Buoyancy-Based Power Generation - Full Disclosure

[Barab]

From looking at your drawings, it looks to me as this has already been built.  Here is the video I am referring to:
http://youtu.be/UGPEOlQ2_uA

will try to embed...

<iframe width="425" height="349" src="http://www.youtube.com/embed/UGPEOlQ2_uA" frameborder="0" allowfullscreen></iframe>

[The Eskimo Quinn]

hey smoke, thought this may be of interest, was watching myth busters and saw and interesting fact that actually changes the perception of many vintage bouancy machines, you know the one where hollow balls are fed into the bottom of a tank, weel they were all debunked because it was said you could not get the balls into the bottom of the tank for the same reason they float up in the tank, mythbusters proved this false, not intentionally regarding the machines, but the pumped ping pong balls down through the water into a sunken boat to see if it would float like the 70 year old donald duck cartoon and it worked refloating the boat, but they pumped the balls down with water and used the viscosity and cohesion of the water holding onto the balls, you see because they were in a tube they were only subject to the pressure within the tube not the whole ocean, and as it was mosttly filled with air (the balls) the pump was quite small and managed easilly. interesting side information from their film that may be of some use in designing such machines, hope you can use it

Archer

ps the viscosity,cohesion and pressue variance regarding the tube is just my analisys of what was happening it iis not in the film, so it may not be exactly the reason, but my physics and logic says that appears most likely why it works

[kolbacict]

There are so-called magnetic fluids. This is used in separators of non-magnetic materials.when a magnetic field is applied to a magnetic fluid, its density increases.the body at the bottom floats up.
R. Rozencveig speaks about it
How much energy needs to be spent to create a field and how much will we get from increasing the potential energy of the body?