runs through the center of
> > the dish in a coil of tubing, which is painted black for maximum heat
> > absorption.
> What kind of paint is being used that'll withstand 1,000 suns? I'm
> interested in manufacturer, source, and price (or is this "theoretical"
> paint?)
> > The collector is so effective at focusing light that when it is
> > pointed directly at the sun, the water in the middle instantly
> > vaporizes into steam. The prototype has also been used to set a plank
> > of wood on fire, and researchers believe that it should be able to
> > generate enough heat to melt steel.
> Very impressive. See 3rd and 4th photos from the bottom athttp://www.iedu.com/DeSoto/Projects/Stirling/Heat.html- and that was
> only a 4' wide collector.
> > Wood has signed over the rights to the device's design to a team of
> > MIT students, who built the prototype and have launched a company to
> > mass produce the devices. The company, RawSolar, hopes to use heat
> > generated by the collector to produce steam for electricity
> > generation, industrial processing, or heating or cooling buildings.
> Heck of a deal. I wonder if the MIT kids were dazzled.
> > Wood spoke approvingly of the changes that the students had made to
> > his design
> Hmm. Maybe not as dazzled as he'd hoped...
> > "They really have simplified this and made it user-friendly, so
> > anybody can build it," he said.
> Barring some disability or lack of high school math skills, why would
> anyone not be able to build a parabolic trough?
> > Unlike with many alternative energy sources, large-scale production is
> > not required to make the solar dishes cost-efficient, Wood said.
> > Because the materials to make the device are so cheap and because
> > larger dishes require a larger, more expensive support structure,
> > small dishes actually costs only one-third as much as large ones for
> > every unit of collecting area.
> BS detector alert!
> > "I've looked for years at a variety of solar approaches, and this is
> > the cheapest I've seen," said David Pelly of MIT. "And the key thing
> > in scaling it globally is that all of the materials are inexpensive
> > and accessible anywhere in the world."
> Hmm. David needs to get out a bit more.
> > Sources for this story include:www.foxnews.com;web.mit.edu.
> I would have expected better of an MIT public source.
> --
> Morris Dovey
> DeSoto Solar
> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/
Posted by harry k on November 2, 2008, 10:31 am
> 'Know It All',
> Take it up with the inventor and MIT!
> PA
<snip>
See. That is what your first response (if any) should have been
rather than going into 'insult mode' At least that way you could have
retreated with a bit of dignity.
Harry K
Posted by Eeyore on November 2, 2008, 1:42 pm
rpautrey2 wrote:
> 'Know It All',
He knows a devil of a lot more than you press release junkie.
> Take it up with the inventor and MIT!
MIT's press dept have caught a stupid virus. Just like you.
Graham
Posted by Jim Wilkins on November 2, 2008, 12:24 pm
The raw-solar website isn't very helpful but it looks like they might
be using aluminized polyester for the mirrors. I have a small version
of this made from a truck mirror replacement sheet, set up to give a
magnified view of the top of my chimney from indoors so I can adjust
the stove air inlet for no smoke. The material has held up quite well
outdoors for about five years.
The narrow strips suggest that the mirrors are parabolic in only one
direction.
Posted by Duane C. Johnson on November 2, 2008, 2:11 pm
Hi Jim;
> The raw-solar website isn't very helpful but it looks
> like they might be using aluminized polyester for the
> mirrors.
Doug Wood, (aka. sunflower), uses 1' x 12' flat glass
mirrors with rear reflective surfaces. Glass is much
preferred for its flatness and long life. He's been
working on this configuration for quite some time, 2001.
See his patent:
http://www.google.com/patents?vid=USPAT6485152
http://www.redrok.com/neat.htm#US6485152 2001
And others:
http://www.redrok.com/neat.htm#US4491388 1985
http://www.redrok.com/neat.htm#US4372772 1983
> I have a small version of this made from a truck
> mirror replacement sheet, set up to give a magnified
> view of the top of my chimney from indoors so I can
> adjust the stove air inlet for no smoke. The material
> has held up quite well outdoors for about five years.
> The narrow strips suggest that the mirrors are
> parabolic in only one direction.
Not quite. Yes, each glass mirror strip produces a
focus line. However, all strips overlap each other.
His dish concentrator was designed to provide very
even light intensity over an area of about 1" x 12"
and a concentration ratio of greater than 1000X for
use with high concentration photo voltaic arrays.
Duane
--
Home of the $35 Solar Tracker Receiver
http://www.redrok.com/led3xassm.htm [*]
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> > (NaturalNews) A successful test has been carried out of a new
> > prototype solar dish that concentrates solar rays by 1,000 times,
> > creating what inventor Doug Wood has called "the most efficient solar
> > collector in existence."
> BS detector alert. How efficient? Numbers please.
> > The device is a 12-foot-wide dish made from thin, mirrored aluminum
> > tubing and strips of mirrored glass. Water runs through the center of
> > the dish in a coil of tubing, which is painted black for maximum heat
> > absorption.
> What kind of paint is being used that'll withstand 1,000 suns? I'm
> interested in manufacturer, source, and price (or is this "theoretical"
> paint?)
> > The collector is so effective at focusing light that when it is
> > pointed directly at the sun, the water in the middle instantly
> > vaporizes into steam. The prototype has also been used to set a plank
> > of wood on fire, and researchers believe that it should be able to
> > generate enough heat to melt steel.
> Very impressive. See 3rd and 4th photos from the bottom athttp://www.iedu.com/DeSoto/Projects/Stirling/Heat.html- and that was
> only a 4' wide collector.
> > Wood has signed over the rights to the device's design to a team of
> > MIT students, who built the prototype and have launched a company to
> > mass produce the devices. The company, RawSolar, hopes to use heat
> > generated by the collector to produce steam for electricity
> > generation, industrial processing, or heating or cooling buildings.
> Heck of a deal. I wonder if the MIT kids were dazzled.
> > Wood spoke approvingly of the changes that the students had made to
> > his design
> Hmm. Maybe not as dazzled as he'd hoped...
> > "They really have simplified this and made it user-friendly, so
> > anybody can build it," he said.
> Barring some disability or lack of high school math skills, why would
> anyone not be able to build a parabolic trough?
> > Unlike with many alternative energy sources, large-scale production is
> > not required to make the solar dishes cost-efficient, Wood said.
> > Because the materials to make the device are so cheap and because
> > larger dishes require a larger, more expensive support structure,
> > small dishes actually costs only one-third as much as large ones for
> > every unit of collecting area.
> BS detector alert!
> > "I've looked for years at a variety of solar approaches, and this is
> > the cheapest I've seen," said David Pelly of MIT. "And the key thing
> > in scaling it globally is that all of the materials are inexpensive
> > and accessible anywhere in the world."
> Hmm. David needs to get out a bit more.
> > Sources for this story include:www.foxnews.com;web.mit.edu.
> I would have expected better of an MIT public source.
> --
> Morris Dovey
> DeSoto Solar
> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/