lol.. How did I miss this thread? 
What are you planning on using as a generator? Please say Ametek tape drive motor.
What about blades? Where did you get those?
How much wind do you honestly get? You will need to put that on your roof if you expect it to generate any meaningful power... It needs to be away from things that affect wind, like fences and bushes.
The generator mount is going to pivot, right?
http://www.tlgwindpower.com/ <--- good site for parts and info.
What are you planning on using as a generator? Please say Ametek tape drive motor.
What about blades? Where did you get those?
How much wind do you honestly get? You will need to put that on your roof if you expect it to generate any meaningful power... It needs to be away from things that affect wind, like fences and bushes.
The generator mount is going to pivot, right?
http://www.tlgwindpower.com/ <--- good site for parts and info.
Originally posted by: Eli
lol.. How did I miss this thread?
What are you planning on using as a generator? Please say Ametek tape drive motor.
What about blades? Where did you get those?
How much wind do you honestly get? You will need to put that on your roof if you expect it to generate any meaningful power... It needs to be away from things that affect wind, like fences and bushes.
The generator mount is going to pivot, right?
http://www.tlgwindpower.com/ <--- good site for parts and info.
I've got all those base covered. It is going to be a 38V low RPM Ametek. The 99Volts are practically extinct now. It will be a pivot with a blade at the back to allow it to turn. Right now I just drill a hole through so I could see how it looks. It will not be like that.
For the blades, I built them myself. I just cut pvc into shape and drilled them. And I was going to use some metal conduit stuff for a much more sturdy material, but I didn't want a giant lightning rod over my house. Also, with the rope, it is VERY secure.
Oh Btw, Eli, weren't you the one helping me on the electric golf cart? You were a great resource for that. I figured out how I would build it, but I ran out of money. It will have to be an ongoing project. This wind turbine is significantly cheaper though.'
Oh, and it wont be there. It is set there to see how sturdy is was. I am also not planning on getting a significant amount of power anyways. I am young, so this is mainly an experiment to tinker around with.
You're doing a really cool project and I think it would be lots of fun.
I hate to critique, but your blades look like they are very inefficient. If you adjusted the angle of attack you could probably boost the power output by a large amount. I am not an aerospace engineer but I have untold hours of fluid dynamics an aerodynamics classes under my belt by this point, and while I realize this doesn't directly translate into practical knowledge I can tell that the blades as pictured are not giving you near the power that they could.
What you need to do is figure out the expected average wind velocity, the expected rotational velocity of the turbine. This will give you the free stream flow conditions for a point over the wing, and you can then fairly easily adjust the angle of attack to maximize the lift (for most wing sections, the coefficient of lift is a linear function of angle of attack until stall conditions are reached).
For the real wind turbines you see in West Texas, of course the angle of attack is adjustable and the speed and everything is computer regulated, but even with fixed pitch blades you could see some pretty large improvements. PM me if you're curious.
I hate to critique, but your blades look like they are very inefficient. If you adjusted the angle of attack you could probably boost the power output by a large amount. I am not an aerospace engineer but I have untold hours of fluid dynamics an aerodynamics classes under my belt by this point, and while I realize this doesn't directly translate into practical knowledge I can tell that the blades as pictured are not giving you near the power that they could.
What you need to do is figure out the expected average wind velocity, the expected rotational velocity of the turbine. This will give you the free stream flow conditions for a point over the wing, and you can then fairly easily adjust the angle of attack to maximize the lift (for most wing sections, the coefficient of lift is a linear function of angle of attack until stall conditions are reached).
For the real wind turbines you see in West Texas, of course the angle of attack is adjustable and the speed and everything is computer regulated, but even with fixed pitch blades you could see some pretty large improvements. PM me if you're curious.
meltdown75
Lifer
- Nov 17, 2004
- 37,548
- 7
- 81
Super cool. I don't know if you will find this interesting but I work in property assessment and recently had to look up some info on these. This is the company that one person used - if you click on "Products" they have some informative .pdf files about the various turbines. The one I was looking at was the Trillium 3.5kW. Anyway great thread, good luck to you!
edit: oops forgot the link
http://www.renewableenergysolutions.ca/index.html#
edit: oops forgot the link
http://www.renewableenergysolutions.ca/index.html#
Aren't the 38V Ametek's aweful for generating power?
I'm so out of the loop, I don't have links handy.. but there is lots of info out there. The best Ametek motors for this type of application are the 40 or 50V ones, IIRC... The 99V Ametek is the ultimate, but it takes a bigger overall setup to get it turning.
I've got one of the 30V ones, which are fairly decent.. I think 0.225V/RPM?
When it comes to wind generators, the blades are everything. They're what really determine how much power you're going to be able to get. Some of the micro blades on TLG are fairly inexpensive, you might want to look into them.
Its been my plan for quite a while to build a portable wind generator for use at the beach. It will run the solar/wind powered cooler I built a while back.
I'm so out of the loop, I don't have links handy.. but there is lots of info out there. The best Ametek motors for this type of application are the 40 or 50V ones, IIRC... The 99V Ametek is the ultimate, but it takes a bigger overall setup to get it turning.
I've got one of the 30V ones, which are fairly decent.. I think 0.225V/RPM?
When it comes to wind generators, the blades are everything. They're what really determine how much power you're going to be able to get. Some of the micro blades on TLG are fairly inexpensive, you might want to look into them.
Its been my plan for quite a while to build a portable wind generator for use at the beach. It will run the solar/wind powered cooler I built a while back.
Yes, the 38V are not nearly as good as the 99 volts. It's just that they are the cheapest, and the only ones that I can really find. This doesn't need to crank out much, in fact, it is mainly just for tinkering around with. They aren't horrible though. With a turbine you want high volts for low RPMs, this is why I cannot use something like a car alternator. The Ametek motors have these low RPMs, so I have to go with them. You are right though, they blades are important. Once I get my motor, I might carve out some new blades with more of an angle on them.
That's generally the idea, yeah.
The generator charges batteries, and you have an inverter to run 120V appliances.
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