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Author Topic: Free Energy from Wind  (Read 3527 times)

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Posts: 3866

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Has anyone every wondered if a new type of wind turbine could be made.

In the UK there's a very old technology for drying hops to make beer, a building is constructed with wooden rafters criss crossed at different levels, hops are layed across the rafters and a funnel and rotatry air cap is placed on top of the building, a vane rotates to point an opening on the opposite side to the direction of wind, as the wind blows air is sucked through the whole building from ground up to the rotating vent, this air that is drawn through the hops then dries them by air movement, a small fire can also be placed underneath in wet and cold weather to speed the drying process.

Now the biggest problem with the average household in the UK is that most don't have big gardens, and the attempt to place a wind turbine will not be allowed, one because they are not currently accepted for their looks but also because of the noise of the rotating blades and bearings etc.

What if a long tube was erected, most houses already have 1 of these up to the top of the house for sewage ventilation and to carry any smells away, so the tube has a rotating vent on top to draw air up through the tube with the bottom of the pipe connected to a Tesla turbine and generator.

To make it more efficient we could use 2 tubes, each having an opening on each side of the rotating vent on the top of the tube, one tube would get suction and the other facing into the wind would get air pressure.

It would be quiet easy to get away with erecting large tubes than anything else  :) the question is how much energy can be generated from a given wind speed.

I will need to get my head around the maths but it shouldn't be that hard to work out.

Group: Tinkerer
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Interesting idea, but it's much easier to wrap your bifilar wires around a magnet and get to the heart of the matter.

Others have attempted to use the swaying of trees, or the drifting of ions in the wind as well.

A simple orgone accumulator, has the potential for electrical generation if connected to a load and sink.

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So first step to work out the mass of air moving at different speeds

Using a 20cm diameter tube

Air has a known density (around 1.23 kg/m3 at sea level)
Power = 0.5 x Area x Air Density x Velocity3

Area = 0.125664 m2

1m/s = 0.5 x 0.125664 x 1.23 x 1^3 =0.07728 Watts
5m/s = 0.5 x 0.125664 x 1.23 x 5^3 = 9.66042 Watts
10m/s = 0.5 x 0.125664 x 1.23 x 10^3 = 77.28336 Watts
15m/s = 0.5 x 0.125664 x 1.23 x 15^3 = 260.83134 Watts
20m/s = 0.5 x 0.125664 x 1.23 x 20^3 = 618.266 Watts
25m/s = 0.5 x 0.125664 x 1.23 x 25^3 = 1207.5525 Watts
30m/s = 0.5 x 0.125664 x 1.23 x 30^3 = 2086.65 Watts

Wow unless i have made a mistake with the maths this looks too good to be true.
OK i need to look at efficiencies of the generator/ turbine and tube flow but even is i get 25% efficiency this will work.

Advantages so far
Tesla turbine very efficient, runs at very high RPM making the generator much more efficient.
Only tubes can be seen
There's nothing stopping multiple tubes being added to increase air flow for instance 5 inlet tube and 5 outlet tubes would yield as follows

Area = 0.62832 m2

1m/s = 0.5 x 0.62832 x 1.23 x 1^3 =0.3864168 Watts
5m/s = 0.5 x 0.62832 x 1.23 x 5^3 = 48.3021 Watts
10m/s = 0.5 x 0.62832 x 1.23 x 10^3 = 386.4168 Watts
15m/s = 0.5 x 0.62832 x 1.23 x 15^3 = 1304.1567 Watts
20m/s = 0.5 x 0.62832 x 1.23 x 20^3 = 3091.3344 Watts
25m/s = 0.5 x 0.62832 x 1.23 x 25^3 = 6037.7625 Watts
30m/s = 0.5 x 0.62832 x 1.23 x 30^3 = 10433.2536 Watts

1m/s = 2.2369 MPH
5m/s = 11.18468 MPH
10m/s = 22.3693 MPH
15m/s = 33.5540 MPH
20m/s = 44.7387 MPH
25m/s = 55.9234 MPH
30m/s = 67.1080 MPH

Regarding the tesla turbine
"With proper use of the analytical results, the rotor efficiency using laminar flow can be very high, even above 95%. However, in order to attain high rotor efficiency, the flowrate number must be made small which means high rotor efficiency is achieved at the expense of using a large number of disks and hence a physically larger rotor."
« Last Edit: 2011-11-30, 21:00:11 by Peterae »

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Tesla Turbine generator
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