Hello, Please consider attending and/or helping us spread the word about our 2011 renewable energy workshops. We have a terrific lineup of workshops and are...
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Robert Moskowitz
rgm@...
Jul 14, 2011 4:13 pm
Capability versus Capacity??? Wind turbines are rated at their generating capability at a standard wind speed. If I buy a 10Kw diesel generator and run it out...
28600
Mark S. Mayhew
msm@...
Jul 14, 2011 4:14 pm
Does anyone have any experience with or opinions about the Evance R9000 wind turbine? Their website is www.EvanceWind.com<http://www.EvanceWind.com> Thank...
28601
Doug
dougselsam
Jul 15, 2011 3:24 pm
I think what you're looking for here is a correlation between wind class areas, and capacity factor. Rather than numbering the wind classes 1-7, maybe we...
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Michael Klemen
wind4energy
Jul 15, 2011 5:38 pm
Doug, I would say that the capacity factor of a turbine is more a result of the turbine than the site. If you could make an almost identical turbine, one...
I would like to say everyone is correct. and they are true experts so they should be. The capacity factor is the (simplified) the time the turbine puts out...
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Dave
david43mwright
Jul 18, 2011 1:32 pm
Hi all, There is a factor that this discussion has not been mentioned, well a couple. 1- Maintaince. Since an individual turbine's capacity factor is...
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Ian Woofenden
ianwoofenden
Jul 18, 2011 3:44 pm
I'm not a fan of using capacity factor for small wind. It _might_ be a useful measure for utility scale wind, where _maybe_ turbines are rated at a standard...
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Jon Powers CalWind Re...
calwind@...
Jul 18, 2011 4:55 pm
... Capacity factors are one kind of report card of wind energy conversion. Capacity factors can be gamed by turbine specification I.E. plus sized rotor on...
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Raul Verastegui
raulv@...
Jul 19, 2011 1:45 pm
Hi Doug You analysis of the capacity factor is pretty fair. The energy harvest in one year for a particular wind turbine design is mainly an evaluation of the...
28609
Ian Woofenden
ianwoofenden
Jul 19, 2011 7:48 pm
This message about former list member Bob Petersen is forwarded with ... -- Ian Woofenden, Renewable Energy Author, Speaker, & Consultant 360-770-1520 ...
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Doug
dougselsam
Jul 19, 2011 7:52 pm
Mike K.: Really? OK what's the capacity factor of a Whisper 100? Doug S....
28611
Edward Tsang
et_zapower
Jul 20, 2011 1:35 am
Robert, I believe you are as clear on the topic as when you started. Hope you enjoy the ride. Ed ... -- Edward Tsang, P.Eng., B.Comm. President Zephyr...
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David Raine
dave@...
Jul 20, 2011 1:36 am
Mike, That is not entirely correct. The capacity and/or performance of a turbine is specifically related to two factors: 1. The site conditions and 2. The ...
28613
Michael Klemen
wind4energy
Jul 20, 2011 5:33 pm
Doug, Would you like to put that back into context? You said: "Rather than numbering the wind classes 1-7, maybe we should name them by capacity factor." I...
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Ian Woofenden
ianwoofenden
Jul 20, 2011 7:24 pm
On top of that fine thinking... I'm not a fan of the wind classes anyway. They are too broad. If I ran the circus, I'd like to have the resource measured in...
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Michael Klemen
wind4energy
Jul 20, 2011 8:34 pm
The benefit of the wind classes, however, is that they show you the energy available in the wind, based on a Rayleigh distribution at a given wind speed. So...
28616
Doug
dougselsam
Jul 20, 2011 8:36 pm
David Raines: Here are a couple of pix of local DyoCore installations: http://s1216.photobucket.com/albums/dd378/verticals/ Even on very windy days, I have not...
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Rick
rptopf
Jul 20, 2011 8:39 pm
List, Finally, someone has documented the real advantage of using verical axis machines. It may not be for everyone, but you can see how using several small...
28618
Robert
rwpreus
Jul 21, 2011 5:14 am
I was going to quit this group as it seems to me to be a complete waste, but instead I have decided to see if I can create getting some value out of it. So I...
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Dan Fink
danbob88
Jul 21, 2011 4:40 pm
Rick; I'm afraid you are reading more into the article than is actually there. Those VAWTs in the study and photo are NOT sited on rooftops. From the photo,...
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Raul Verastegui
raulv@...
Jul 21, 2011 4:40 pm
Hi Rick, That is certainly another way of looking at the economics of wind energy capture. The rectangular cross-wind area of a VAWT, is more efficient in the...
28621
Doug
dougselsam
Jul 21, 2011 4:41 pm
Yes and use Whalebumps. And use Maglev. And use Nexwindenergy. And use FLoDesign. And use HelixWind. Then you;ll REALLU have something. One thing I have...
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David Raine
dave@...
Jul 21, 2011 4:42 pm
Now add a bit of solar and you have a very cost effective and excellent solution with the only real viable ROI. However, from a retail standpoint most...
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Doug
dougselsam
Jul 21, 2011 5:36 pm
Hi Mike: Thanks for attempting to correct my statement, but I do not think your statement is true: What you said was: "the capacity factor of a turbine is ... ...
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Mike Bergey
mbergey@...
Jul 21, 2011 5:51 pm
David, Why speculate on whether 4 or 5 roof mounted mini-turbines with their micro-solar arrays might out-produce a $60,000 pole mounted turbine? You have...
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Michael Klemen
wind4energy
Jul 21, 2011 6:02 pm
Doug, Capacity factor is a lousy way to try to compare sites or turbines. From: http://www.ndsu.edu/ndsu/klemen/Wind_Turbines_Home.htm You can see that the...
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David Raine
dave@...
Jul 21, 2011 7:06 pm
Hi Doug, Where you install a turbine is most pinnacle point of its potential for success. Unfortunately companies that often sell turbines do not have the ...
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boB G
bobtransformer
Jul 22, 2011 1:16 am
I thought I had seen this recently.... It looked to me that these videos are actually animations but check for yourself. If so, I haven't seen a movie of them...
