Buoyancy device by phase change of water to ice

[Willy]

These methods can function with liquid to solid phase changing
substances other than water.  Any expansion greater than 8% 
is of course desirable. As long as its not ice 9.

             hill billy willy

[TommeyReed]

I was going to do a air conditioning project using ice.

Working with AC companies in the past, I realize a 1 ton unit in the old day was 1ton of ice.  But from the phase change of  32deg to 33deg to liquid the block of ice would produce 288,000 btu in a 24 hour time.
1 ton = 12,000 btu in 1 hour.

I was doing research using a efficient low power freezer of 120 watts to super chill water for campers, using solar during the day.

At night time a small low power pump could be used to convert that into cooling.

Tom

[Willy]

very nice

[Willy]

Keep in mind this is a liquid fluid, not a gas.

[Willy]

We increased the buoyancy, by freezing the water cube which surrounds the
neutral buoyancy cube at its center, more so than if we had frozen the water
while it was still in the trough.
    because...
We had already increased the ratio of its exterior surface area (exterior volume) to
its mass, before it was frozen.  Once frozen, The combination of the hollow ice cube
and enclosed solid cube are less dense than the equal mass of frozen water in the
trough.

The frozen water cube, will be more buoyant in water than will be the equal mass of
water as frozen in the trough.

The solid cube, alone, which is centered within the frozen cube is buoyancy neutral
in water.