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TEC Liquid Chiller suggestions. - Page 3

post #21 of 33
Thread Starter 
So if I get 400 watt peltiers, what would be the best voltage and amperage to run them at for the highest efficiency?
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post #22 of 33
At 12 volts they will draw roughly 13 - 14 amps each.
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post #23 of 33
Run them in serial at 12v and they will draw 13amps in total. You would need an external 24v psu though. Then again you should be using one anyway.
    
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post #24 of 33
do the meanwells etc fit into a regular psu space in cases?
post #25 of 33
Thread Starter 
12V 13amps for peak efficiency then?
I'll be getting a controller, so I'll be able to select any voltage up to 27V so I'm not concerned with what's convenient, rather what's better for efficiency
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post #26 of 33
Quote:
Originally Posted by ZytheEKS View Post

12V 13amps for peak efficiency then?

Not thread invading just coming in here for a quick clarification...so 13amps @ 12v is 156 watts so does that mean this tec will is capable of cooling a 156watt component at that power draw? and what sort of delta temp hot to cold side would that give?

Just wondering what sort of pelt power consumption would be needed to cool my 2700k @5.5ghz which draws 140watts.
Edited by technogiant - 4/1/13 at 12:02pm
post #27 of 33
A 5.5ghz sandy is well over 140 watts of heat output!

You will need a ton of TEC power to cool that...a quad 400 @ 12v will do the trick, or dual chillers, but a single TEC would not be feasible. Maybe a dual stacked direct die, but it will take a ton of radiator to keep them cool.
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post #28 of 33
Quote:
Originally Posted by Puck View Post

A 5.5ghz sandy is well over 140 watts of heat output!

You will need a ton of TEC power to cool that...a quad 400 @ 12v will do the trick, or dual chillers, but a single TEC would not be feasible. Maybe a dual stacked direct die, but it will take a ton of radiator to keep them cool.

Well 140 watts is the figure the software application gives me and thats running IBT on max....not sure now is it cpu-z....tells you your clock speed vcore and current cpu wattage.....still a 4x400 a@153watts plus around 140watt for the processor thats gonna be >750watts just for the processor....I'm afraid that will be far too much just for the cpu to contain in my chill box...anyway thanks Puck...just exploring options atm.....I'm not sure if I'm right but as I understand it tecs don't perform too well in the lower temps of a chill box...is that correct? I'm guessing if I throw two powerful gpu's in there non tec cooled at about 400watts each so the system and tec's pulling around 1600watts a guestimate of my loaded chamber temp would be -8c...so with cooling at that sort of level on the tec hotside what coolside cpu temp could I expect?
Edited by technogiant - 4/1/13 at 9:55pm
post #29 of 33
Quote:
Originally Posted by technogiant View Post

Well 140 watts is the figure the software application gives me and thats running IBT on max....not sure now is it cpu-z....tells you your clock speed vcore and current cpu wattage.....still a 4x400 a@153watts plus around 140watt for the processor thats gonna be >750watts just for the processor....I'm afraid that will be far too much just for the cpu to contain in my chill box...anyway thanks Puck...just exploring options atm.....I'm not sure if I'm right but as I understand it tecs don't perform too well in the lower temps of a chill box...is that correct? I'm guessing if I throw two powerful gpu's in there non tec cooled at about 400watts each so the system and tec's pulling around 1600watts a guestimate of my loaded chamber temp would be -8c...so with cooling at that sort of level on the tec hotside what coolside cpu temp could I expect?

That processor is over 200 watts of heat output, maybe even 220(!).

TECs work on a Delta, with varying efficiencies based on temperature, but basically the colder you keep the hot side, the colder you can get the cold side smile.gif. They will work just fine in a chilled box setup, and will love the cooler hot side temps.

The 400watt tecs are that recommended for modern CPUs are rated 400w QMAX @ 24 volts. TECs run more efficient undervolted though, so they are much more manageable at 12v. With that voltage, they are around 160watts each and pull 12-13amps. That means two @ 12v may have a hard time getting very low temps with that processor at full load, but they may be able to handle it inside of a low ambient box.

The bad part about TECs is that they don't slowly rise in temps when they reach their heat pumping limits...they hit a brick wall and temps quickly go from very low to very bad ad they essentially become an insulator. Same thing happens if you cannot cool the hot side well enough, which is why it takes tons of rads on the hot side because you want the water on it as cold as possible so the cold side can get as cold as possible itself.

They are a lot more tricky then it seems on the surface to get it right, but they are definitely a feasible way to get below water cooling temps 24/7.
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Behemoth
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RAMHard DriveCoolingCooling
2X4GB Patriot Viper Extreme 1TB Velociraptor 10k RPM w/ 64MB Cache Two Arqtik TEC Chillers in Series Archimedes TEC block w/TN660 TEC 
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Two Ported/tapped MCP655 Pumps 2x Black Ice GTX 480 Gen2 Rads DD dual drive bay Res with LCD water temp monit... GPU Loop: Modded Enzotech Sapphire CPU blocks, ... 
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post #30 of 33
Thanks for all your input Puck.....that has helped me decide....I was just sounding out the idea but think that the heat load will be too much for the chamber to take without sacrificing the chambers cooling temperatures for my gpu's.....Think I'll just follow my plans to adapt my chill box to submerse my components in liquified refrigerant gas....on balance (if that is at all balanced ;-/ ) think that should give me pretty darn good temps any way... but thanks again for the help smile.gif
Edited by technogiant - 4/2/13 at 9:11am
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