Power from gravity
Posted 28 September 2005 - 09:39 AM
Say this is like a poll.
Has anybody seen a system that generates
electric power exploiting the gravity force?
Forget about hydro-power. I mean a different system.
Posted 28 September 2005 - 05:45 PM
Any other method of trying to use gravity has one very big looming problem with it. You must overcome the effects of local gravity in the first place in order to take advantage of it later. No way around that. So when you add in losses from friction, windage, heat etc., it will always take more energy to lift an object that you can recover from generation as it falls.
The same is true for hydro power by the way. It's just that the solar energy involved in "lifting" the water in the first place is essentially free and will happen anyway, so the relative inefficiency is meaningless.
Sorry, forgot about your poll. Obviously my answer is "No".
There have been many many machines designed over the years that have supposedly been "gravity generators" and their close cousins, "perpetual motion machines", but every one of them has been found to have some sort of external energy input, some being obvious oversights, others being deliberate fraud attempts (i.e. hidden electromagnets and batteries).
Posted 28 September 2005 - 07:19 PM
NO, I can not think of an example other than hydro that uses gravity to generate electricity.
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Posted 29 September 2005 - 12:06 PM
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