Geoff, Thanks for the detailed comments about power loss along cables. I am well aware of the problem but I am not sure all installers are or perhaps some...
Hi Nando, I have combined your two messages into one for reply. You and I agree, as well as many others in the small wind industry, that inverters should not...
I usually suggest folks use the wire size calculator at the bottom of http://www.powerstream.com/Wire_Size.htm Steve Spence http://www.green-trust.org Sign up...
Mel: With the parameters you indicate the GridTek10 can be controlled with a simple proportional Ballast Controller with a single IGBT and a 14 or so KW load (...
Nando
nando37@...
Jun 1, 2008 7:05 pm
91
This DOES seem like a silly "feature".....I should at least be able to turn off the "manual reset" feature. Poor design indeed. ===============================...
Mel: Adding to the thread, if the Ballast Dump controller is included, and the GRID drops, the wind mill continue producing power into the ballast, therefore...
Nando
nando37@...
Jun 1, 2008 7:07 pm
93
Nando, I would personally be willing to try your solution. However, it would be best to do this thru Mike Bergey. You should contact him directly. He has never...
My trace c60 makes a decent controller for our wind turbines. Of course, we only charge batteries, and are not doing gridtie. completely automatic diversion...
Mel: I went to the Bergy site and checked the wind mill, it seems that can produce up to 15 KW, this depending on how the "autofurling" system works -- . ...
Nando
nando37@...
Jun 1, 2008 7:37 pm
96
Steve: The C60 is just a switch to connect the wind mill directly to the battery and once the battery is charged starts to PWM at around 300 Hz to pulse the...
Nando
nando37@...
Jun 1, 2008 7:42 pm
97
I know. Since I don't do grid tie, it works for me. If I wanted to do grid tie, I'd do it in my inverter, not my charge controller. My wind turbines are not...
To SWIEP members: Here is a preview of a message I will post on AWEA once the moderator returns. Currently the unmoderated AWEA site is a mess so I think I...
I have had some time to take a closer look at the Cadmus Group report submitted to the MTC, i.e., the agency that provides incentive $ for small wind turbines...
Hi John, Thanks for your comments. Actually my home is not too far from you (Ellenburg, NY, 45 miles S of Montreal). That is where my turbine is. My working...
Hi to everyone, I posted a statement that turns out to be inaccurate. So I apologize to Mike Klemen. I asked Mike to revise it to the wording he wanted before...
Hi John, I forgot to ask in my previous reply: Are you located at a University? If not at what kind of site did you propose to do the research in your ...
Roger and Doug, Thanks to both of you! Doug in particular has always been wonderful at writing detailed replies. So has Mike Klemen hence I apologize for...
Hi Mel, The organization that is trying to put up the wind towers in Nantucket Sound has had a test tower in the Sound for a number years now. Their site is:...
Doug, I think it would be a good idea to check out the Alfred University study before you try to criticize it. I do see some fault with it (not enough...
Steve & Doug, So I don't get it. Are you saying you are so sure you are right there is no point doing a test? Have you ANY data to show the industry standard...
Hi Roy, Yep, I agree the Cadmus Report does not reach any wonderful conclusions partly because the report is preliminary. That is why I did the statistical...
I don't understand, Mel. The basic thrust of Doug's post was "if there's not enough wind you won't get the power that is estimated". As near as I can determine...
We rate our wind turbines at observed power at 28mph. We mount the turbine in the back of a truck, drive at 28mph, and put a 1000 watt load on the turbine....
Doug, You attacked the Cadmus Group report on the basis that turbines are anemometers. The basis of the argument is that turbines are anemometers and hence if...
This is the reason we use an AIR X and a Trimetric as a data logging anemometer, as the result will be much closer to actual performance data for our wind...
I forgot to mention one thing in my last message. In NREL data a Bergey turbine looks kind of like an anemometer, but not a monotonic anemometer. Why? Because...
Ed, I am saying that you cannot detach the site from the power estimate. I must not have made it clear if an expert like you missed my point. Sorry about that....
I sent out my last message and just 1 second later received permission to reveal my source. Read below. Prof. Mel Tyree Professor Department of Renewable...
Mike, I also have to point out that the 'manufacturer's power curve' in these reports is unlikely to be correct. I don't know where they go it from but it is...
Ed, I also want to correct another issue. I do not have issue with the manufacturers. I talk about an 'industry standard model' but so far I have no idea where...
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