I seek thy knowledge, o'ye cooling gurus...

[CreePinG_DeatH]

Ok.... I am still designing my cooling rig, I almost have my 3-d model of my heatsink/waterblock done. What i need to know is about refrigeration- well sorta...

Say any given drop in freezer is capable of removing 45 watts of heat from room temperature. Now, say I have a water supply being channeled against the side of the freezer in a 'S' pattern, like any given waterblock. After a given distance, say 5 feet of being cooled, the water has the 45 watts of heat removed. Now if that already cooled water continues for another 5 feet, will it continue to drop in temperature? I would assume that it wouldn't remove another 45 watts. But to what extent does the cooling process continue?

If you need me to try to explain it better I will. Thank you.

[Diggrr]

I couldn't begin to 'model' what temperature you'd end up with.
That's the cost of being the first to do something...no data to chart a result.

Only way to find out is to try it. Heck, if you could get out all 90+ watts, that would indeed be a chilly chip. (assuming that half your water was very cold, and half at room temp when you switch on the system) The average temp you'd get as the system got running would be below room temp and stay there (heat loss and heat gain being the same).
The only way to drop from there would be to take out more heat than the processor makes.

[CreePinG_DeatH]

Well I understand what you are saying, but what I was trying to imply is that if a refrigeration unit is said to cool "n" Watts, then will the water continually get colder the longer it stays in the refrigeration unit? Or only after it removes the rated "n" watts of heat?

[azhari]

If it's rated for "n" watts from room temperature it means that it removes that much heat compared to room temperature. There is no refrigeration on earth that can remove "n" watts for ever :D

[CreePinG_DeatH]

ok now we're getting somewhere. And by room temperature, I assume it's the air that cools the radiator of the freezer?

Ok now since my first question is answered, I guess I should figure out how much surface area of the freezer is needed to cool the water disipating all of the heat possible. I mean if it takes the whole fridge then so be it, but i doubt it will if I design this thing correctly. I would like to leave a small portion of the freezer so I can watercool the northbridge/southbridge and the GPU....

[CrystalMethod]

Depends on a bunch of factors, shuch as insulation once it leaves the refrigeration unit, ambient room temperature outside the refrigeration unit, liquid used. But all in all if the CPU is kept at a constant load, and the ambient room temperature is kept constant. After a few hours/days, it will reach it's equilibruium, and you'll find your high point.

[CreePinG_DeatH]

would anyone happen to know if in a drop in type freezer, the cooling power is divided evenly by all 5 sides (bottom and 4 sides?) Or does it really depend on the manufacturer and I would have to ask them?

[Diggrr]

It depends on the manufacturer. I doubt any of them would cool all 5 sides.

[ButcherUK]

Ok, this is how it works. If you have a 45W cooling system (freezer) and pump 90W of heat to it from your cpu then the net result is the refrigerant will gain heat at a rate of 45W. This will cause it to overheat and die pretty quickly.

After a given distance, say 5 feet of being cooled, the water has the 45 watts of heat removed

You theory about it being in the freezer twice as long for twice as much cooling power doesn't work. The amount of cooling isn't linear like that - you'll never get the full 45W because of diminishing returns, you can only get very close. The freezer will cool more at first due to the higher temperature differentuial, then as the water cools it'll cool less and less per foot. Staying in the freezer twice as long will give a little extra cooling but nothing like double. You still won't exceed the max cooling though.
If you have a 90W input you pump in 90 joules each second in the water. Having the water in the freezer longer doesn't change this at all, the difference is in conduction, it might take you say 5 feet to dump 80W or 3 feet to dump 60W. If you don't stay in there long enough it'll not dump enough heat and your water will get hotter and hotter, on the other hand as the water gets hotter it'll dump more heat due to the greater tempterature difference. Of course if your freezer isn't rated high enough it'll get hotter anyway as the freezer overloads.

[CreePinG_DeatH]

Excellent.... Thanks for the information everyone... this is what I needed.

Ok since the freezers don't cool on all 5 sides, then it would be pointless to route the water against any of them besides the cold one.

The next step is to see how I can get a larger compressor to work with a smaller freezer.... ;-)