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| habshi... |
 Posted: Tue Sep 22, 2009 2:36 am |
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http://www.bbc.co.uk/iplayer/episode/b00mqjjg/Bang_Goes_the_Theory_Series_1_Episode_8/
Slide the timer to 24 minutes
It collects the energy the earth loses at night. It has billions of
recievers as infra red wavelength is small and collect energy from all
sources
While chemists are thinking about a paint with embedded nanoreceptors
that catch the sunlight and transform it to electricity, materials
scientists at the Idaho National Labs run by the U.S. Department of
Energy have come up with a plastic with embedded nanoantennas that
catch heat energy and transform it into electricity.
Capturing heat energy means capturing considerably more energy than
capturing light. And it means capturing energy even when it is dark
from any source of heat.
Because it captures heat, the plastic can be a “skin” for devices
that drains away heat and turns it into electricity. It could power
anything from an electric car to an Iphone.
Obstacle: The electricity generated from the heat is alternating
current (AC) at a very high current, a current so high it requires a
rectifier better than any now available. To use the skins, the INL
research team must either invent a new kind of rectifier or develop
new circuitry for the skin.
Eventually, INL hopes to develop double-sided skin to cover anything
from building roofs to consumer gadgets, providing cheap, ongoing
energy.
This video explains it.
Flexible Nanoantenna Arrays Capture Abundant Solar Energy
August 10, 2008 (DOE/Idaho National Lab via EurekAlert)
WHO
Idaho National Laboratories (INL) of the U.S. Department of Energy
(DOE); Steven Novack, physicist/research team leader; INL; INL
research team (Dale Kotter, engineer, INL; W. Dennis Slafer,
MicroContinuum, Inc.; Patrick Pinhero, formerly INL & presently at the
University of Missouri)
WHAT
Nanoantennas could be the key to a flexible, plastic, potentially
inexpensive solar energy collector that would coat and power anything
requiring electricity.
WHEN
- Nanoantenna-embedded plastic sheets could someday power anything
from an electric vehicle to an iPod.
- Findings reported August 13 at the American Society of Mechanical
Engineers 2008 2nd International Conference on Energy Sustainability.
- While current solar cells generate electricity from light and only
produce power during the day, the nanoantennas in the skins generate
electricity from any available heat source and could produce power
even at night.
WHERE
- Research from DOE’s Idaho National Labs.
- Findings reported at the conference in Jacksonville, Fla.
- Because the nanoantennas produce power from heat, locating them near
a traditional power plant would allow them to generate electricity
from the plant’s normally wasted thrown-off heat.
WHY
- The “skin” would also serve as an insulator by drawing off heat
from the sun.
- The nanoantennas pick up mid-spectrum infrared light as heat energy
whereas current solar cells pick up visible light.
- Nanoantennas: tiny gold squares or spirals set in a specially
treated form of polyethylene (a plastic).
- Earliest tests were with silicon.
- With the right plastic materials, scientists expect to harvest 92%
of available energy.
- The infrared current is very high, requiring a rectifier beyond the
capacity of current technology.
- An alternative to new rectifier technology is new circuitry for the
skin.
The production process lends itself to creating a double-sided skin
and to mass production at several yards per minute.
QUOTES
- Steven Novack, physicist/research team leader, INL: "Every process
in our industrial world creates waste heat…It's energy that we just
throw away."
- Dale Kotter, engineer/research team member, INL: "We need to design
nanorectifiers that go with our nanoantennas…"
Posted: 2008-08-14 09:15:00
Read Full Article
BIG CALIF SOLAR POWER PLANT DEAL - IF...< Prev Next >WHAT WILL
VERMONT BUILD FOR NEW ENERGY?
http://www.solarfeeds.com/index.php?option=com_content&view=article&id=2997:solar-skin-a-sheet-of-tiny-antennas&catid=80:80&Itemid=173 |
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| Uncle Al... |
| Posted: Tue Sep 22, 2009 9:43 am |
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Guest
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habshi wrote:
[snip crap]
[quote:5896737ffd]It collects the energy the earth loses at night. It has billions of
recievers as infra red wavelength is small and collect energy from all
sources
[snip rest of crap][/quote:5896737ffd]
1) Second Law.
2) idiot
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2 |
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| The Fisherman... |
| Posted: Tue Sep 22, 2009 9:53 am |
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Guest
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On Sep 22, 4:43pm, Uncle Al <Uncle... at (no spam) hate.spam.net> wrote:
[quote:fac4c38358]habshi wrote:
[snip crap]
It collects the energy the earth loses at night. It has billions of
recievers as infra red wavelength is small and collect energy from all
sources
[snip rest of crap]
1) Second Law.
2) idiot
--
Uncle Alhttp://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)http://www.mazepath.com/uncleal/lajos.htm#a2
[/quote:fac4c38358]
uncle muppet, tis all |
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| habshi... |
| Posted: Thu Sep 24, 2009 4:20 am |
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Guest
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excerpt
Flexible nanoantenna arrays capture abundant solar energy
JACKSONVILLE, Fla. -- Researchers have devised an inexpensive way to
produce plastic sheets containing billions of nanoantennas that
collect heat energy generated by the sun and other sources. The
technology, developed at the U.S. Department of Energy's Idaho
National Laboratory, is the first step toward a solar energy collector
that could be mass-produced on flexible materials.
While methods to convert the energy into usable electricity still need
to be developed, the sheets could one day be manufactured as
lightweight "skins" that power everything from hybrid cars to iPods
with higher efficiency than traditional solar cells, say the
researchers, who report their findings Aug. 13 at the American Society
of Mechanical Engineers 2008 2nd International Conference on Energy
Sustainability in Jacksonville, Fla. The nanoantennas also have the
potential to act as cooling devices that draw waste heat from
buildings or electronics without using electricity.
The nanoantennas target mid-infrared rays, which the Earth
continuously radiates as heat after absorbing energy from the sun
during the day. In contrast, traditional solar cells can only use
visible light, rendering them idle after dark. Infrared radiation is
an especially rich energy source because it also is generated by
industrial processes such as coal-fired plants.
"Every process in our industrial world creates waste heat," says INL
physicist Steven Novack. "It's energy that we just throw away." Novack
led the research team, which included INL engineer Dale Kotter, W.
Dennis Slafer of MicroContinuum, Inc. (Cambridge, Mass.) and Patrick
Pinhero, now at the University of Missouri.
The nanoantennas are tiny gold squares or spirals set in a specially
treated form of polyethylene, a material used in plastic bags. While
others have successfully invented antennas that collect energy from
lower-frequency regions of the electromagnetic spectrum, such as
microwaves, infrared rays have proven more elusive. Part of the reason
is that materials' properties change drastically at high-frequency
wavelengths, Kotter says.
The researchers studied the behavior of various materials -- including
gold, manganese and copper -- under infrared rays and used the
resulting data to build computer models of nanoantennas. They found
that with the right materials, shape and size, the simulated
nanoantennas could harvest up to 92 percent of the energy at infrared
wavelengths.
The team then created real-life prototypes to test their computer
models. First, they used conventional production methods to etch a
silicon wafer with the nanoantenna pattern. The silicon-based
nanoantennas matched the computer simulations, absorbing more than 80
percent of the energy over the intended wavelength range. Next, they
used a stamp-and-repeat process to emboss the nanoantennas on thin
sheets of plastic. While the plastic prototype is still being tested,
initial experiments suggest that it also captures energy at the
expected infrared wavelengths.
The nanoantennas' ability to absorb infrared radiation makes them
promising cooling devices. Since objects give off heat as infrared
rays, the nanoantennas could collect those rays and re-emit the energy
at harmless wavelengths. Such a system could cool down buildings and
computers without the external power source required by
air-conditioners and fans.
But more technological advances are needed before the nanoantennas can
funnel their energy into usable electricity. The infrared rays create
alternating currents in the nanoantennas that oscillate trillions of
times per second, requiring a component called a rectifier to convert
the alternating current to direct current. Today's rectifiers can't
handle such high frequencies. "We need to design nanorectifiers that
go with our nanoantennas," says Kotter, noting that a nanoscale
rectifier would need to be about 1,000 times smaller than current
commercial devices and will require new manufacturing methods. Another
possibility is to develop electrical circuitry that might slow down
the current to usable frequencies.
If these technical hurdles can be overcome, nanoantennas have the
potential to be a cheaper, more efficient alternative to solar cells.
Traditional solar cells rely on a chemical reaction that only works
for up to 20 percent of the visible light they collect. Scientists
have developed more complex solar cells with higher efficiency, but
these models are too expensive for widespread use.
Nanoantennas, on the other hand, can be tweaked to pick up specific
wavelengths depending on their shape and size. This flexibility would
make it possible to create double-sided nanoantenna sheets that
harvest energy from different parts of the sun's spectrum, Novack
says. The team's stamp-and-repeat process could also be extended to
large-scale roll-to-roll manufacturing techniques that could print the
arrays at a rate of several yards per minute. The sheets could
potentially cover building roofs or form the "skin" of consumer
gadgets like cell phones and iPods, providing a continuous and
inexpensive source of renewable energy.
http://www.eurekalert.org/pub_releases/2008-08/dnl-fna080808.php |
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| RHF... |
| Posted: Fri Nov 06, 2009 1:35 pm |
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Guest
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On Sep 24, 5:20am, hab... at (no spam) anony.com (habshi) wrote:
[quote]excerpt
Flexible nanoantenna arrays capture abundant solar energy
[/quote]
If such a device could work one could use it to transfer energy from
one body to another even if both started at the same temperature and
were both in the same insulated box. This can not happen in our
universe. I wonder how they got funding for something that clearly
violates the 2nd law of thermodynamics. Maybe its a cover for some
sort of stealth technology? |
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| nuny at (no spam) bid.nes... |
| Posted: Fri Nov 06, 2009 6:04 pm |
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Guest
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On Sep 22, 12:36am, hab... at (no spam) anony.com (habshi) wrote:
[quote]http://www.bbc.co.uk/iplayer/episode/b00mqjjg/Bang_Goes_the_Theory_Se...
Slide the timer to 24 minutes
It collects the energy the earth loses at night. It has billions of
recievers as infra red wavelength is small and collect energy from all
sources
While chemists are thinking about a paint with embedded nanoreceptors
that catch the sunlight and transform it to electricity, materials
scientists at the Idaho National Labs run by the U.S. Department of
Energy have come up with a plastic with embedded nanoantennas that
catch heat energy and transform it into electricity.
[/quote]
Not going to work, and it has nothing to do with the high frequency.
Don't think of the antenna elements as antennas, think of them as
microphones; devices that convert vibration into electricity. It's
only possible if two elements in the device, when not converting
vibration, maintain a constant distance from each other. Thus, when
excited by external vibration, the maximum excursion they undergo will
be proportional to the maximum conversion possible.
Heat _is_ random molecular vibration; the antenna/microphone
elements, to be resonant at infrared wavelengths, are going to be
molecule-sized. Heat will make them vibrate randomly, meaning maximum
excitation can as easily make them vibrate in-phase as out-of-phase.
Trouble is only out-of-phase excitation produces electrical output.
Any further interest in this is sheer grantology.
Mark L. Fergerson |
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| Androcles... |
| Posted: Fri Nov 06, 2009 7:08 pm |
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Guest
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"RHF" <rhfrist at (no spam) verizon.net> wrote in message
news:291af7df-b9d4-485d-a9de-164f7dbe7602 at (no spam) r3g2000vbi.googlegroups.com...
On Sep 24, 5:20 am, hab... at (no spam) anony.com (habshi) wrote:
[quote]excerpt
Flexible nanoantenna arrays capture abundant solar energy
[/quote]
If such a device could work one could use it to transfer energy from
one body to another even if both started at the same temperature and
were both in the same insulated box. This can not happen in our
universe. I wonder how they got funding for something that clearly
violates the 2nd law of thermodynamics. Maybe its a cover for some
sort of stealth technology?
==============================================
Flexible nanoantenna array:
http://tinyurl.com/yc2hf9s
Maybe it's a cover for some sort of health biology?
Flexible nanoantennae in close-up:
http://tinyurl.com/ycvt55y
If such a device could work one could use it to see.
"Most people would rather die than think; in fact, they do so": Bertrand
Russell. |
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