Buoyancy device by phase change of water to ice

[panyuming]

Study the phase transition of liquid-gas with a volume change greater than 500 times,
and the liquid-solid phase transition with a volume change of 1.08 times,
Obviously more likely to succeed.

[Willy]

Study the phase transition of liquid-gas with a volume change greater than 500 times,
and the liquid-solid phase transition with a volume change of 1.08 times,
Obviously more likely to succeed.

Thank you for your responses.

The gases in response to the pressure due to submersion within fluids compress.
That compression is also an increase in the density of those gases.

Increased density means also, decreased buoyancy.

These two factors balance out nicely in all buoyancy devices based upon that method.
This results in a zero net gain in those devices when the heat energy within the gases
remains equal (when submerged and not submerged).

Sufficient temperature differences (from environmental exchanges) and the resulting gas
expansions and / or contractions can, no doubt, cause a buoyancy device to function.

EDIT...

If you know of a gas that does not conform to Boyle's law, please post it here.

Also, if your are aware of a substance that meets   ALL  of these criteria below ...

1. change in volume per calorie of heat is greater than the water to ice phase change.
2. can exert greater than 25,000 psi as a result of that phase change.
3. does not decrease in density as a result of an external pressure applied of 29,000 psi.
4.  an external pressure applied of up to 29,000 psi does not prevent that phase change.

EDIT
3. does not INCREASE in density as a result of an external pressure applied of 29,000 psi.

[Willy]

A 14,092,800 joules to 4,184,000 joules of energy ratio or a

3.3682 joules out    to   1 joule in ratio.

next

Release the latch on the 16 cubic centimeters (16 square centimeter surface area piston)
x 80,000 centimeters long float, now that it is at the surface / at sea level.  It has a
vacuum relative to sea level air pressure.

That vacuum was 16 square centimeters by 1 cubic centimeter by 80,000 centimeters
in relationship to a water depth of 1101 meters.  Now, at sea level, the vacuum is in
relationship to 1032.8092  grams per square centimeter (gsc) or 14.69 psi.

Some more energy out...
1032.8092  gsc of vacuum in the syringe relative to the sea level air pressure times
a displacement of 16 cubic centimeters times 80,000 centimeters as water volume
drawn in (outer side of syringe piston) before a pressure equilibrium is reached.

Now empty (full of water on the outside of the piston), the float/ syringe is again
neutral buoyant in the water. Send / tow it back down, under power of the next
rising float.

And

we still have some chunks of ice riesing, the buoyancy of which we can also harvest.

The fluids, gases used, depths, pressures, volumes and ratios are intended only as
exemplary. Other  fluids, gasses used, depths, pressures, volumes and ratios in some
part or in total, can be applicable to the method presented.

EDITS

[Willy]

.. ..

[kolbacict]

Release the latch on the 16 cubic centimeters (16 square centimeter surface area piston)
x 80,000 centimeters long float, now that it is at the surface / at sea level.  It has a
vacuum relative to sea level air pressure.

It all need drawing.