Here's a link to how a current membrane might be reconfigured. The vacuum (29 hg's ?) could be generated and maintained by pumping (drawn, possi...

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Here's a link to how a current membrane might be reconfigured. The vacuum (29 hg's ?) could be generated and maintained by pumping (drawn, possibly using a mechanical piston type pump, like one used for wells) water out of the top leaving very little air in it. Discharge pumps (both brine and desalinated) would draw sea water into membrane. Since membranes pores are so small, the vacuum above the water may separate the water so that individual molecules would be drawn through the membrane. If this works, then the vacuum acting on the water would cause the water's own molecules to lose their cohesion. http://i979.photobucket.com/.../reconfig_zps96c7b1d9.jpg What might be missed with vacuum is that having an extreme vacuum above the water would not effect it's flow, just it's physical characteristics. And while a true vacuum pump might lower the air pressure only, if a column of water were 2 meters tall and held 2 liters of water with an are of 20 cm^3 that it is taking suction on, drawing it down with a piston type pump would mean that if 20 cm^3 of water were pumped out, the air pressure would be 1/2.Evacuating water would create vacuum equal to the vol. of air it is expanding.

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  1. If someone knows a physicist, here are a few questions you can ask them. If there are 299,200 molecules of gas in a 1 cm^3 area and 290,000 molecules are removed, you would have 9,200 molecules being excited because of a negative potential. As a result, the gas molecules (air) should try to draw a charge from the water below it. As a result, water may reduce it's size smaller than when it is 1C because it would be reacting to the negative charge of the negatively excited molecules of gas (air). Basically, the negatively excited gas atoms would increase linear momentum in a water molecule while it's KE is not increased. This should cause a water molecule to constrict itself to conserve it's own momentum. I use 299,200 to represent no vacuum and 9,200 to represent 29.00 hg's of vacuum.