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USVAWT Testing Posted by: LynxSteam
Video duration: 149 seconds Global video hits: 1518 The newest alternator has 120 turns 20 gauge wire. 4.5 Lbs of copper in the 9" diameter alternator by USVAWT. Testing to confirm computer simulations. RPM at cutin to a 24 volt load spot on at 190-195 rpm. The 3 x 3 NACA 0020 blades are about 35%-40% efficient. The alternator is about 95% efficient at this rpm. About as good as it will get. Related: wind, turbine, gti, grid, tie, inverter, lynx, steam, permanent, magnet, alternator Display Video Comments | Hide Video Comments | Add Comment |
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More VAWT Experiments Posted by: sjh7132
Video duration: 580 seconds Global video hits: 954 This video show experiments I did with various VAWT configurations. Related: vawt, wind, turbine, free, energy, engineering, science, air, foil, s1223, naca, 0020, power Display Video Comments | Hide Video Comments | Add Comment |
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Simulating VAWT Startup Posted by: sjh7132
Video duration: 297 seconds Global video hits: 1808 This video shows a new software tool I wrote that lets me simulate and check for VAWT startup problems. Related: sience, free, energy, vawt, turbine, wind, startup, power, naca0020, s1223 Display Video Comments | Hide Video Comments | Add Comment |
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Testing on the pole Posted by: sjh7132
Video duration: 215 seconds Global video hits: 769 This is the 3rd part of testing my VAWT, this time on the pole. Power was not impressive, but I think that may be the fault of my alternator which has a huge air gap and high resistance coils. Related: wind, turbine, vawt, free, power, science, engineering, alternator, naca0020, naca, lift, danarious Display Video Comments | Hide Video Comments | Add Comment |
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Sustainable Living - LTU Posted by: ggewers
Video duration: 50 seconds Global video hits: 240 Project in sustainable living, LTU (Luleĺ University of technology) Spring 2010 by Andre Söderlund, Gustav Gewers, Petrus Gedda, Daniel Risberg, Anders Pettersson Related: vindkraftverk, windpower, windpowerplant, savonious, naca0020, ltu, turbine, helix Display Video Comments | Hide Video Comments | Add Comment |
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Rotor de cuatro palas II Posted by: dositeo57
Video duration: 41 seconds Global video hits: 117 Probando rotor con palas de perfil NACA 0020 y 75 cm de diámetro. Related: rotor, de, prueba, ii Display Video Comments | Hide Video Comments | Add Comment |
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Darrieus H-Rotor Heilderberg Posted by: Yaaroslav
Video duration: 209 seconds Global video hits: 982 ?????!!! COOL!!!! NACA 0015-0020 Related: darrieus, windmill, heiderberg, green power, alternative evergy, vawt Display Video Comments | Hide Video Comments | Add Comment |
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naca 20 wings on a Vawt Posted by: wiboater4
Video duration: 149 seconds Global video hits: 430 I replaced my Lenz wings with these Naca 20 wings to see if getting more RPM's would give me better charging in lighter winds. I only switched the bottom wings in this video to try them. The top section is tied off so it won't turn. They do give me higher RPM's but my alternator match is not right for getting decent amount of Watts out of this for now. Related: foam wing turbine, vawt, wind turbine Display Video Comments | Hide Video Comments | Add Comment |
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Crazy Darrieus windmill H-Rotor Vawt Posted by: Yaaroslav
Video duration: 196 seconds Global video hits: 545 NACA 0015-0020 Wacht the video and enjoy the music!!!! Related: darrieus, windmill, h-rotor, vawt, green, power, alternative, energy Display Video Comments | Hide Video Comments | Add Comment |
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:: Videos are copyright their respective owners :: Design by: Css
:: Videos are copyright their respective owners :: Design by: Css
Latest comments made on this video:
By: LynxSteam. on 12 Feb 11, 14:21:38
@haystack29 Thanks, the alt weighs 18 Lbs. This turbine is a bit small for this alternator. We are going to do two things. 1. Design a less expensive alternator for entry? level fun. 2. Design larger turbines to match these high output alternators.
By: LynxSteam. on 12 Feb 11, 14:19:14
@sosweetsan Its about as efficient as possible due? to physics. This turbine is a bit small for the alternator. We had originally targeted for 50 watts at 20-30 mph wind speed. We overshot our goals for the alts by a lot. A better size turbine would be 3'D x 6'H, sort of like a mini Winspire.
By: haystack29. on 12 Feb 11, 05:03:40
Hey marcus,Those alternators are great.Big power at a small size.How much do they weigh? It is nice to see? someone thinking, the smaller and more efficent the better.after all no neighbor wants to see some big ... windmill that makes all kinds of noise. Great work man!
By: sosweetsan. on 12 Feb 11, 04:40:29
hats off mr.marcus, i wonder at 12mph, 25Watt is sufficient? can? the genny size be increased? could it be possible for you to make 300watt?
By: LynxSteam. on 11 Feb 11, 13:26:20
@MrHorsetail I have tried many different blades. ? My suggestion is to use a symetrical blade between 0017-0020. Solidity of 50%, MP around 34%. AOA 8 degrees. Exotic blades don't perform better than flat plates or simple symetrical.
By: LynxSteam. on 11 Feb 11, 13:24:01
@TheLiliacus That's? exactly what we did here. We wind the large coil and pull a loop out at 60 turns, then wind another 60 turns. Mark the start and end wires. This turbine would be better with 3 loops pulled at 40 turns. It would lower resistance more and allow for higher rpm. Its quite a challenge to sort all the wires out.
By: TheLiliacus. on 11 Feb 11, 10:39:50
@LynxSteam: Nice work with the alternators and turbines. I'm on my way to? make a serpentine coil alt. and i have a question: What if i make 60 turns with 2x20awg wire instead of 120 turns with 20awg wire? The wind in my area (Bucharest, Romania) is kind of low in speed.
By: Fearlessthinker. on 11 Feb 11, 09:10:00
@LynxSteam The poor-man's wind tunnel method is to hoist it up on a rig above a pick-up truck and drive down a long? road in calm air while capturing MPH with GPS and V/A into a resistiive load (preferred) or battery bank with a logger of some type. The poor-man's logger can be a video camera showing volts and amps on 2 meters and the GPS readout all in the same frame as you drive down the road. Evidence shows that real-world wind results will at least meet the numbers found in the truck test.
By: LynxSteam. on 11 Feb 11, 01:15:56
@Fearlessthinker I wish i had a wind tunnel, I would have finished this project months ago. I can do a resistor load,? but I was interested in real situation 24V battery and GTI. I'll let my partner do the science, I just make sure things go around. I don't know where I'll find 30 mph. Now I'm thinking this baby would look good 3'D x 6' H, sort of a mini Windspire. One of my turbines broke loose of the GTI load, shot up 35-45-50 volts before I could disconnect. No damage to the GTI - whew!
By: rikkiesix. on 10 Feb 11, 23:11:05
Look at it go man. yay I love it Thats truely great? stuff. Keep it up guys Greetings from across the ocean Erik
By: Fearlessthinker. on 10 Feb 11, 22:39:28
Did you use a resistor load and is there any way to draw a power curve up to? 30mph yet? Congrats on the optimized design.
By: MrHorsetail. on 10 Feb 11, 20:51:07
That thing works great. That's the kind of blade system I'd like to make someday I think they're the neatest. I wonder what blade system works the best.?