blustery wind here

m6yru

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wellllll.... i was looking into wind generator... most i have seen start at 2ms... well where i live i have high gusts and blustery wind tonight but the anemometer i bought was usefull, with high wind i get almost 2ms, with gusts of 3.5ms

here is a quick video

sigh no wind power
 

Abarth595

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I've seen your clip and I suppose that you are standing on the ground with the meter in your hand, not even over your head.
The wind on the high turbine will catch more and cleaner wind if there are not too many obstructions in your area.( buildings, trees, ...)

So I think your values are not representable for your reality.
However, it is very hard to have good wind in populated areas.
 

Korishan

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I'm assuming "2ms" = 2 meters per second and not milliseconds :p

I agree with Abarth595. You're at ground level taking those measurements. Even going 10 feet (3 meters) higher, you'll get more consistent results. If you live near trees and/or buildings, I would recommend a VAWT (Vertical Axis Wind Turbine) instead of HAWT (Horizontal Axis Wind Turbine). This type of turbine is more suited for variable and flaky wind conditions, as well as low speed. It's designed to turn slowly (about 10m/s or so) but if designed properly, could achieve 30m/s. But, you probably don't want it spinning that fast. It is designed to make torque, not rpms. Just use a pulley system to convert to speed.
 

Abarth595

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Korishan said:
I'm assuming "2ms" = 2 meters per second and not milliseconds :p

I agree with Abarth595. You're at ground level taking those measurements. Even going 10 feet (3 meters) higher, you'll get more consistent results. If you live near trees and/or buildings, I would recommend a VAWT (Vertical Axis Wind Turbine) instead of HAWT (Horizontal Axis Wind Turbine). This type of turbine is more suited for variable and flaky wind conditions, as well as low speed. It's designed to turn slowly (about 10m/s or so) but if designed properly, could achieve 30m/s. But, you probably don't want it spinning that fast. It is designed to make torque, not rpms. Just use a pulley system to convert to speed.

You know of any VAWT which are giving good output for the money?
Most of them are very low wattage, others are very expensive...
And if possible 48V output...
 

m6yru

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Abarth595 said:
I've seen your clip and I suppose that you are standing on the ground with the meter in your hand, not even over your head.
The wind on the high turbine will catch more and cleaner wind if there are not too many obstructions in your area.( buildings, trees, ...)

So I think your values are not representable for your reality.
However, it is very hard to have good wind in populated areas.

Thank you so much for your time and input :)
this was head hight as you know it is not ideal at that height...

i was looking into a VAWT but the best i could find actually started to produce minimal power at 2m/s wind speed, i even contemplated making my own due to the ones on the market are too low wattage or overly expencive....

in reality my biggest issue is location, im unsure if you seen one of my other posts of where i live because i got from northeast to west a woodland with trees at 30-40ft high and west to north east a huge hill thats about 12 meters higher than my place
 

Korishan

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Just make your own. They are very easy to make. You can go as cheap as using large bicycle rims and adding some pvc thinwall pipe to it (or some other light weight curved conduit) or you can go the extra mile and use some tapered bearings and build a solid unit that can really withstand some wind forces.
I'm going to make a metal frame and use the tapered bearing method when I build mine. It'll be about 10' (3.5m) in diameter and about 10' tall, and have boxed inlets to direct the wind into chambers. this method actually multiplies the power it generates as it collects 100 sq foot (10x10) of area and compresses it down to a 2' x 10' opening. 100/20 = ~5x increase in wind power (possibly more as compressed air moves faster as it's compressed).

Some examples of home made ones:
https://artojh.files.wordpress.com/2011/01/img_2283.jpg
http://2.bp.blogspot.com/_RxOGghiKGpk/TLhMBfAwflI/AAAAAAAAAAU/mOamRSQneZY/s1600/Savonius.jpg
http://greenterrafirma.com/images/vawt/bottom-rim-large.jpg
http://greenterrafirma.com/images/vawt/VAWT2.jpg

I was trying to find a picture to show the box design, and darned if I can't find one now :p But there are a lot of variations on the build designs.


m6yru said:
i was looking into a VAWT but the best i could find actually started to produce minimal power at 2m/s wind speed, i even contemplated making my own due to the ones on the market are too low wattage or overly expencive....

in reality my biggest issue is location, im unsure if you seen one of my other posts of where i live because i got from northeast to west a woodland with trees at 30-40ft high and west to north east a huge hill thats about 12 meters higher than my place


2 m/s is if you at one ground level. You gotta remember the VAWT is vertical, not horizontal. So you can make it taller if you want. To achieve 2 m/s isn't really that hard to do. VAWT also like the turbulent air flow coming off of buildings and tree lines. It helps them get a boost in turning. And due to their design, the fluctuations won't actually slow the turbine down, like they do in a HAWT design.

Wind will flow according to the terrain. Just like water will flow over the terrain. So when it comes over the tree line, it will drop down and actually speed up a little. Same thing coming over the hill. Wind being pushed up the hill or over the tree lines are compressed as they travel over it. Once they get to a clearing where the space expands, the air will rush to fill in the area. This is partially where the turbulence comes from.


Here's a video of the design I was thinking of:
 

m6yru

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after someone looking at where i live, their first words was you got two options, not to bother or a 50ft mast to put a turbine on, he said what i got is a lot of "dirty" unusable wind due to the trees and location of the buildings.
on the one side i asked about the VAWT and he said it wont spin fast enough to produce anything meaningful for the cost...
he had an anemometer on a tall telescopic pole, it read max 3.4MPH....

so unless i get a turbine over the top of the trees i got no chance.... however id love a 50ft mast for my radio comms ;) but damn that tall, so very tall!

sigh
 

Korishan

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If you could get an anemometer on a pole and leave it up there for 48hrs, you'd get a better reading. You could find out that you get great winds at certain times of the day. Just a thought.

Plus, you could always just build a cheap mock up version with no electronics, just the carrassel, and see how fast it turns.
 
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