[tt] advanced nanotechnology - 2 new articles
Eugen Leitl
<eugen at leitl.org> on
Fri Oct 5 09:01:06 UTC 2007
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Subject: advanced nanotechnology - 2 new articles
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"[2]advanced nanotechnology" - 2 new articles
1. [3]Carnival of Space Week 23
2. [4]Thermoelectronic potential and status
3. [5]More Recent Articles
4. [6]Search advanced nanotechnology
[7]Carnival of Space Week 23
Welcome to the Carnival of space week 23. We have two articles
inspired by the 50th anniversary of Sputnick, then we have a mixed bag
of articles on raising pigs on Mars, habitable planets, another look
at the Apollo program, Nasa colorizing of space photos, the Carancas
meteorite, Type 1a Supernovae, my own submission on hypersonic
aircraft status, our wonderful planet Earth and there is a formula for
the universe.
[pic?id=5850BEyZzhu*teXWpWRAxfgr02LauvKLXSEWv4xQp5Fd3Ig=&size=m]
Sputnick
[8]Cumbrian Sky talks about [9]Space Age: RIP
As the 50th anniversary of the launch of Sputnik 1 approaches, amateur
astronomer and spaceflight enthusiast Stuart Atkinson has mixed
feelings about what has - and hasn't - happened in the last 50 years,
and wonders if it's time to declare the "Space Age" dead...
[10]Astroprof's Page discusses [11]50 Years Ago
This post is about the 50th anniversary of the launch of Sputnik-1. I
also include a link for a wav of the Sputnik beeping.
UPDATE: Missed article=================
[12]Astroblog also talks about the [13]50th Anniversary of Sputnik
Launch
============================
[14]Colony Worlds talks about
[15]Raising Pigs On Mars
The first explorers upon Mars will probably rely on supplies
previously shipped to the red planet in order to survive upon this
harsh world. But in order to settle on this crimson globe, future
Martians will need to import fruits, vegetables, grain, trees and
pigs--yes pigs.
[16]Centauri Dreams talks about [17]"Habitable Planets: A Splendid
Isolation"
The story discusses recent work on planet formation and suggests
habitable terrestrial worlds may form around stars that have had few
or no interactions with other stars in their past. It's something of a
brake on the idea that Earth-like planets are forming in binary
systems, but it also contradicts recent research that they could
indeed form there. Controversy should follow.
[18]Music of the Spheres talks about [19]Moonshadow Men
FlyingSinger has been busy with travel but did take time to see a
wonderful new documentary about the Apollo program, "In the Shadow of
the Moon." Produced by Ron Howard and in limited theatrical release,
the story is told through recent interviews with ten of the astronauts
who journeyed to the Moon from 1968 to 1972. Inspiring stuff!
[2007-1001marsrock.thumbnail.jpg]
[20]Universe Today talks about
[21]True or False (Color): The Art of Extraterrestrial Photography
If you could see the surface of Mars, or a spectacular nebula with
your own eyes, would it look the same as the beautiful images from
Hubble, or the Mars rovers? Sometimes yes, mostly no. Universe Today
has [22]this
article about the techniques astronomers use to coax the best images
out of their data.
[23]Spacefiles talks about the [24]Carancas meteorite, Peru What have
we learned of the meteorite that fell in Peru on Sept 15, 2007 ?
[crabnebula.jpg]
At [25]Star Stryder talks about
[26]Type 1a Supernovae: A Non-Standard Candle
Astronomers have been working hard to document the universe's rate of
expansion as a function of time. To do this, we have to know how much
light SN give off, and new research is indicating that this is going
to get tricky as we look farther and farther back toward the beginning
of the universe.
[060125-F-2383G-031.JPG]
My own submission is an [27]update and status of hypersonic aircraft
and engine development
Olivier Lussier presents [28]Home Sweet Home: Our Wonderful Earth
posted at [29]olussier.com.
[30]A Babe in the Universe talk about [31]a formula for the universe
An episode of STAR TREK hinted that the whole Universe could be
expressed in a simple equation. Max Planck created a universal system
of units based on c, h and G. Use of Planck's units leads to an
amazingly simple result: "M = R = t"
This expression could tell a lot about the Universe, but may be ahead
of its time.
[32][advancednano?i=CaaE2WdY] [33][advancednano?i=NUMPxIR6]
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[36][advancednano?i=P2V74D4U] [37][advancednano?i=CNGbIEqc]
[38][advancednano?i=yD5dhvW9] [39][advancednano?i=BdVhiAmp]
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[45]Thermoelectronic potential and status
[46]At the current efficiencies of thermoelectric devices, 7 to 8
percent, more than 1.5 billion gallons of diesel could be saved each
year in the U.S. if thermoelectric generators were used on the exhaust
of heavy trucks.
More than 60 percent of the energy that goes into an automotive
combustion cycle is lost, primarily to waste heat through the exhaust
or radiator system.
[1150442746_15d108e33c.jpg?v=0]
[47]del.icio.us
[48]A 24 page powerpoint presentation from 2005 of the Freedomcar and
vehicle technologies program to test waste heat recapture on cars
[49]2007 information on the projects to get thermoelectrics into
commercialization
The Department of Energy's Office of Freedom CAR and Vehicle
Technologies initiated a program 13 years ago with Hi-Z
Technologies to develop a 1 kW thermoelectric generator to either
replace or augment the alternator in Heavy Duty Trucks. This unit
was operated for the equivalent of 500,000 miles on the PACCAR test
track. It demonstrated the feasibility of the concept which helped
justify the competitive procurement to develop a commercially
viable vehicular thermoelectric generator that would improve fuel
economy by 10+ percent. Three teams were selected, 2 for Spark
Ignition Gasoline engine powered autos and 1 for diesel engine
powered heavy duty trucks. BSST teamed with Visteon, BMW and Marlow
is scheduled to introduce their Thermoelectric Generator integrated
into BMW's Model Year 2011 Series 5 cars producing 750 watts.
BSST's parent company, Amerigon, has supplied over 4 million
thermoelectric Climate Control Seats to GM, Ford, Toyota, Nissan,
Hyundai and several other OEM's. They are the largest supplier of
thermoelectric devices in the world. The General Motor's (GM's)
Team includes General Electric (GE), NASA's Jet Propulsion Lab and
the Oak Ridge National Lab. GM is planning to introduce a
production car at the 2010 Detroit Auto Show with a 350 watt
thermoelectric generator. Michigan State University is heading up a
team with the Cummins Engine Company, NASA's Jet Propulsion Lab,
and Tellurix to develop a thermoelectric generator heavy duty truck
to operate on diesel engine exhaust.
Work is under way developing a vehicular thermoelectric air
conditioning/heater system.
[50]Nextreme is a company that makes confetti size thermoelectric
devices
[tech_image002.gif]
Physical size comparison of eTEC centered on standard thermoelectric
cooler
[PowerChart.gif]
[51]A company called Powerchips believe that they can achieve 70-80%
carnot efficiency. This compares very favorably with a Rankine cycle
generator, such as a gas turbine, has a typical Carnot efficiency of
about 30%, while a diesel or gasoline generator is only about 10-15%
efficient in Carnot terms.
Since cars currently waste up to a third of the energy in gasoline
as exhaust heat, using Power Chips to recover a significant
fraction of that power could provide ample electricity for new
systems, and could act as a replacement for existing alternators.
FURTHER READING:
[52]All of the presentations on capturing waste heat at the recent
DEER conference on diesel engine efficiency
[53]TG daily has some coverage of thermoelectrics for cars and trucks
The exhaust on diesel truck stacks can reach temperatures above
600F. This common, easily accessible and available portal provide a
significant differential potential which could be tapped and then
reclaimed as electrical energy. Such energy would be fed back into
the truck in some manner (via a large electrical-assist motor?),
thereby increasing fuel efficiency. Dr. Tritt believes such
technology could save an estimated 1.5 billion dollars annually at
only 7% to 8% efficiency.
[54]Smelters and associated furnaces within the aluminum industry are
generating very large amounts of waste heat, 21 trillion Btu per year.
This waste heat could be converted to electricity in many
industrial processes by using new, high-temperature,
quantum-well-thermoelectric materials. The technology also should
be directly applicable to the recovery of energy losses in the
petroleum refining, chemicals, forest products, iron and steel,
food and beverage, cement, fabricated metals, transportation,
textiles, mining, plastics, aluminum, and glass industries.
[55]16 page agenda of the 13th annual diesel engine efficiency and
emissions research conference (DEER)
[56]All of the conference presentations
[57]Oak Ridge National Laboratory research in 2007 for greater
efficiency in cars and trucks includes thermoelectric. The near term
goal is to capture 10% of the waste heat from a truck.
They are also worknig on overall engine efficiency:
In 2006, 150-horsepower diesel engines for passenger cars had a
41.5% thermal efficiency whereas 400-horsepower diesel engines for
trucks had a 45% thermal efficiency. The DOE thermal efficiency
goals are 45% by 2010 for diesel cars and 55% by 2012 for trucks.
With widespread implementation of new improvements, we could
realize a fuel reduction of 20%.
[58]Directory of thermoelectric generators from PESwiki
[59]Nanowerk reviewed thermoelectrics using custom nanostructured
material
[60]Cars that are more fuel efficient than a Toyota prius now and ones
that will be available soon
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[67][advancednano?i=4uG76O9m] [68][advancednano?i=LitZaEPC]
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More Recent Articles
* [74]Keeping Moore's law going: Intel High-K solution
* [75]IBM on track to make room temperature graphene field-effect
transistors devices
* [76]Chronic disease costs over 1 trillion per year to the US
economy
* [77]Catalysts to stamp nanopatterns with 1 nanometer precision
* [78]Gunships and precision artillery
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----- End forwarded message -----
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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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