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February 2010 |
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http://www.cmnapower.com/
CMNA Power, LLC Craig Varrichio, president and Lead Designer. |
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For more information about the events including speaker line up, agenda
and the full brochure, click on the links below. Offshore Wind Energy Europe Conference, 7-8th April, Radisson Blu Scandinavia Hotel, Copenhagen How to construct, connect and operate a profitable offshore wind farm in Europe Event website: http://www.windenergyupdate.com/wind-conference/ US Wind Turbine Supply Chain Conference, 12-13th April, Wyndham Hotel, Chicago, Illinois Develop powerful strategies to seize your share of the rapidly evolving North American wind turbine manufacturing industry Event website: http://www.windenergyupdate.com/SupplyChainUSA 2nd Annual US Wind Energy Operations and Maintenance Summit April 20-21st, Renaissance Dallas Hotel, Dallas, Texas Develop a robust and cost effective OandM strategy to ensure you dramatically reduce turbine downtime and boost your wind farm's power production Event website: http://www.windenergyupdate.com/OperationsandMaintenanceUSA/ |
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Call for Presentations 2010 Small Wind Conference We are accepting proposals for presentations at the 6th Annual Small Wind Conference, June 15th and 16th, 2010, in Stevens Point, Wisconsin. Presentations should be limited to 15 minutes, with an additional 5 minutes for QandA. Small wind is defined as 1kW up to 100kW. Presentation categories are not yet finalized, pending the responses we get. However, we are seeking presentations in the following areas: o Turbine testing and results, including measurement and verification programs o Wind resource assessment, monitoring, and siting lessons o Case studies of installations and performance o Case studies of installations at schools or educational institutions o Installer issues, including successful and problem installations, and barriers encountered, and how they were resolved o Anything else that might be of value to small wind installers, manufacturers, dealers, public benefits programs, state energy offices, or turbine owners The preference is for "experienced based" presentations with data. Please submit proposals to Mick Sagrillo at mick@smallwindconference.com by February 12th. The proposals will go to the advisory committee for discussion and decision. Decisions will be made on presentations in a few weeks so presenters have adequate time to prepare their presentations. Presentations proposals submitted for other renewable energy conferences will be considered. Anyone interested in sponsoring or exhibiting at the Small Wind Conference should contact Samantha at Windustry at 612-870-3474 or samantha@windustry.org The Small Wind Conference Coordinating Committee Roy Butler Trudy Forsyth Jenny Heinzen Mick Sagrillo |
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Lines rigged with connectors, swivels, and other small tackle can generally be wound onto a reel without problems particularly if the fittings are small and smooth and tension is moderate. Siderigged gear on a line can even be taken up, perhaps onto sidetrack space on the spool. Notches in a spool wall facilitate sidetracking. Limit stops and varied sensor targets (magnetic, optical, etc.) on a line enable precise winch/reel automation. Line length and reel revolution counters provide a more general state picture. Extra line is commonly stored on a working reel. As leader sections wear they are trimmed and new line wound out. Selecting motive power for winches follows a well established pattern across scale. Without going into explanation, at the tiny scale electrostatic motors are favored, at mini to medium scale human-power or direct electric (gear) motor driving is good, at medium scale pneumatic actuation is practical, and at the largest scale hydraulic power is a sound choice. An electric motor driven compression stage is common for the last two fluid power scales, but direct kite power compression could serve. Tensioners of many kinds are a common line
handling expedient. Backlash snarls of slack line at the kite reel have
been addressed by Peter Lynn (Sr.) with a small water flow in a tube that
extrudes line slack. Compressed air may be desirable. Hacker Tip- A reel made from a wheel rim can be walled up for high capacity by taking the tire, splitting it around the circumference and mounting the sidewalls crossed inside-out back onto the rim. CoopIP 4feb2010M1064 |
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What is that CoopIP? ==> C | |||||||
Rotary
electric machines. Linear electric machines. Linear actuators. |
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http://wstiac.alionscience.com/pdf/AQV4N1_ART06.pdf
Megawatt electric power systems (MEPS) airborne: How might these be considered in a high altitude wind energy mining (HAWEM) operation? The fly-gen generator part
receiving special attention: Getting power generated per pound or kg seems to be a
target of the US Air Force. [[hyperconductors are not quite superconductors]] |
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Link to Heronemus Windship: http://www.phoenixprojectfoundation.us/uploads/Phoenix_Project_Paper.pdf Professor William Heronemus |
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Inventors:
Uzi
Ezra Havosha
Gal
Pri-Paz
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HyperFlags and Rooster-Tails As it turns out, sequentially synchronous "firing" of multiple membrane wing-mills is a simple and easy AWE method. A key synch pattern is to fire three wings in rotation, pulling on three lines in turn (ADCABCABC...). This action will drive a triple crankshaft on the ground, just as Lloyd long ago disclosed. The new trick is to array wingmills along a pilot line downwind where the leading wing's oscillation sets up a wave that flows in turn to the next wing in line, and so on. It looks like a waving rooster tail hung upside down. Consider a flag where the flapping wave starts at the pole and propagates downwind. A flogging headsail acts the same way: the tensile continuity of the fabric reliably acts as a waveguide. Further imagine that the flag is skeletonized into a herringbone pattern of ribbon wings and you have a "hyperflag." I made some this morning and observed highly enhanced oscillation with much less material. To tap this motion lines are rigged (and tuned) from the lower wingtips in phase to a conventional (ideally COTS) crankshaft. See the many old KiteLab posts on membrane wing-mills for important practical details. CoopIP |
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Tensile-Toys™ The quest for cheap AWE has given us a modular engineering language based on tensile force. Of the endless applications education is basic. Many an engineer enjoyed early intellectual stimulation form mechanical systems like Tinker Toys, Erector Sets, or Lego Robotics. Sadly such "rich-kid" resources are often out of reach to the economically disadvantaged, but as low cost tensile engineering drives revolutionary invention, a cheap modular system of tensile elements is potentially an educational super-toy for all. The fundamental element of this curriculum is string, already a highly developed resource in folk toy traditions that nurture spatial perception and dexterity. The study of string structures and knots stimulates mathematical intelligence, from geometry to topology and even, well, knot theory. Kiting and fishing are quintessential string tech. An key tool is the larkshead knot, a loop mated to a stopper knot, allowing strings to connect and disconnect at will, without added parts. A few powerful knots enable infinitely varied tensile devices. An educational kit suitable for a child or class room is possible at a cost of pennies to a dollar or two. Assorted string and elastomer, a few swivels, membrane material, micro pulleys, adhesive, and a few spars is enough for amazing feats even exceeding the expensive kits. Kites, string instruments, and endless contraptions are core activities. One major advantage of Tensile Toys is how large scale structures are possible "for a song." Inspired instructions and examples are essential to unleash the creative potential of these simple materials. The latest understanding of tensile engineering, of tensegrity, tensarity, and so on, is needed to properly imagine this new educational tool. The string must be specified within safe breaking strengths and is best biodegradable. A continuum of string tools from a toy "micro" scale to the largest engineering scales is a fantastic toolbox. Primary compressive structures for Tensile Toys are borrowed from ambient structures like trees, buildings, and terrain. Anchors such as ribbon/belting, simple hooks, etc., are used to interface the tensile elements to the world. String spider connectors serve as hub pieces much like Tinker Toys. Complex 3D lattices of string can do wonders as yet unimagined. Let the children play. CoopIP [larkshead knot, larks head knot, lark's head knot] |
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Not
sure whether the instructor achieved aims or not, but this matter would
come into question when one is planning multiple lifted turbines:
Discussion is invited.
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Tethered Wind Transducers TWT |
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The final finishing surface treatment of tethers and kite part surfaces may be of material quite distinct from the structural interior of the parts. Optimizing AWECS will invite engineering the final surface treatments. Maintenance of a system will concern with surfaces finishes. Moisture barriers, UV barriers, insulation barriers, colorization, conductivity, etc. are some of the concerns that invite surface treatments. Smoothness, roughness? Photovoltaic surface? Heating? Cooling? Signal carrier? Hazard colorization patterns? Message-holding? Every material has its final surface structure and chemical makeup; just what that final surface does to the efficiency of the system for the system's full life is something to be known and respected. Surfaces decay, but ever a final surface is extant; the timed changes in a surface finish is a matter of concern. During gross exploration and design of AWECS, surface finishing may take fairly a distant seat to large assembly design features. Surfaces meet the weather, air flow, atmospheric moisture, rubbings, microbes, dust, air pollutants, cosmic rays, handling oils, and sun rays. The surface is a very active environment. CoopIP jpf 15Feb2010 | |||||||
Working kite, work kite, working kites. Working Kite Association (WKA) Such an association has yet to form, so this is a proposal among many.. Kites (mooring, tether, main interaction body) already work to convert wind energy to mechanical energy that results in the kite self-sustaining up in the air (or water for water kites or paravanes). However, the emphasis that the kite system is employed to do tasks beyond the first action of converting wind energy to mechanical energy. Use a kite to do a task and thereby have the kite win the title of being a "work kite" or "working kite." | |||||||
Dr. Kim Jongchul and his work toward
seawind use of wind at 1481 m ASL for parafoiled tracted ships that would
generate energy to supplant the world's needs for energy. See his
papers for sure.
M1157 Wind power generation with a parawing on ships, a proposal J. Kim a, C. Park b,* a Korea Aerospace Research Institute, 45 Eoeun-dong, Yuseong-gu, Daejeon, Republic of Korea b Korea Advanced Institute of Science and Technology, Department of Aerospace Engineering, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 Korea, Republic of Korea = Kim JC, Song JH, Oh KR,
Song BS. ‘‘Novel Power Generation System Using Wind Energy at High
Altitude,’’ paper presented at the Fall, Conference of Korean Society for
Aeronautical and Space Sciences. 2007. |
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T.W. Bennett T.W., Roy Fox, Jr.. Design, development and flight testing of the NASA X-38 7,500 ft2 parafoil recovery system. | |||||||
Google’s resident “green energy
czar,” Bill
Weihl said in a QandA last month- "The other one (alt energy) that we’re looking at is high-altitude wind — ways to capture the stronger and steadier winds that are at 500 or 1,000 or 2,000 meters high, or potentially even up in the jet stream. Internally, we’ve been looking at taking traditional wind turbines and putting them on much taller towers so you can get to much stronger steadier winds. Today, with the way people build towers, it would cost a lot more to go up to 200 meters compared to the usual 80 meters. We’ve been looking at some ideas that would let you go up and build a turbine at 200 meters at very little extra cost. If that pans out, it would be a way to knock 20 or 30 percent off the cost of wind, and wind is pretty close to the cost of coal today. We’ve also invested in a company called Makani Power that is doing high-altitude wind using an airborne platform. They’ve been looking at using a kite or a wing under autonomous control, where the wind pulls the kite out and you change the angle of attack so you can wheel it back in at less cost than the energy would make going out. The other approach is to use some kind of wing with propellers on it and the generators on the wing. So you’re flying a kite through the wind and it’s making the propeller spin so it’s acting like a wind turbine, and then you have to get the power down the cable back to the ground. There are other companies in that space with some similar ideas." SEE FULL INTERVIEW NY Times ================ Analysis: Because of the corporate secrecy involved the clues are faint and uncertain- Makani has been purged from Goggle's alternative energy front pages and Bill refers to the investment in the past tense. Makani is known to have had its Google funding cut. A major change is the acknowledgment that there are other AWE companies that they are following. Google is unlikely to reinvent the tower in any fundamental way. Perhaps guyed masts are envisioned. ds Discussion is open:
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Coming tether note by DS | |||||||
In water, air, and other fluids Related news that have aspects that may be affecting the growth of airborne wind energy conversion systems:
tether technology,
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Serving all 10 scales of airborne wind energy.
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Want to donate regarding your former
experience with us JoeF, Ad: Want a vacation in Oahu, Hawaii? Fly kites, surf great waves, rest, recover? |
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More Gigawatt COTS AWE Existing
TGV
technology
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The magic of a tether is how great
tensile force is transmissible between points with minimal mass and
cost. Kites————for
most AWE————critically depend on tethers
to convey reaction between the surface and the wind flow-field.
Phonon
(virtual particle) theory is an atomic-scale quantum explanation of how
kiteline "tug" transmits force over distance. Model a single bond in a
kiteline molecule can quantify how much tug is phonon transfer and how
much energy dissipates as convective and radiative energy for total
thermodynamic transmission efficiency. At macroscales most kiteline
behavior is better characterized by classical mechanics of waves in a
physical medium (stress-waves) although atomic properties still influence
critical behavior. In fact, phonons and stress waves are merely
different views of the same solid-state physics. Electron transmission,
the basis of many AWE schemes, is discussed downpage. Electrical failure mode of a tether is important:
If the circuit opens, then the load gets spiked and the turbine might
overspeed. If the circuit is shorted, then the flygen will brake
suddenly, possibly burning out and breaking turbine blades. Conductive
tethers are considerable hazards around power lines and lightning. In
non-saline atmosphere, polymer tethers are not direct shock/short hazards
when downed on power lines and are not a major lightning risk. Redaction on February 28, 2010 in group forum: Tethers are
like powerful magic for transmitting great tensile force between points
with minimal mass & cost. AWE kites depend on tethers to convey Newtonian
reaction between the ground & wind. Most kiteline dynamics is well
described by classical mechanics of waves in a physical medium
(stress-waves). Phonon (virtual particle) theory is the atomic scale
quantum explanation of kiteline "tug". In fact phonons & stress waves are
merely different views of the same solid-state physics. Electron transfer
is the added basis of conductive AWE tethers. Note: the above two versions are being evolved in the following place: Tethers [ Temporarily, this is in subscription folder: Access: AWE Sector] "The magic of a tether is how great tensile force is transmissible between points with minimal mass and cost. " Notice: There are two versions of the article; each version has interesting gems; the two versions are presented side-by-side HERE. |
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NTS Nature Transport System Ref1 | |||||||
Transport goods and people on rail while charging huge batteries. Not only do the goods and people get to destinations, but at the end there is a won lot of energy. Do this by using kite systems on land or water. | |||||||
PPPM
Tether? Tendon? |