How can you make a lot of water come out of chicken by freezing and denaturing it?

A freezer is a very dry place and uncovered meat will eventually have all of its moisture pulled out of it. This is called freezer burn.

First of all- don't try the freeze-thaw-freeze-thaw idea. This would be a good way to start your own colony of interesting, meat-eating bacteria.

There are two techniques to minimizing freezer damage- freeze the food quickly to keep ice crystals small and seal it tightly to keep it from drying out. You should do the opposite.

Put your meat in a freezer bag and inflate it with air before sealing it. Then wrap the bag in a towel or other insulative cover. Freeze for a while. The chicken will freeze relatively slowly which will rip its cells up nicely. All the air in the bag will ensure that moisture is drawn out of the meat over the course of many days.

This will, of course, leave you with tough, inedibly dessicated bird meat and flavorless water. It's probably a delicacy in some culture somewhere.

You could experiment with the brine but I wouldn't. The salt in a brine will help keep meat proteins from over-coagulating when heated- it wouldn't have the same effect when the proteins are frozen and dried. At worst it would prevent water loss- at best it would just dry back out of the meat and you could have just frozen the brine without wasting the chicken.

An answer to your edited points.

Number 4. Pores don't do much during cooking. It is about cell walls and proteins. A pore is a channel constructed from zillions of cells (like a tunnel constructed from bricks). A cell is like a bubble (the cell wall) filled with liquid (the cell plasma). The cell wall is made from zillions of proteins, like a hat knitted from wool. In freezing, the plasma turns to sharp ice crystals and tears the cell walls apart (like poking holes in a hat).

Then under heat, the proteins unravel the way you could unravel a knitted hat if you tugged at it. If you cook the meat just a little, the proteins remain bushy and soak up liquid. If you overcook it, they stretch and start looking like a long, smooth thread and can't soak up water and/or cell plasma any more. The meat tastes dry and unpleasant.

Freezing the meat is just bursting the cell walls. Unravelling the proteins is denaturation. They are two different things.

Number 1. More water does indeed mean more damage to the cell walls. No denaturation happens there, as explained above. But you can't change the amount of water within the chicken cells in any way while it lives. This amount self-regulates, like blood pressure. If you feed the chicken more water, it will excrete more water, not store it in its cells.

Number 2. You want lots of air around the chicken if you want to get ice crystals buildup on its surface. That's why Sobachatina suggested an inflated bag - to keep air around it. Also, unpacked chicken will make your freezer dirty and contaminate other food with uncooked meat juices, which is dangerous.

Number 3. As far as I know, water ice expands while cooling from 0 to -4°C and then starts shrinking. Most damage is done while the crystals expand, so I suppose that most of the damage will be completed within the first 1-2 days (depending on how long it takes for the complete chicken to cool to -4°C).