This
file is a fresh project to gather a summary of
MegaScale AWES*
Start:
http://tinyurl.com/MegaScaleInEnergyKiteSystems
Be not timid; go even beyond utility-scale AWES.
Review the nation-scale AWES
and even the
Whole-earth AWES space.
Project is open and ongoing. Inputs from EVERY stakeholder is invited. All 900+
of you, plus anyone else interested, are invited to send description of
MegaScale AWES.
*Megascale
AWES are potentially able to rate at least 10 MW
per integrated flying unit
without pushing up against any ultimate scaling limits. |
-
Alexander
Bolonkin
- Leonid Goldstein
- Dave Santos
- Message:
10393
- Build, discuss, list:
AWES7039 and its following associated posts.
-
AWES7243 Fabric Scaling. See collection of posts on the topic.
-
Intro toward 45 MW Kite Wind Generator. Document in Italian in PDF format: Here.
-
Large Sailing Ships as MegaScale AWES Similarity Case
- Graham Bell's Cellular Kites
- LadderMill (Doug Selsam's and TUDelft)
- Carousel (1st and 2nd gen concepts)
- OrthoKite Bunch
- SeaAWES? (PierreB)
- Roddy's Rings (Rod Read)
- Doug's Rotor Trains (Doug Selsam)
- Harry Valentine's Winged Cableways
- Grant's Traction Rotor Trains
- Wayne German's "Vertical Blinds"
- KiteLab's Arches and 3D Lattices
- Dr (?) of the Netherlands Offshore Gigawatt-scale AWT
- The Korean Giant Parafoil Ships
- SkySails/KiteShip (displace bunker-diesel)
- Tracks (German NTS?)
- SpiderMill
-
Argatov, Ivan ||
[paper]
-
Khaled
- One common idea emerges- the ganging of many smaller elements into vast
crosslinked arrays.
Exceptions- The Korean variant is based on a single giant parafoil, but such a
wing would be made of many cells.
- Bell developed stick space-frames (now seen everywhere in architecture) for
vast cellular kites, but the rigid mass does not scale. KiteLab has figured out
how to eliminate the sticks.
- DRAFT copy :
Mega-Scale Free-Space Polymer Engineering,
Case Study: Super-Density Kite-Energy Arrays
- Dr.
Beaujean's Serpentine Generator Ring-
-
AWES7367 for Mid-Span Reefing of Megascale Parafoils
- Jong Chul
Kim, Korea. Megascale sea scheme.
- NTS rail
|
Oct. 31, 2012 article:
HERE. Discuss article in replies to
message/AWES7813 |
http://www.x-wind.de/en/index.html
| "The NTS principle" |
-
Huang Jinlun teaches Multi-megawatt
generation kite
-
Megascale Suspension Bridges as engineering similarity model for KiteArch AWE
- "It can be also scaled to much larger power outputs as has been shown in
[30], reaching nominal 100 MW per each installed unit." 30:
Lansdorp B., Ockels W.J.,
Design of a 100 MW laddermill for wind energy generation from 5 km altitude,
Proceedings of 7th World Congress on Recovery, Recycling and Reintegration,
2005.
-
http://tech.groups.yahoo.com/group/AirborneWindEnergy/message/8351
and the thread's following posts.
-
Easy Megascale-Arch Belay-Rotation
- v |
|
Working space:
|
Working:
-
www.energykitesystems.net/CoopIP/index.html
"Super Carousel" AWES with high circumferential velocity issues resolved
Megascale "Spin-Basket"
Persistent Flight Method (Polygonal Cableway Driven) · Kixel, kixels ... MegaScale Rotation-
New Giant Kite Farm Turret Solution ...
www.energykitesystems.net/.../MegaScaleAWEExperimentatio...
Aug 17, 2011 MegaScale Engineering
is engineering on a grand scale. ... is
naturallymegascale,
in at least the tether dimension, on a kilometer scale.
-
www.energykitesystems.net/.../IsotropicKiteConceptPrototype....
The megascale concept
of a pure soft-kite isotropic wing was shown to work at meter-scale, but due
to the crudeness of the untailored triangular playsail, ...
-
www.energykitesystems.net/CoopIP/MegaScaleRotation.html
Mar 10, 2012 MegaScale Rotation-
New Giant Kite Farm Turret Solution. A highly desirable kite farm feature is
to be able to rotate the whole farm as a single ...
You visited this page on 9/15/12
-
www.energykitesystems.net/.../SpinBasketAdvancesIntoAWES...
Apr 7, 2012 Megascale "Spin-Basket"
Persistent Flight Method (Polygonal Cableway Driven). A Spin-basket is a
common sort of hemispherical ...
-
www.energykitesystems.net/.../AdvancedTarpaulinKites.htm
Feb 10, 2012 The
New KiteLab megascale tarp-kite
method is to first create a large rope-loadpath structure in a
desirable kite geometry (like KiteShip's OL), ...
-
www.energykitesystems.net/.../MegaScaleKiteAerogelApps.ht...
Nov 19, 2011 Mega-Scale Kite
Aerogel (MSKA) Apps. Dan'l's recent posts about aerogels and atmospheric
electricity do indeed point toward interesting ...
-
www.energykitesystems.net/.../megascalefreespaceDRAFT.htm...
May 18, 2001 This
report describes the next conceptual frontier of AWE, the aggregating of
capacity to mega-scale by
rigging dense arrays. Rigging with lines ...
You visited this page on 9/15/12.
-
www.energykitesystems.net/0/KITESA/FAQelectric/.../m.html
MA short for MAWE for Megascale AWE, megascale AWECS,
RAD key for Japan: MA http://youtu.be/ChjHqraBj_M · AWE4468 ...
-
www.energykitesystems.net/.../QuasiPlanarIsotropismwithKixe
Feb 20, 2012 It
is proposed that megascale kite
arrays need not rotate to accept wind... If
such a megascale array
is made up of a rope loadpath latticework ...
-
www.energykitesystems.net/.../TrampolineRigAWECS.html
A mega-scale horizontal
membrane stretched like a trampoline between, say, three peaks or masts, will
spontaneously resonate strongly in wind from any ..
-
www.energykitesystems.net/.../TopMegascalingPrinciples.html
May 8, 2011 Smaller megascale kites
can be rotated by "compass belay", but the largest sizes require a radial
line stake-out pattern with phase tracking (Iso ..
-
www.energykitesystems.net/.../LowFlyingAngleMitigation.htm...
Sep 1, 2012 A megascale tensile
fabric of tiny whirligigs is even more radical. ========Bob adds on September
1, 2012: At a guess, the trend to giantism ..
-
www.energykitesystems.net/.../DoubleDrivingAWESTransmiss...
May 13, 2012 It
contains a classic differential gear, and equivalent devices could be quickly
developed at even megascale from
COTS gearsets. This method ...
-
www.energykitesystems.net/CoopIP/LondonEye.html
May 4, 2012 Yes,
the London Eye is in fact a good mechanical model for amegascale AWES
structure because it embodies the highly optimal structure of .
-
www.energykitesystems.net/.../ScalingUpByAerodynamicPoro...
To create megascale kite
structure a fractal scale of porosity is proposed for what is dubbed a "metakite",
a super kite made of a dense array of smaller kite ...
-
www.energykitesystems.net/.../StaticNodesInWingMillHarmon...
Apr 22, 2012 Wayne
German's megascale "Vertical
Blind" concept would in effect do short-cycle "buzzing" rather than
making long majestic tacks across the ...
-
www.energykitesystems.net/.../MegaMaterialsForAWECS.html
Nov 21, 2011 MSKA
(Mega
Scale Kite Aerogel) is a
liquid crystal, and existing condensed matter physics is foundational to
understanding the new science of ...
-
www.energykitesystems.net/.../HiFiBiomimeticKiteFarmModel...
Feb 22, 2012 What
will a megascale kite
or kite farm of the future look like? Many concepts call for a sprawling
pattern of single line AWES, resembling thin ...
-
www.energykitesystems.net/.../IsotropicKitePersistentFlight.ht...Share
Jan 17, 2012 The
significance of this proof is that future megascale arrays
can accept wind from any quarter without having to spin, but merely tilt from ...
-
www.energykitesystems.net/CoopIP/RetrofitPowerPlants.html
Apr 28, 2011 Industrial megascale COTS
components are available for most of the added hardware. Some situations are
more ideal, others marginal.
-
www.energykitesystems.net/.../MultiLinkTethersAndSleevedM...
Nov 21, 2011 The
possibilities are infinite, and extend into 3-D lattices for mega-scalelatticework.
======================== Sleeved Multi-Lines ...
-
www.energykitesystems.net/.../...
Nov 21, 2011 We
now find in the common differential gear found in vehicle axles a COTS
mechanism to do this job at high duty from small to megascale.
-
www.energykitesystems.net/
DRAFT copy : Mega-Scale Free-Space
Polymer Engineering, Case Study: Super-Density Kite-Energy Arrays.
Welcome note =>HERE Today's Kite Energy ...
-
www.energykitesystems.net/WPGA/Members/.../index.html
Sep 29, 2011 Spanning
ordinary turbulence with megascale crosslinked
kite structure is very effective in ordinary conditions. Better imaging and
prediction, ...
-
www.energykitesystems.net/FairIP/RadialKiteArches.html
Jun 4, 2010 Terms
and aspects: Related links: AWES5943. Commentary is welcome: AWES5895 MegaScale Kite-Arch
GeoEngineering Methods.
-
www.energykitesystems.net/CoopIP/IsotropicKiteDemo.html
Mega-Scale Kite Aerogels will
set many new records for engineered gels, including greatest variation in
volume. 21Nov2011 DS; The biggest area unexplored ...
-
www.energykitesystems.net/TodaysAWEIAmember/index.html
NOW featuring: DRAFT copy : Mega-Scale Free-Space
Polymer Engineering, Case Study: Super-Density Kite-Energy Arrays; [ ] March
2011 Popular Mechanics ...
-
www.energykitesystems.net/CoopIP/TACOentry6Feb2012.html
Feb 6, 2012 [KLG
tests all concepts comparatively at small scale, but is known for forward-looking Megascale AWES
schemes. Broad exploration of ...
-
www.energykitesystems.net/.../TetheredAviationConOps.html
Dec 6, 2011 [KLG
tests all concepts comparatively at small scale, but is known for forward-looking Megascale AWES
schemes. Broad exploration of ...
-
[PDF]
www.energykitesystems.net/.../FAAfromAWEIAofUSAchapte...
File Format: PDF/Adobe
Acrobat - Quick
View
Megascale AWES schemes. Broad
exploration of ...... Long
tethers are megascale
structure and caused power blackouts and stopped trains and steamships ...
-
www.energykitesystems.net/Timeline/index.html
The significance of this proof
is that future megascale arrays
can accept wind from any quarter without having to spin, but merely tilt from
veering wind in real ...
|
Working yet:
-
Mothra folder
index
-
How J E Gordon might build an inflated ring of kites
-
Aiming: 500 MW flygen by Dutch group
-
"Pilot Nose" Kite Arch Feature
-
Double-Driving AWES Transmissions
-
London Eye as Mega Bike Wheel Design
-
Role of Static Nodes in a WingMill Harmonic Lattice
-
Rip-Stop Nets for Mega-Tarp Kites or Kixels
-
Advantages and Design Limits of Branched Sleeved Control Lines
-
Megascale "Spin-Basket" Persistent Flight Method (Polygonal Cableway Driven)
-
Kixel, kixels
-
Power Kite "Wind Window" and Kite Arch Catenoid Equated
-
Vertical Shunting Arches- A New AWES Architecture
-
Inverse Figure Eights?
-
Short-Stroke Pumping Notes
-
Displacing fuel and slashing costs- Wind Powered Aviation
-
MegaScale Rotation- New Giant Kite Farm Turret Solution
-
Anchor Circles v. Anchor Grids (review and clarifications)
-
Quasi-Planar Isotropism with Square TarpKites (Kixels)
-
Hi-Fi Biomimetic Kite Farm Model (Shark Gills)
-
Tarp Flying
Tall Ship Inspired Kite Rigs (TarpKite "Square Sail" Concept Video
-
Advanced Tarpaulin Kites (Megascale Rope-Loadpath Method)
-
Solution to FAA-Required Tether Conspicuity for Crosswind AWES
-
Membrane Embedded Ruggedized Turbine
-
Third small prototype of megascale isotropic kite concept
-
Zipline Cableways to Replace Runways for Aviation Launching and Land
-
KitePlane Extreme Variable-Geometry (Rigid-Wing Soft-wing Hybrid)
-
Perpetual Kite Materials Engineering
-
Plucking "Slip-Stick" Line Tug Dynamics
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Pendulum and Dihedral Stability "Myth" Demolished
-
Isotropic Kite in Persistent Flight
-
Wind Dam AWES Architecture
-
Optimal Camber for Dual-Mode (Motor/Generator) Rotors
-
COTS Tarps as Experimental AWES Wings
-
Evolution and Theory of Cellular Kites
-
Smart Weak Links
-
Tethered Aviation ConOps (TACO) final version: Feb. 6, 2012
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Step-Towing Scale-Up //Re: Climbing Kites in Calm CKC
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Three K-Prize Categories (1/10, 1/4, and Full Scale) with User Group Umbrellas
Step-Towing Scale-Up //Re: Climbing Kites in Calm CKC
-
Conductive Tether High Altitude Solution
-
Automated Hanking-On of WECS on Tethers and Assembly of Complex Lattices
-
Integrated Kite-Sailing Fleets (Cloud Sailing)
-
Summary of Methods to Modulate Kite Area for Max Capacity Factor
-
Basic Elements of 3D Kite Lattices
-
Engineered Megamaterial: A New Paradigm?
-
Multi-Link Tethers and Sleeved Multi-Lines
-
Tensile Whippletrees and Double-Driving Differentials (AWECS Methods)
-
AWE and Compressed-Air Power Notes
-
Mega-Scale Kite Aerogel (MSKA) Apps
-
Universal Large AWECS Launching and Landing Method Identified
-
Supercoiling Techniques
-
Solar-energy conversion devices on surfaces of kites, kytoons, aerostats,
blimps, gliders
-
Advantages of Flying Spheres for AWE
-
Spider concept and also Spider Web AWECS concept
-
Cool Salvaged ICE- Junk car or lawn-mower
makes "instant" kite generators
-
Ladder kite
-
GroundGen Reference Standard (GM Voltec Powertrain)
-
"Trampoline" Rig AWECS
-
Shrouded Turbine in a Spinnaker under a Lifter
-
WindTower Kite-Hybrid AWE
-
"Spider-Mill" Dynamics (Review and Update)
-
Testing Persistent Kite Flight by Pumping (Stability Factors)
-
Kite-based Fixed Platform in Calm; "Perpetual" Flight from Two Anchors
-
Pure COTS AWE
-
Convert wind to make sound, etc. Kite Loudspeaker
-
How to make a KiteLab Ducted Turbine APU (RAT)
-
Hot New WingMill Mode
-
Anchoring Giant Paravanes in Ocean Currents
-
MegaScale AWE Experimentation
-
Multi Autogyro Rotors On One Line
-
Rotating Launch and Land Solution
-
Firing, Regulating, and Dousing Looping Foils
-
Passive Cyclic Power-Depower of a LoopingFoil
-
Legs
-
High Altitude Operations notes
-
Power-Out Intermittency Notes
-
NextGen ATC & Kite Farms
-
Curious Ultra-High RPM Rotary Tether Finding
-
Scaling Up by Aerodynamic Porosity
-
Top Megascaling Principles (especially "stake-out")
-
Kite Membrane UV Degradation Solution
-
Looping KitePlane on Leader
-
Radially Pumped Isotropic Kite
-
New AWE Science
-
Kite Hybrid Power Plant (Retrofit Notes)
-
AWE Automation Open-Source?
-
Isotropic Kite Demo (Scale "Large-Array" Model)
-
Winch-tow as an Aviation Basis
-
Single-Tether Multi-AutoGyro (SkyMill-MultiTurbine Hybrid)
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AWE Lightning
-
Low-Tech Dynamic Assembly of Airborne Structure
-
Dynamic Assembly of Large-Scale
Airborne Structure & NextGen SDO
-
Super Density Operations (SDO) of AWECS
-
Seven League Boots/Flying Carpet Hybrid Device
-
METAR Driven Automated Kite Operations
-
Design for Inspection (Aviation
Norms & AWE)
-
Manufacturability- Best Use of Automation in AWE
-
Kite Carousel Mechanical Design
-
Improved Varidrogue
-
Freedom of Tether Angle & Kite
-
Tetherless Dynamic Soaring FEG Method
-
Multi-Agent AWE Control Architectures
-
Spanning Atmospheric Waves with Tethered Foils
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Optimal Crosswind Sweep Cycling
-
Staged Launching & Landing Sequences for Giant KitePlanes
-
Vertical-line AWE methods
-
Unsteady Aerodynamics as a Basis for AWE
-
Low Flying-Angle Mitigation
-
Flying Lattice Arrays- Biomimetic Model
-
Low Density EPP Foam for Crashable AWECS
-
VariDelta: Variable-Drag Delta Kite
-
Enhanced Membrane Wing-Mill
-
Self-Lifting Tethers for High-Altitude Apps
-
Combined Pumping & Reeling
-
Persistent Tether-Driven Flight
-
Tensile-Toys
-
HyperFlags and Rooster-Tails
-
More Gigawatt COTS AWECS : Existing TGV technology
-
Prospecting for SuperWind
-
Cheap Practical AWE
|
Working yet:
-
Helical Wave AWECS (Theory of Operation)
-
AWE Spin-Off/// Surf-Zone Energy Demo
-
Mechanical Filtering of Multiline Control & Power Signals
-
Dynamic Soaring Methods for AWE
-
UltraKite SkyEngine Unveiled
-
Superior Low-tech Crosswind AWECS Solution
-
High-Performance Glider Kiteplanes
-
Wayne German, visionary, latest brainstorm
-
"Ugly Hack"/// Generator Suspended by Twisted Rope
-
Wind Power Land Use Intensity
-
KitePlanes in Passive Dutch-Roll Oscillation
-
Longline Control & XC Shuttling of Sweeping Kites
-
World's First Gondola Turbine Array Demo
-
Vast Aerial Structures Method
based on Ganged Cross-Guyed Mast Clusters
-
Advantages of Nonaxial Wind Turbine
-
Ground-Tether & Cart-Gen Method
-
More RopeWay Wind Power
-
Poor Man's AWECS Turrets
-
Control Engineering for AWE
-
High-wind AWECS
-
Reducing Hard-Automation Risks
-
Merged E-Car & E-Plane Killer App
-
Airborne Levers as Maximal KISS
-
Tri-tether Aerostat Tricks
-
Radial Kite-Arches Maximize Capital, Labor, Land, & Airspace
-
Dense AWE Array Strata
-
Directly Driven Crank Generator Demo
-
Origins & Dynamics
of KitePlanes & Tethered Flying-Wings
-
Analog-To-Digital Kiting
-
Lifter-Kite Overview
-
Ancient Single-Line Kite as a Cybernetic Device
-
Advanced Kite Killing
-
Ground-based AWE Automation with Human Supervision
-
Staged/Cascaded Launch Methods
-
Variable Height Crosswind AWE Arrays
-
Uses of Barrage, Fairing, Nets, Hooks, Grapnels, & Preventers
-
Aggregate Flight Stability with High AirSpace Infill Demonstrated
-
Japanese/Mexican Consortium Develops Mini-AWECS
-
Flying Thicket: GW GroundGen for AWECS FairIP offer;
Wingmill Thicket- Toward Wayne German's "Vertical
Blinds"
-
Lightning Strikes on FlyGen AWECS
-
ToyAWE charger
|
Working yet:
|
Rob,
In the last five years we have made great
conceptual progress toward true Megascale AWES based on fabric wing structure.
This new work builds on the legacy of megascale soft kite pioneers like Domina
Jalbert, Harry Osborne, Dave Culp, Peter Lynn Sr., Dave Gomberg, and many
others. Many of these folks are still actively advancing the art.
No such experts nor their grand discoveries were allowed to influence Near
Zero's "rigid wing favored" scaling conclusion. Megascale soft wing expertise
was even summarily removed from the Expert Panel. Instead, your pessimistic
opinion of fabric wing scaling was cited as if a definitive conclusion (despite
4-0 disagreement with your quoted comment during the panel discussion).
As WindLift publicly stated at AWEC2012, your team is not really a wing-expert
circle (but your mechanical ground design is outstanding). KiteLab Group's R&D
includes advanced rigid AWES wings flown comparatively, and in hybrids, with
soft wings, across all existing scales. We are true AWES wing experts, with
many important innovations developed and tested.
The following fabric-based Megascale AWES ideas have emerged that address every
major concern about fabric wings such as you pose-
1) Either by scaling law or existence-proof, tensile airborne array structure
is the most inherently scalable wing technology. It is the only way to do
gigawatt-unit scaling. The largest wings ever made are cellular or modular soft
kites (>1000 m2). KiteLab Austin's success with its 300 m2 rope-loadpath and
tarp 1/40 scale demonstrator suggests cheap and practical AWE into the km
scale, well within tensile mass scaling-law limits. On the other hand, rigid
airborne structure barely scales to perhaps 100 m wingspan, and capital cost
looks prohibitive. Hull loss risk will remain a deal killer for at least decade
and likely far longer, based on overall aerospace "drone" reliability metrics.
No existing AWES rigid-wing R&D team is likely able to drive this industry-wide
curve down quickly.
2) By "staked out" (multi anchor) arched methods, megascale fabric kite
stability is solved. The Earth itself between spread anchors is the ultimate
rigid "control bar". Graduated porosity is just one of many other low-tech
stability factors to engineer with. Runaway risk is also mitigated by
multi-lines. New methods were developed to rotate arrays. Cascaded launch of
large arrays from a single pilot unit has been shown effective. Single-line
jumbo rigid-wing concepts dependent on complex avionics are much more
operationally and stability-challenged.
3) Megascale actuation is best done by massive industrial ground winches,
rather than expensive super-light aviation-grade actuators with far shorter
lifecycles (<1000hr). Similar logic applies to keeping giant generators on the
ground v flying small generators. Large soft arrays helping drive the largest
legacy generator plants (coal, gas, and hydro) as "Kite Hybrids" is perhaps the
most promising AWES biz model of all. Near Zero failed to understand how
strategic such specific ideas may prove.
4) Simple geometric studies and many actual experiments show that dense arch
arrays use land and airspace at up to 100 times greater intensity than
single-line concepts with a comparable scope requirement. Effective
geoengineering to mitigate adverse climate effects is also far more feasible by
the ultimately more powerful dense-array fabric methods.
5) True crosswind AWE is just as good with soft or hard wings (by power to
airborne-mass). Yes, a comparative soft wing is bigger by wing area and does
not have so high a "TSR" for equivalent power, but is so-o-o much cheaper and
more robust. It is well worth testing both approaches head-to-head in
comparative trials (fly-offs) to help settle the issue.
6) Regulatory certification is based on specific factors such as flight
mass/velocity categories, inspectability, and conspicuity. The FAA has further
cited as key issues runaway crash concerns and airspace utilization
efficiency. Megascale fabric and rope arch concepts seem advantaged in
every such requirement.
These Megascale AWES research findings have plenty of supporting evidence. For
example, KiteLab Ilwaco has tested fabric kites repeatedly in real icing
conditions and found they reliably and continuously shed ice flakes due to
constant flexing, before build up occurs. Other teams validate the same
observations about fabric self-deicing. Lift is destroyed by ice far more
readily with fine rigid-wings, requiring avoidance or expensive added deicing
systems (like inflatable rubber boots or heaters).
To review your soft kite
Cl
return-phase issue:
1) Your logic is based on long-stroke reeling, an early AWES method widely
considered obsolete in the Megascale-AWES study circle. Long-stroke issues
range from poorest airspace usage to high tether wear. A short recovery phase
at the top of a loop or figure-of-eight suffices (short-stroke method).
2) Soft kites offer the most variable-geometry of any wing type, and
therefore the greatest possible control of Cl. Parafoil kites
furl to as little as 1/100 of inflated projected frontal area. Single skin
kites furl even more. These proven modes are available to long-stroke
designers. The gedanken
proof offered you involved a hybrid concept- of a rigid airframe stably
ferrying a far more powerful packed soft kite back along a return-phase.
Purpose-designed AWES along these lines are possible, following the common
example of roller-furling in sailing.
3) All major stability concerns are resolved with multi-anchored
cross-linked arrays. One can even imagine the best of all worlds, a
megascale fabric-based vertical-lift arch hosting aloft large numbers of
smaller rigid wings operating crosswind. Chaos of any part is cancelled by the
bulk array, and the part recovers.
For lack of staff domain-expertise, Near Zero never understood the hybrid array
concept space as a most strategic R&D option, and obviously failed to
comprehend the key importance of so many other current ideas. They
cherry-picked and cooked expert-provided data to fit a novice conception of
AWES scaling possibilities. Only the full range of expert design choices
allows the best R&D allocations.
Your concern that no soft wing AWES is in continuous reliable operation is even
more true for rigid wings. A big reason is simply current experimental
logistics. KiteLab Ilwaco has at least demonstrated continuous reliable
self-operation of small AWES, including up to 40 self-relaunch cycles. No
fabric element has ever worn out, given simple maintenance and quick repair,
despite some kites flown relentlessly for five years. Only session constraints
limited operation. Lets let third-party judged fly-offs determine if complex
brittle rigid wings can really compete with their simple tough fabric
counterparts.
Let me know if any point made here requires more substantiation. I tried to
keep the explanations short, but there is so much more supporting evidence that
could be offered.
Thanks again for elaborating your thoughts on AWES Megascaling theory,
daveS
Thu Sep 27, 2012 |
"Super Carousel" AWES with high circumferential velocity issues resolved
Previous
gigawatt-scale AWES Carousel concepts crowded kites around the
circumference of a giant turntable or circular track. Such affairs would
predictably turn very slowly, even at the periphery, with high potential for
fouled kites. The capital cost of so much mechanical mass was daunting.
An improvement proposed by KiteLab a few years ago was to reduce the original
huge carousel to a far smaller stronger version with a massive vertical
crankshaft receiving tug force from cableways radiating in all directions. Thus
pre-aggregated forces of surrounding kite-array farm cells could sum to
gigawatt-plus scale generation. The compact-carousel distributed-kite approach
also solved the kite crowding/fouling issue.
A bicycle wheel structural geometry was proposed for the compact carousel.
Crank-driven, it would travel at far faster speeds for optimal electrical
generation. A ring of TGV (electric bullet-train) "engines" of about 5MW rated
brake output was conceptually envisioned as the moving rim of the wheel. In
effect this is a giant single generator unit. The limit case then became the
large centrifugal forces in running a train in a tight circle at TGV speeds of
several hundred km per hour. Operational issues like "hot" generator repair and
maintenance were new design hurdles.
The solution is elegant and makes for a far more mature "Super Carousel"
concept- Merely keep the electrical train-ring stationary and let the rotating
carousel be the "moving train track" impinging on the "train wheels" set into
the surrounding stationary generator ring. The circumferentially stationed
generators become easy to access during operations, to bring online or remove.
The moving mass of the required carousel wheel is greatly reduced, easing
design
and capital cost.
The flywheel effect of the still massive high-speed wheel would provide some
inertial stability, but flywheels as such are not really a competitive bulk
grid
storage solution, and the kite cells can be closely managed to match demand. As
Feynman's father famously noted, an electric grid of generators is a virtual
flywheel. One can also drive carousels in motor-mode. Such AWES concepts can
scale well beyond all previous power plant technologies.
Dave S.
27 Sep 2012 |
megascale single-unit concepts |