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Author Topic: Could piezo electricity power the Earth?  (Read 2449 times)

Offline thedoc

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Could piezo electricity power the Earth?
« on: 22/04/2014 21:30:02 »
Peter Steadman asked the Naked Scientists:
   
I found out the other day that when a rock is compressed almost to breaking, it generates an electric current that seems to be constant and, unlike nuclear energy, does not deplete over time.

This being the case, could we use the planet's gravity and the mass of rocks crushing down on themselves in the earth's crust to give us a free source of electricity?

Whilst writing this I just remembered where I saw it.... It was a BBC programme about 'earth quakes', there was a scientist trying to figure out why there is sometimes glowing skies before an earthquake.

Peace Peter Steadman.
What do you think?
« Last Edit: 22/04/2014 21:30:02 by _system »


 

Offline evan_au

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Re: Could piezo electricity power the Earth?
« Reply #1 on: 23/04/2014 10:14:53 »
Most types of rock have very poor electrical conductivity, which means that you can't easily get the electricity out of the rock.
 

Offline alancalverd

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Re: Could piezo electricity power the Earth?
« Reply #2 on: 23/04/2014 14:56:19 »
Piezoelectricity can in principle be a source of useful power but a geological source would be difficult to tap, and seriously unpredictable.
 

Offline homebrewer

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Re: Could piezo electricity power the Earth?
« Reply #3 on: 23/04/2014 22:43:12 »
Hi Peter,

Thanks for your posting.

Trevor Baylis OBE filed a patent for such a piezo generator, to generate electricity for mobile devices.
 

Offline Ryan Mercer

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Re: Could piezo electricity power the Earth?
« Reply #4 on: 05/05/2014 13:52:30 »
Here is a question to go along with this question...

Assume we eventually develop a material strong enough to allow us to build a space elevator, anything from a certain point down would still be putting a large amount of weight down on the ground correct? If one could make a piezoelectric dense enough to support that weight they could make it the base of the tether and generate some of the electricity needed for the climbers. Heck, for that matter one could someday create the foundations of buildings from a manufactured piezo-electric material (skyscrapers being prime candidates) and generate some of the building's energy.

Assuming one could make the material, would this work?
 

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Re: Could piezo electricity power the Earth?
« Reply #4 on: 05/05/2014 13:52:30 »

 

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