REGARDING performance of new and improved wind turbine blades. Here is a copy of my response in the AWEA Yahoo! Group: I respectfully disagree with Mike...
Update to 18 SWIEP members, First let me thank the 18 people who joined SWIEP. Thanks for taking the time to find me. So far the only way you know about me is...
NEWS: Update, my comments about Mike Bergey's new blades finally got posted on the AWEA Yahoo! Group. Censorship (if there was any) can be overcome! More...
Nando, Thanks so much. I want to investigate options. This is difficult to do without knowing a lot of technical information about how the GridTek10 works. Do...
Steven, I have been looking into alternatives. Most inverters have to be sized and designed to work with a specific turbine. I know of two other inverters that...
Nando, By all means, please contact Mike Bergey. He is tired of hearing from me, and I have never had a satisfactory exchange of technical information with...
I'm certainly no electrical engineer, but I don't see why a given inverter has to be "adjusted" to work with a specific turbine. What are they tweaking for? ...
Steven, I have looked in moderate detail at the specs for the WindyBoy. It expects DC volts in to be within an expected V and power (kW) range. So you would...
Mike, Thanks for telling me that. Can you give me a reference (book or journal paper) that explains how one can maximize Cp? I had assumed Cp was determined...
And what is "Cp"? ... From: Mike Hess To: SWIEP@yahoogroups.com Sent: Wednesday, April 09, 2008 7:04 PM Subject: RE: [SWIEP] Re: [a-w-h] A few comments about...
Hearing what you are saying seems to explain the noise. My educated guess is that the IGBTs fire out a pattern of pulses, varying in voltage to make a stepped...
Doug, I never did get a diagnosis of the problem from Bergey or the installer. You know in modern electronics with complex 'motherboards' it is cheaper to just...
Cp is the measure of the efficiency that the turbine has in taking power from the wind. The integration of the inverter, generator and the rotor is crucial to...
Best book is Paul Gipes book on Wind.been around a long time but covers all the basics.here is a good site that explains in detail including all the generator...
I looked it up: power = 0.2 x density of air x area of sweep x Cp x wind velocity cubed. ... power ... rotor is ... Cp X wind velocity cubed. Hope this helps,...
MESSAGE FROM MODERATOR This group is also intended for owners of wind turbines to pass on non- technical comments about your system. How do you like it? How do...
... Paul, Thanks so much for you input. I agree, any good company will continuously improve their products and Bergey is no exception. PLEASE CONSIDER KEEPING...
Hmmmm....thank you. I thought these puppies were more, I dunno, "modular" than that. I can see how this tuning is important though. Steve ... From: Mike Hess ...
Doug, Yes, I am taking your suggestion seriously. PAST HISTORY: I have suggested to SED (the installers) and Mike Bergey that there are two possible causes of...
Hi Mel and all, We had a great wind day here yesterday. 151.9 KWH in 24 hours according to my data logger. I don't have an anemometer but the history from...
Hi Paul, Thanks for your continued interest. (Are you an installer or customer of Bergeys?) Good stuff; keep me posted on results. If your GridTek10 does not...
Tom, What you say below is about what I have figured out from the GridTek10 manual that gives some circuit details. I am in contact with people who sell Aurora...
Thanks Matt! It sounds like the problem might have already been addressed with the newer Gridtek tweaks that folks have talked about. I confess I'm still...
I would caution you about accepting someone's 'word' that the problem has been tweaked. Mike Bergey told me the GridTek10 cannot be improved. 'I have been...
Dave, I would agree that should work, but it would not give me a power curve, i.e., power vs wind velocity. NREL doesn't seem to do it that way either. One of...
I'm afraid I don't know what a "Magnatek" is. The industry may well currently require inverters that are matched to the turbine, but that's (IMO) a sign of an...
Steve, So who has been telling you that the Gridteks have been improved? Since when, and where is the proof? If I could find a better Gridtek I would buy it!...
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