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31672

Re: More bad characteristics of Vertical-Axis

Good point Jon Ricker: The point that a "vertical-axis" turbine (or the same configuration set horizontally), like a SuperTurbine (multi-rotor
Doug Selsam
Apr 29
#31672
 
31671

Re: More bad characteristics of Vertical-Axis

I agree with Doug with his great explanations and observations. The only VAWT that showed hope was a high aspect ratio version which I worked on years ago. If
JonRicker@...
Apr 29
#31671
 
31670

More bad characteristics of Vertical-Axis

Ok so we've already covered: 1) Sweeping 3.14 times the intercepted area, versus a propeller sweeping its intercepted area. Stated another way, that means the
Doug Selsam
Apr 27
#31670
 
31669

Re: VAWT recommendation (run-away!)

Answering questions: "Why is efficiency even an issue with either a vertical or horizontal machine? The wind is inexhaustible, and is available at zero cost."
Doug Selsam
Apr 27
#31669
 
31668

Re: VAWT recommendation (run-away!)

Gene, I want to seriously encourage you to follow Mike Bergey's advice and read the articles on the link that he provided and/or get the book. Some questions
cor_van_de_water
Apr 26
#31668
 
31667

Re: Show us an example

See https://www.quora.com/What-is-the-most-productive-commercial-VAWT-wind-turbine for some useful comments. Frank Leslie ________________________________
Frank Leslie
Apr 26
#31667
 
31666

Show us an example

All the world needs to see is *a single example* of a vertical-axis turbine, mounted in a built urban environment, making good power. That's all. We had a
Doug Selsam
Apr 25
#31666
 
31665

Re: VAWT recommendation (run-away!)

Hi Gene, Roof mounting is not a good idea, and has rarely if ever proved to be productive and successful for the long term. 1. There is not much energy there,
Ian Woofenden
Apr 25
#31665
 
31664

Re: VAWT recommendation (run-away!)

Why is efficiency even an issue with either a vertical or horizontal machine? The wind is inexhaustible, and is available at zero cost. It seems to me trying
genothegreat2003
Apr 25
#31664
 
31663

Re: VAWT recommendation (run-away!)

Jay, That is a fine collection of unfounded and disproven attributes of VAWT’s. I recommend that you do some homework and learn where the naysayers get
Mike Bergey
Apr 25
#31663
 
31662

Re: VAWT recommendation (run-away!)

Has anybody ever tried to make the argument that VAWT's are as "efficient" (ie. kw for a given wind speed) as HAWT's? Duh indeed. That however is not the only
Jay
Apr 24
#31662
 
31661

Re: VAWT recommendation (run-away!)

Common sense simply says that a VAWT cannot possibly be as efficient as a horizontal turbine simply because the blades in a VAWT spend HALF their time
Robert Bruninga
Apr 24
#31661
 
31660

Re: VAWT recommendation

I have none avaialble here in the USA that I could recommend. The UGE turbine in front of my school is now there as yard art and makes a "striking visual
Dan Fink
Apr 24
#31660
 
31659

Re: VAWT recommendation

I'll second Randy's comments on Verticals... Best Regards, Dave Merrill SunAir Systems LLC NABCEP, Certified Solar Installer (815) 234-2530 (815) 262-2831
Dave Merrill
Apr 23
#31659
 
31658

Re: VAWT recommendation

Hi Gary and Randy, There are two small-scale VAWTs that certified internationally and applicable for FiT program in their respective countries.qr5 certified in
Henry Kurniadi
Apr 23
#31658
 
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