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Forum Index : Windmills : vertical windmills
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readyakira Senior Member  Joined: 17/07/2008 Location: United StatesPosts: 114 |
So I was watching the green channel and came across a windmill that used a blade array that spun on a vertical shaft as opposed to the standard horizontal ones. Anyone have any links to some info on how to build? it looked like it was pvc pipes cut say in quarters, and about 8 of them placed vertical with a disc at the top and one at the bottom. This looks like a bit more pratcial design considering the close proximity to neighbors we have here. got a hold of two of the 14/42 F&P motors that I intend to use in this project, but need to figure out the blade design first so I know how I will go about mounting the motors together. Been looking and since these types seem to be low rpm, would it be better to leave the F&P closer to stock and be able to produce a higher voltage and use some sort of circuitry to bring the voltage down to a better charging V? Woulnd't that also bring the current up, keeping the current draw from the F&P down therefore allowing it to be capable of producing more power with less heat? Don't you think Free/Renewable energy should be mandatory in new buildings? |
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| quahogwi Newbie  Joined: 07/11/2008 Location: United StatesPosts: 7 |
What you want to do a search on is VAWT or Savonious Wind Turbines. You can also search for PVC wind turbine blades. Or you can start with these: http://technorati.com/videos/youtube.com%2Fwatch%3Fv%3D24LSn ATIZhw or: http://2good2lose.com/windturbine.shtml or for PVC blades for a HAWT try: http://www.greenterrafirma.com/making-pvc-wind-turbine-blade s.html Dave Dave Brown Green Bay, WI |
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| readyakira Senior Member Joined: 17/07/2008 Location: United StatesPosts: 114 |
the first link seemed to be broken... :( Don't you think Free/Renewable energy should be mandatory in new buildings? |
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| quahogwi Newbie Joined: 07/11/2008 Location: United StatesPosts: 7 |
Remove the space near the end. Dave Brown Green Bay, WI |
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| readyakira Senior Member Joined: 17/07/2008 Location: United StatesPosts: 114 |
second link was kind of interesting. I am looking into the Savonious Wind Turbines designs. I was trying to find some info on spacings. I have a bit of 6" PVC I have cut in half. I was trying to figure out more info on what makes them more efficient my plan allows for either space at the center or linked in the center. I am leaning towards running a pipe up thru the middle for stability and strength, but am still trying to find something that gives more info on the aero dynamics part of the design. Don't you think Free/Renewable energy should be mandatory in new buildings? |
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| quahogwi Newbie Joined: 07/11/2008 Location: United StatesPosts: 7 |
It seems that because I've updated to Flash 10 that TinyURL won't copy anything into my clipboard anymore. Maybe this is right this time. Otherwise look for an out of place space or something. http://technorati.com/videos/youtube.com%2Fwatch%3Fv%3D24LSn ATIZhw Dave Brown Green Bay, WI |
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| Jon Bennett Newbie Joined: 01/11/2007 Location: AustraliaPosts: 27 |
For a pretty efficient VAWT look at Ed Lenz's design. He has info on building his turbine at thhis linkLenz2 regards jon |
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| readyakira Senior Member Joined: 17/07/2008 Location: United StatesPosts: 114 |
So I started to make a prototype of the split pvc type VAWT. the more I progress the more I think this powerplant will need to be rather large. I was hoping to drive 2 F&P motors with it, but am starting to think the power required to turn them under load may be more then I have room to accomodate. I am on a rather small piece of land, one of the reasons I want to go with a VAWT. Has anyone made this split PVC style one? I am trying to get an idea on how big a pc of pvc I should use. 10"? I think I can even get some that is about 16" relatively cheap if need be. BTW I like that link you posted but I think for now that is abit above what I am trying to accomplish for my first sucessfull mill. Don't you think Free/Renewable energy should be mandatory in new buildings? |
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| faroun Regular Member  Joined: 18/09/2008 Location: Posts: 62 |
JUST Type vawt.tk in your browser http:://vawt.tk i have built 10 of them the best one is v8-4" tell me what you think. regards Many Ideas One Brain. http://www.wrapwind.com |
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| dwyer Guru  Joined: 19/09/2005 Location: AustraliaPosts: 574 |
Hi Faroun Welcome to Homegrown Power Wow l do like your web set up and what country you are you from ? lucky that you have sold 10 wind power  so it must really good Well done mate  oh forgot to ask also what amp output and the voltage??
Dwyer the bushman |
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GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
Hi dwyer, from Farouns description, he is trying to make more than 100W from 35kph wind. I do not think he has achieved this yet. Gordon. become more energy aware |
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| faroun Regular Member Joined: 18/09/2008 Location: Posts: 62 |
dwyer, it is true, these turbines are in the testing mode. they are not for sale yet untill testing is done. you are welcome to biuld and use the design for your self but not commercially. have fun. Many Ideas One Brain. http://www.wrapwind.com |
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vawtman Senior Member Joined: 14/09/2006 Location: United StatesPosts: 146 |
Hey Quahog I'm in New London, Wi. and working on 8ft Giromill.Small world isn't it. |
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| quahogwi Newbie Joined: 07/11/2008 Location: United StatesPosts: 7 |
Nice to meet you. The world is even smaller than you thought, I'm in Green Bay. At this time I've only been toying with VAWT's of the Savonius type. I've made a couple of the split barrel/bucket type to get a feel for how things work. My latest venture is a 3-blade design. The blades are shaped like a sailboat's main triangular sail. It works better than the typical split bucket Savonius, or at least it seems so to me. I'll get a jpg picture of it and upload it. I'll also try to give a reasonable description of it's construction. My next test project is to either tie in a small PM motor and some LED's or to try another sail design of either a volute or involute shape. Dave Brown Green Bay, WI |
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| quahogwi Newbie Joined: 07/11/2008 Location: United StatesPosts: 7 |
This is the sail shaped Savonius type VAWT that I made as a trial. It works very good. No special shaping of the 'sails', they are simply cut direct from a 55gal white plastic drum. There are lots of mistakes in it, but surprisingly it is a very forgiving design and works well. Next is to connect a small PMM to it and make some electricity. Dave Brown Green Bay, WI |
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robbo Regular Member Joined: 25/03/2007 Location: AustraliaPosts: 71 |
Hey there Dave, I like the "sail" look. I think that its always important to make these things look attractive, as they will stimulate a lot of conversation, especially in the suburbs. I always enjoy it more, when the design looks nice. This design would be easier to have balanced from the bottom only as well. Reducing the need for the ugly "top" part of some frame. By the way, how much torque is in there. Put a Pmm motor on the outside of the wheel for gearing effect. Could easily power some garden lights ! "the Earth was not given to us, by our fathers, rather, it is lent to us by our children". |
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| faroun Regular Member Joined: 18/09/2008 Location: Posts: 62 |
nice work quahogwi,it looks simple to build. i just recived my rpm and wind guage and i am going to test my output on mine. you have a good start with your unique design, just dont stop and i am sure you will find a way to improove it. best regads Vawt.tk Many Ideas One Brain. http://www.wrapwind.com |
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| quahogwi Newbie Joined: 07/11/2008 Location: United StatesPosts: 7 |
Faroun, Thanks for the compliment. I've got to admit, though, that I started off trying a different design. What I was attempting at first was to make a crude double helix type design. I first marked off the the halves of a plastic barrel at top and bottom. I numbered them 1 & 2 respectively at both ends of the barrel. Using a piece of twine I connected T(op)1 to B(ottom)2, then T2 to B1, traced a line and cut. The result, I had imagined, would have been two helical pieces which I could slide apart as the two halves of a Savonius turbine. I learned the hard way that this isn't the way to make a pair of matching helical buckets. Didn't work. Either that or my AADD took over and kept me from aligning them properly. I remembered seeing a cloth rotor of a near conical shape. That gave me the idea to make a couple more cuts resulting in a number of triangular pieces, curved to make a belly in the "sail". A few PVC parts and a 1/2" steel tube for the axle and a plywood disk. I used ball bearings with some light oil. The result is what you see in the picture above. I haven't done any testing, but it starts is pretty low breezes. I made one earlier simply cutting a 5 gal pail in two and sliding them apart to form the typical Savonius "S", only slightly overlapped (about 10% or so). This I mounted in a simple box frame. It starts turning in much less wind than does the tri-sail one. But both do start turning in very light breezes. I haven't done any testing but I have picked up an inexpensive bicycle speedometer/computer. With the magnet attached to the bottom of the disk and the induction coil firmly attached to the stand, and it will make a reasonable RPM gauge. As I understand it, you set the "wheel circumference" to a fictitious number of 16.66 or 166.7 or something along that order. The result is the computer calculates what it thinks is km/h, but in fact is displaying true RPM at that particular moment. I've tried it, and it works quite well. I just haven't recorded any information as yet. I've been suffering from analysis paralysis and have to break out of that rut. I just have a couple of questions to get answered. I'll put them up seperate from this reply. Anyway, thanks for the compliments on the configuration that I ended up with. Add some LED's, a little electrical power, and maybe some paint and I'll have s spinning Christmas Tree. Dave Brown Green Bay, WI |
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| quahogwi Newbie Joined: 07/11/2008 Location: United StatesPosts: 7 |
First question is whether or not there has ever been a concensus as to which variation of the Savonius "S" appears to be best suited to electrical generation? There's the pure Savonius "S" where the center is closed. Then the Sandia style "S" where the center has the halves overlapped by a ratio or percent of about 0.1 to 0.15. There's the Benesh variant and others. But trying to decipher the math and terminology is baffeling me. Any help out there? I'm thinking that the Sandia overlapping "S" configuration is the way to go with the Savonius approach. All in all, I don't want to revent the wheel here, I just want a better wheel to use. Dave Brown Green Bay, WI |
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| readyakira Senior Member Joined: 17/07/2008 Location: United StatesPosts: 114 |
That's where I was going with the post. I am looking to get a feel for which one has the most low speed power, with low startup. I am afraid where I will be forced to locate the mill will have the possibility of causing some commotion between the neighbors and myself if this turbine spins at a thousand RPM's and makes a ton of noise. I am also trying (hoping to limit width to about 3ft and height is debatable. Don't you think Free/Renewable energy should be mandatory in new buildings? |
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