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Author Topic: how to take power out of bouncing balls?  (Read 8071 times)

Offline buzneg

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how to take power out of bouncing balls?
« on: July 02, 2007, 01:21:29 AM »
Heat is the vibration of atoms, so I think it's safe to say that if one could take energy out of a room of randomly bouncing balls one could take energy from heat.

Here's a scenario I've been pondering. Take two bouncing balls, one going up as one goes down, to account for the randomness. Now if you move a platform/piston down on them at the speed of the bounce, and you move it in only half way (half the distance of the bounce) moving in as the top ball just starts to go back down and the bottom one just starts to go back up, you would have gotten in to half of both the bouncing balls bounce area, with putting no energy into the balls, because you didn't contact them yet. So then when you move outwards you can take the energy out of the moving balls by moving slowly, absorbing the hits.

Can this not work with heat? compress air quickly, and then let it decompress slowly?

using an insulator for the piston, and walls would be good to stop the momentum (heat energy) from escaping out the sides.

-energy is a measure of momentum through a point, so momentum is the essance of energy.

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Offline sm0ky2

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Re: how to take power out of bouncing balls?
« Reply #1 on: September 19, 2007, 05:25:36 AM »
trying to conceptualize this here,. so the piston moves down (from some external source of power?)
then the balls push "up" on the piston when they hit it (thus extracting energy out of the bounce)
creating vacuum and cooling off the air heated by the compresion-heat exchange when the balls bounced?

provided you can keep the balls bouncing somewhat vertically, and not off to the side....
you coud extract the power of the bouncing ball, on the opposite end of the piston.
minus the heat loss...

however lets examine this ball. as it bounces

Ball at rest has 0 energy.  You raise the mass of the ball which requires energy input.
when the ball falls some of that energy is absorbed by the rubber in the form of compression (like a spring, trampoline,little thingies that go "thwonggggg" behind you doors,ect.)

some of the energy is converted to heat, and heats up the rubber of the ball. this would heat up the air inside the "chamber". When you lower the piston you compress the air which takes some of the energy input to move the piston into heat inside the chamber. this increases the pressure in the box which helps move the piston outwards with each "hit" of the ball.

The logistics of building such a system would be rediculous, but its possible to create this. but  such a system seems to be rather inneficient

anyone have thoughts on this?

Offline buzneg

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Re: how to take power out of bouncing balls?
« Reply #2 on: September 28, 2007, 09:38:44 PM »
I used the balls just to represent the vibrations of the atoms, which is heat. I figure if it can be done with two balls, just taking the energy from the balls without extending the piston back father then where it started, it can be done with atomic vibration, different gear ratio's would have to be used, it would be very complexe. A very good insultator for the chamber walls would be best. It should be possible to model, and see it this will work mathematically. And a fundemental part would be a lag time in the pressure pushing the piston back, as the vibrationing atoms take time to adjust or effect the closing piston. Using two different sized pistons might account for the gearing problem. It would be a quick compress, slow decompress, and not a full decompress, as the air would have to be cooler for it to work.

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Re: how to take power out of bouncing balls?
« Reply #2 on: September 28, 2007, 09:38:44 PM »
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