Buoyancy device by phase change of water to ice

[sm0ky2]

Thanks again.

I gave very little detail, sorry

In my mind the ice was placed into the the insulating container after freezing.

In my mind the the refrigeration system remains at depth.

This helps, we can simplify a lot of things now.


So, if say the refrigerant system allows intake at depth
And the ejection port faces upwards:
The change in buoyancy could be harvested directly.
Then its a matter of depth vs cooling energy (electric or compression or ?)
Would need a large volume of water, not merely a column, to prevent cooling of the reservoir

[Cloxxki]

considerations ..

The most change in volume per degree of temperature change.

Use of ambient temperature can bring water into very near to the phase
change temperature, either side, higher or lower.

Got other ideas - info ?

I lost my lengthy reply.
Short version: look into temperatures and depths. I suspect close to freezing water will prove very hard to find.
It would be a cool experiment to make an ice cube near the surface and at the bottom of a lake, same water temperature, compare the energy needed. How much energy could be extracted needs to be realistically assesed.

I like tidal flows more. Only side effect might be that when we hamper ebb and flow, we're making the moon crash into Earth. It's only logical.

Here's an ancient Dutch concept for a tidal like in the North Sea.
My favourite thing about it is that this form of construction gets more efficient as it's built bigger.
Twice the length of surrounding structures...4x the water contained/drained per tide flow.

[Willy]

This helps, we can simplify a lot of things now.


So, if say the refrigerant system allows intake at depth
And the ejection port faces upwards:
The change in buoyancy could be harvested directly.
Then its a matter of depth vs cooling energy (electric or compression or ?)
Would need a large volume of water, not merely a column, to prevent cooling of the reservoir

Conditions required.

1. near freezing temperature water
2, water with great depth.
3, " large volume of water, not merely a column"

   "Then its a matter of depth vs cooling energy"

I think that with careful design and selection of installation location,
such a design could do more out than in. 

An illustration to follow...

[Willy]

Cloxxki

Tidal harvest is a great way to go.

[Willy]

Vertical Ice sheets inside over sized insulating sandwich bags.
with a slow rise and descent, to minimize friction.
Thin sheets can exchange temp more rapidly than cubes (more exposed surface area).

Gear box below, magnetic linking from gear box to refrigeration unit's
mechanical drive.  ? ? ?