Salt penetration into concrete rusts the re-bars, which then expand with rust and spall the concrete. This is common in the porches of beachside condos. Frank...
Hello everyone, Can anyone tell me if there is a controller available, or if someone has successfully designed one, for a Wind turbine for heating purposes....
I am contemplating constructing a new guyed pipe & ginpole tower (60' probably) and have been Googling for design information but with little success. I would...
Laurie Forbes
laforbes@...
Feb 1, 2008 1:36 pm
23023
OK well how are you going to maintain the electrical connections with the inner cable and an outer sliding nacelle? Extra cable the height of the tower?...
Thanks , Frank. There may be more -- see Alkalai silica reaction , <www.understanding-cement.com/alkali-silica.html> {we have a leaky basement submerged in...
I am new to this board so pleas excuse my ignorance if I ask some strange questions. I am working a wind turbine project to power a greenhouse; roof vents,...
Jay- Please note that the descriptor , "stainless" is a relative thing -- Most Stainless Steels , for example the (18-8) SS302,SS304 stain brown in a coastal...
Surprise! Here comes Genie! "The firm is currently developing GENIE devices of advanced design. They are expected to be capable of producing a few watts of ...
Michael: A good wind mill water heater should operate at high voltage ( peak around 400 volts): 1) For easier availability of load resistors commonly used in...
nando
nando37@...
Feb 4, 2008 2:10 pm
23029
Nickel Iron ( FerroNickel) batteries are indeed long life since they do not age like cadmium or lead types. Periodic electrolyte replacement ( with Lithium)...
nando
nando37@...
Feb 4, 2008 2:11 pm
23030
The real world is often a bit different. I am indebted to Mick Sagrillo for this interesting link with real world measurements of windshear on numerous sites...
... Yes I have put a design that I use on my web pages at http://www.scoraigwind.co.uk/circuits however this switches the 3-phase before the rectifiers. Or you...
You can save yourself a ton of money by going with the oh-so tried and true flooded lead-acid variety as produced by Surette, Hawkpower, IBE, etc. The main...
There are probably others, but Kestrel makes such a controller for their turbines - the largest of which is rated a 3 kW. Of course you can accomplish the same...
Hi there. Most folks still use lead-acid, and among L-A batteries choose commercial or industrial grade batteries. Ni-Fe batteries seem great on the surface,...
Nickle Iron batteries frequently come up. The problem is the capacity is very small per anything. They have low watt-hrs/dollar. They have low watt-hrs/...
I'd still like to see where all of that extra power cable is going to stashed...We're not talking about 22AWG that can be neatly coiled up and stored in the...
Michael, The Trimblemill, a 5kW unit [rated wind speed 10 m/sec] had such a control system. Heating was either for hot water as you want, or hot air using an...
Are these "Super Austenitics", "Super Duplex" stainless steels affordable for anything but the aerospace industry? Is plain jane SS affordable for tower bases?...
Ask Doug.. already let him know... "Well"??? Think your getting me confused with someone else. My idea is all above ground. BYW... I'm done arguing and...
NI FE cells, originally a design pursued by Thomas A Edison, are expensive. That is likely the main reason they are not real common for independent systems....
www.renewableenegyjobs.net I am pleased to announce that www.renewableenergyjobs.net as launched and will featured dailey updates jobs posting from many...
Dave, to answer your question about clocks: This might be of interest to some on the AWEA, since gearing is involved on some wind and water generators, plus...
I've recently acquired a garage forecourt type wind-driven sign and i'm keen to see if it's possible to produce electricity from it.Its a 2 blade savonius...
6 bladed 1-1.5 kW has been finished in workshop for 4 months. Not installed yet due to other priorities. Goes up for testing in open source project around May....
Hi all, I am in process of building a new home in central NH and due to the extreme length of the driveway have decided to go off-grid. I have toured several...
Reality check: Oilfield companies have untold millions to waste on items that create billions in new revenue. A tower for a small, household sized wind...
5 M/S @ 50 meters means that you will have something more in the 4.5 range. You'd probably better do your own site analysis before leaping. Matt ... [Non-text...
My skystream experiance is limited, but it appears to be quite an interesting machine (perhaps it is a little small for what you want). The sykstream can be ...
