Could you mod a reverse cycle air conditioner into some crazy water/phase change CPU cooler?
- Thread starter dug777
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quakefiend420
Lifer
- Aug 26, 2004
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Originally posted by: dug777
By just running the coolant pipe through a water block on the CPU?
that would be schweet
Overclockers at our best
I can just imagine an A64 X2 at 3.5GHz...for about half a minute until condensation kills the CPU :laugh:
quakefiend420
Lifer
- Aug 26, 2004
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Originally posted by: dug777
nah, iu mean run the coolant through a water block heatsink
you'll still have condensation...that forms based on temp, not whats causing it
How about you have the A/C cool a secondary "cooling" water block, circulate your water through it.. and then just have a normal watercooled setup?
lol..
I've thought about doing this lots, only using peltiers to cool the cooling block....
lol..
I've thought about doing this lots, only using peltiers to cool the cooling block....
- Oct 13, 2004
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Originally posted by: quakefiend420
Originally posted by: dug777
nah, iu mean run the coolant through a water block heatsink
you'll still have condensation...that forms based on temp, not whats causing it
well then just insulate the hoses and block inside and out, double layer style, the the hoses and blobk stay at room temp on the outside, and chilled on the inside and where they bond to the cpu...
quakefiend420
Lifer
- Aug 26, 2004
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i don't get it...cool the water in the primary loop with the chilled water from the secondary loop attached to the ac or what?
quakefiend420
Lifer
- Aug 26, 2004
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Originally posted by: dug777
Originally posted by: quakefiend420
Originally posted by: dug777
nah, iu mean run the coolant through a water block heatsink
you'll still have condensation...that forms based on temp, not whats causing it
well then just insulate the hoses and block inside and out, double layer style, the the hoses and blobk stay at room temp on the outside, and chilled on the inside and where they bond to the cpu...
thats exactly what people do in those kind of cooling setups
- Oct 13, 2004
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Originally posted by: quakefiend420
Originally posted by: dug777
Originally posted by: quakefiend420
Originally posted by: dug777
nah, iu mean run the coolant through a water block heatsink
you'll still have condensation...that forms based on temp, not whats causing it
well then just insulate the hoses and block inside and out, double layer style, the the hoses and blobk stay at room temp on the outside, and chilled on the inside and where they bond to the cpu...
thats exactly what people do in those kind of cooling setups
awesome, might have to steal my folks old reverse cycle
No, it's all the same loop...
The water flows through the pump, through the first water block which is cooled by peltiers(or whatever).. now the cooled water travels through the CPU water block, and back to the pump..
Pretty much a traditional setup, except a cooling block instead of a radiator, I guess?
quakefiend420
Lifer
- Aug 26, 2004
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quakefiend420
Lifer
- Aug 26, 2004
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pelts generate a LOT of heat...i think it would end up being counter productive in the end...now if you put the peltiers on the cores instead of waterblocks and used the water loop to cool them, that would work better, i would think
Peltiers don't necessarily generate a lot of heat.
My 1 volt peltier, for example, doesen't.. well, in the scheme of things.. Only 6.5 watts.
It wouldn't be counter productive, no. Obviously, you would have to size the hot side heatsinks for the ammount of heat you're dissipating, both from the load and the peltiers themselves.
With a radiator.. the limit is ambient air temp, obviously. You'll never get the water below that. However, with a peltier cooled setup.. you could get the water as cold as you wanted it. Ideally, unless you're prepared to deal with condensation, you would have a temperature controller on the peltier that kept the water at just above the condensation point.
If you really wanted to be hardcore, you could take care of the condensation problem, use anti-freeze and go below freezing...
I'm not sure which would technically work better.. I suppose putting the peltier directly onto the CPU would be more energy efficient, at least.. but you could probably get lower temps by cooling the water to below freezing..
quakefiend420
Lifer
- Aug 26, 2004
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Originally posted by: Eli
Peltiers don't necessarily generate a lot of heat.
My 1 volt peltier, for example, doesen't.. well, in the scheme of things.. Only 6.5 watts.
It wouldn't be counter productive, no. Obviously, you would have to size the hot side heatsinks for the ammount of heat you're dissipating, both from the load and the peltiers themselves.
Obviously, with a radiator.. the limit is ambient air temp. You'll never get the water below that. However, with a peltier cooled setup.. you could get the water as cold as you wanted it. Ideally, unless you're prepared to deal with condensation, you would have a temperature controller on the peltier that kept the water at just above the condensation point.
but why have the peltiers if you're not going to go sub-ambient?
also, the temp of the water isn't going to change instantly, so its going to be hard to keep it right at the condensation point...if you have high cpu load for a long period and it's compensating for that, as soon as the cpu goes idle the temp is going to start dropping quickly, which means less heat introduced into the water...also the ambient temp might change too rapidly for the temp control system to keep up with...which can lead to condensation...i just think that for the noise level and cost involved, you would be better off to water-cool the pelts...just my 2 cents
quakefiend420
Lifer
- Aug 26, 2004
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i doubt you would get the water below freezing with just one pelt...unless it was a monster and it dimmed your lights when it kicked on
at that point i would just go true phase change and create a water chiller from an old ac unit and be done with it
theres a lot of articles on people doing just that...give me a second i'll dig one up for you
check this out
WRONG Forum.
Waah;
that said,just run a dryer vent hose from your cool air source,to the air intake side of the tower.
My current setup,is running fine,lol it says its 55c hahahaa
no cool air for me,i guess i need to turn the front fan back on! Mumble :|
Waah;
that said,just run a dryer vent hose from your cool air source,to the air intake side of the tower.
My current setup,is running fine,lol it says its 55c hahahaa
no cool air for me,i guess i need to turn the front fan back on!
Mumble :|
quakefiend420
Lifer
- Aug 26, 2004
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Originally posted by: Acanthus
That and the fact that you cant use water with cooling that powerful
Straight antifreeze maybe.
50/50 mix of antifreeze and water will work just fine...unless you're getting down into the -80C range or so...and you have to have a triple cascade setup to get insane temps like that...it has been done though
I agree, the only real point would be to go sub-ambient... but still.Originally posted by: quakefiend420
Originally posted by: Eli
Peltiers don't necessarily generate a lot of heat.
My 1 volt peltier, for example, doesen't.. well, in the scheme of things.. Only 6.5 watts.
It wouldn't be counter productive, no. Obviously, you would have to size the hot side heatsinks for the ammount of heat you're dissipating, both from the load and the peltiers themselves.
Obviously, with a radiator.. the limit is ambient air temp. You'll never get the water below that. However, with a peltier cooled setup.. you could get the water as cold as you wanted it. Ideally, unless you're prepared to deal with condensation, you would have a temperature controller on the peltier that kept the water at just above the condensation point.
but why have the peltiers if you're not going to go sub-ambient?
also, the temp of the water isn't going to change instantly, so its going to be hard to keep it right at the condensation point...if you have high cpu load for a long period and it's compensating for that, as soon as the cpu goes idle the temp is going to start dropping quickly, which means less heat introduced into the water...also the ambient temp might change too rapidly for the temp control system to keep up with...which can lead to condensation...i just think that for the noise level and cost involved, you would be better off to water-cool the pelts...just my 2 cents
You would have to use a PID(Proportional Integral Differential) temperature controller, AKA "smart controller". Instead of simply turning the peltier on and off, it uses a pulse width modulation system to vary the duty cycle. As you approach the goal temperature, it slowly throttles down. Conversely, as you stray from the goal temperature, it throttles up in proportion to the temperature rise.
If you sized your peltier cooling bank correctly(read: make it big enough), it would keep it at exactly the temperature you set it, plus or minus 1 or 2 degrees, regardless of load.
It's not a new idea or anything, there are plenty of people that have done it.
You could water cool the peltiers and use a radiator to cool them instead of heatsinks and fans, if you wanted. The point is that you could get the water well below ambient, and even below freezing, if you so desired.
You could do so with a peltier directly on the CPU too...... But some people like to build things, ya know?
lolI've been working with peltiers a lot lately... I have a monster 100+W unit that I'm putting into a big 60 quart cooler to take camping.
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