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4hv.org :: Forums :: General Science and Electronics
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Sky voltage

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Zamboni
Sat Apr 02 2011, 03:55PM Print
Zamboni Registered Member #2836 Joined: Fri Apr 30 2010, 01:24PM
Location:
Posts: 41
I was researching the corona motor. The motors are powered by very high voltages (over 10K). I noticed that some people were powering them by using "sky voltage". Here is a link to the concept. Link2

I tried to do the same kind of thing. I I took a 3X3 inch piece of wire screening, put a smoke detector americium source on top of it. I then ran it up 10 feet off the ground on an insulated pole (fiberglass). I was able to get 280 volts at 3 nanoamps.

I realize that the voltage is very small 10 feet off the ground, but since it grows by about 100 volts per meter, it would be quite large and, I would think, commercially viable. I understand that lightning would be quite a problem, but it seems to me that very smart people could come up with a way to deal with that. The energy would be clean, free and available anywhere.

Since it is so easy to do, there must be a good reason why this has not been exploited on a commercial basis. I was hoping hat someone might be able to help me understand why this has not been made into a simple "clean" energy source.


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Steve Conner
Sat Apr 02 2011, 04:13PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I think it's probably because the amount of power generated is so small, it's not worth the bother.

Example: Let's say a 10 foot fiberglass pole costs $5, and a piece of wire screen and a radioactive source another $5. Total $10.

Now, it generates 840 nanowatts, let's say 1 microwatt to be kind. How long will the device take to pay for itself at an electricity price of 10 cents per kilowatt hour?

Answer: To pay for itself it must generate $10 worth of electricity, which is 100kWh, or 10^5 watt-hours. Since it generates 10^-6 watts this will take 10^11 hours, which is 11.4 million years.

Put another way: If the device lasts 100 years before falling apart, the cost of the energy from it is $11400 per kilowatt hour.

I imagine using a longer pole won't affect the above conclusions significantly.
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Conundrum
Sun Apr 03 2011, 06:46AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Putting a small wind turbine on top of the pole or just a column of used case fans with the coils wired through Schottky rectifiers salvaged from PSUs might be more useful methinks.

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Proud Mary
Sun Apr 03 2011, 05:18PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Studying the atmospheric potential gradient using field mills throws light on our understanding of geomagnetic disturbances, Sudden Ionospheric Disturbances, terrestrial and space weather, and no doubt much else besides.
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Patrick
Mon Apr 04 2011, 06:10AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Zamboni wrote ...

Since it is so easy to do, there must be a good reason why this has not been exploited on a commercial basis. I was hoping hat someone might be able to help me understand why this has not been made into a simple "clean" energy source.
Well in the link you cite :

Science and Invention, Vol. IX (106) #10 (February 1922)
Power from the Air (I)

by

Hugo Gernsback


During the war there was developed in Germany a new art --- or science --- that bids fair to revolutionize our present means of obtaining power.

This art, which is as new now as wireless was 25 years ago, will attain proportions during the next 25 years that may appear fantastic today. The inventor of the new science, an engineer of note, Herr Hermann Plauson, has devoted years of labor to his researches and he has now actually in use small power plants, that generate electricity direct from the air, day and night, without interruption at practically no cost, once the plant is constructed.
We had occasion, in one of our former issues, to describe the system, roughly, from cabled dispatches, but complete information is available now. The amount of electrical power that resides in our atmosphere is astounding. Herr Plauson found in his experiments that a single balloon sent aloft to a height of 300 yards gave a constant current at 400 volts of 1.8 amperes, or in 24 hours over 17-1/4 kilowatts! By using two balloons in connection with a special condenser battery, the power obtained was 81-1/2 kilowatts in 24 hours. The actual current delivered was 6.8 amperes at 500 volts.

The best balloons used by the inventor are made of thin aluminum leaf. No fabric was used. A simple internal system of ribs, stays and wires, gives the balloon rigidity as well as a certain amount of elasticity. The balloon, when made airtight, is filled with hydrogen or better, with helium. It will then stay aloft for weeks at a time. The outer surface is dotted with extremely sharp pins, made sharp electrolytically. Ordinary pins did not prove good current collectors, as they lacked extreme sharpness. The pins themselves were made from amalgamated zinc, containing a radium preparation, in order to ionize the air. It was also found that by dotting the outer surface of the balloon with zinc-amalgam more current could be collected. Even better results were obtained with polonium amalgam. Plauson states that the function of these amalgams is purely photoelectric.

One hundred of such captive balloons, separated one hundred yards from each other, will give a steady yield of 200 horsepower. This is the minimum, because in the winter this figure increases up to 400 horsepower, due to the higher electrification of the atmosphere.

We need not go into the technic of how the current is finally made useable for industrial purposes, suffice it to say that the problem has been entirely solved by Herr Plauson.
By using batteries of condensers, high tension transformers, etc., the current can be transformed to any form desires. Such as for lighting lamps, running motors, charging storage batteries, etc.

Plauson also invented a sort of electrostatic rotary transformer which gives alternating current without the use of condensers and transformers. Indeed, its output is very great, as it actually ‘sucks’ the current down rapidly from the collector balloons. There is no doubt that this invention will soon come into universal use all over the world. We will see the land dotted with captive balloons, particularly in the country and wherever water power does not abound. Indeed, the time is not distant when nearly all of our power will be derived from the atmosphere. So far it seems to be the cheapest form of power known, it being much cheaper even than water power --- the cheapest form of power known today. Not only that, but as the inventor points out, no devastating thunder storms occur near such aerial power plants, because the balloons act not only as lightning arresters, but they quickly discharge the biggest thunder cloud, safely and noiselessly through their grounded spark gaps.


I would have to say I think these claims were totally bogus. I have done some similar work (long kite string antennas with diodes), but no where near 400 Hp, only MicroWatts and NanoWatts. Mostly from radio waves and from radio stations. Any Geo-electric fields I may have encountered would be very weak, just insignificant really.
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radiotech
Mon Apr 04 2011, 06:41AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
If you turn the problem inside out and consider empty space
incapable of having any electric field whatsoever, then the earths
electric field is just a way of filling all space with just enough crap to
yield a time-averaged energy product because of free floating
ions.

And of course, just looking at the electric field is perhaps short
sighted. Do pions make any noise?

Would a braodband noise detector would produce more power
than a nanoamp capacitor plate collector.

Hugo Gernsback was a futurist who published a little booklet
called The Forecast.
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Patrick
Mon Apr 04 2011, 05:44PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
radiotech wrote ...

If you turn the problem inside out and consider empty space
incapable of having any electric field whatsoever, then the earths
electric field is just a way of filling all space with just enough crap to
yield a time-averaged energy product because of free floating
ions.

And of course, just looking at the electric field is perhaps short
sighted. Do pions make any noise?

Would a braodband noise detector would produce more power
than a nanoamp capacitor plate collector.

Hugo Gernsback was a futurist who published a little booklet
called The Forecast.
I cant tell, are you agreeing with me Radiotech?

I dont know if Hugo bothered to verify these claims by others or simply published these fantastical numbers.

I do agree that there is the ability to gain some ultra low power from all kinds of special contraptions, but its all very small. Then scam artists hype it up, promise mega power. I think this is the best explanation I can give Zamboni. I would also support Steve McConnor's approximations and conclusions.
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radiotech
Mon Apr 04 2011, 07:48PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
I dont know if Hugo bothered to verify these claims by others or simply published these fantastical numbers.

Gernsback had knowledge about the practical issues of electricity:
the family had been manufacturing and marketing radio and science
materials for years. He did hold patents in the field.

The number under question is the 6.8 Amps at 400 volts.
What is not known is the size of the balloon. Was it the
size of a blimp? The 400 volt number would represent 59 ohms as load resistance for maximum transfer.

What would be the metalic skin area of the Hindenberg, which
had a net lift of about 125 tonnes.?

Perhaps a good exercise would to take the expected "brush
discharge" "St Elmos Fire" or what ever , current over a metal
skin covering 7 million cubic feet in the shape ratio of 6:1
augmented by millions of tiny points and add in the ion loss
of the radium mix in the coating, and see what pops out. Shoiuld
be a cinch for a computer to model.

The circuit formed by the teathered test craft (failed) mission
NASA tried was fed by a little ion generator on the outside of the
shuttle. What was the current in the teather when it parted ? I think
the disturbance toasted a slew of instrumentation when that happened. Although the energy there was more the teather conductor passing through a magnetic field, it was still an 'rarefied' air terminal.

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Zamboni
Mon Apr 04 2011, 11:33PM
Zamboni Registered Member #2836 Joined: Fri Apr 30 2010, 01:24PM
Location:
Posts: 41
Thank you all for your replies. You have helped me understand why it is impractical.
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magnet18
Sat Apr 09 2011, 04:25PM
magnet18 Registered Member #3766 Joined: Sun Mar 20 2011, 05:39AM
Location: 1307912312 3766 FT117575 Indiana State
Posts: 624
You might be able to power something like this if you really, REALLY wanted to...
for some reason...
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