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TEC laptop cooler

post #1 of 7
Thread Starter 
An idea occured to me just now... Is it at all possible to put a 50w peltier cooler on a lenovo w700? Like: Hook it up to the battery, put a toggle switch on it so it doesn't kill my battery life, and a variable resistor to control how 'on' it is to avoid condensation.

Anyways, I most likely won't ever do this, but it was one of those thoughts that I get that make me wonder if it is doable...
post #2 of 7
I dont think it is possible, peltiers require another aux. power supply to supply it with the right voltage. Good idea though respect the thought lol biggrin.gif
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i3 Overclarking
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post #3 of 7
Wire it up to an external power connector, find a laptop brick that supplies adequate power (like the Dell XPS bricks, some are 130w+), and power it only when you're not on battery.
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post #4 of 7
If you put it on a power brick meant for a laptop, you need to figure out it's max voltage the brick can supply, then figure out how much current the TEC will pull at that voltage and check the brick to see if it can supply that many Amps. Otherwise you may cause a fire biggrin.gif or best case scenario the brick dies.

If you are using a TEC from eBay, the current pull is alot greater in comparison of Voltage vs Current than that from a major TEC supplier with a higher couple count.

eBay TECs = 127 Couples (usually 15.4Vmax, best run at 12V, High Current Draw)
Supplier TECs = 227 (I think, may have to double check) (around +28Vmax, best run at 22V, Lower Current Draw for the same Power Usage as a 127 couple)
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post #5 of 7
How are you planning on cooling the TEC? TECs are basically heat pumps, they pump head from the cold side to the hot side. They also generate their own heat, and lots of it, the TEC outputs more heat than whatever you're cooling it with. Unless you plan on carrying around a radiator box hooked up to the TEC it's not really practical.
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post #6 of 7
Hi,

There are 2 major problems with this that will prevent you from doing it.

Both have been explored above i.e. the it will be the current that is your problem not the voltage when powering the TEC.
Assuming you can power the the TEC presumably at close to full power the heat off the hotside will be a problem it could easily be as much as 120w a lot would depend on its running parameters. As the poster above said TEC's are NOT coolers per se they are heat pumps and the heat they pump needs to be removed from the hotside along with the heat internally generated by the TEC. This is something that does not usually pose a problem with a small TEC like this, a standard CPU heatsink and fan combo on the hotside will suffice.....but in a laptop ? no chance....

Of course there is the point that if you need to remove an installed cooler to add the TEC.....50W (bearing in mind you wont actually get 50w even at 12v.) it is most probably going to be worse than the cooler you took off....therefore it is pointless.

Which brings me to the final point that if your thinking you just put a peltier inside the case and power it......Ah.....if thats the case you have absolutely no idea how peltiers work and I'm sorry but it is a dead cert 100% no go.
Edited by zipdogso - 2/4/11 at 9:41am
post #7 of 7
^
I couldn't agree more.

The only thing I could suggest, If the base of the laptop is ventilated. Then you could make a laptop stand with a built in TEC air conditoner, or you could make a custom waterblock, and use an external watercooling system. However its still not practical and pointless.
Edited by xtremetechuk - 2/4/11 at 10:09am
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