peltier junction
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Does anyone have experience in using peltier junction as a heatsink?
- jdmlight
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Re: peltier junction
Well. A peltier junction doesn't eliminate the need for a heatsink. It makes one side of it cold and the other hot in proportional amounts. So if you're using the cold side of it to cool off something that's hot (like a processor), you need a pretty hefty-sized heatsink to make it work.beeps8 wrote:Does anyone have experience in using peltier junction as a heatsink?
In short, they're not magic. You still need a way of dissipating heat on the hot side. These are often used with liquid cooling in PC's as an effective way to transfer the heat from the processor to the liquid flowing through the peltier junction.
They work the other way too, in fact, they're often used in those beverage coolers you can plug in to your car.
--John (and please call me John, it's really weird to be called by my username)
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Re: peltier junction
Would the heatsink need to be larger or smaller than the original? What temp difference should I expect using?
- jdmlight
- Posts:795
- Joined:Thu Dec 27, 2007 11:17 pm
- Steam ID:jdmlight
- Location:A boring suburb of Chicago.
Re: peltier junction
Informative link is informative.beeps8 wrote:Would the heatsink need to be larger or smaller than the original? What temp difference should I expect using?
--John (and please call me John, it's really weird to be called by my username)
Fight MS Paint abominations! If you don't have a camera, go here, and pick something 3 megapixels or higher.
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Re: peltier junction
the basic rules of thumb for peltiers:
1) if you go beyond their capacity, they become very efficient heaters of both sides of themselves.
2) for every watt you want to cool, you will need another watt of cooling capacity beyond that (60 watt cpu? 120 watt cooling for peltier!)
3) you must make everything on the cool side completely airtight and insulated, or you will get condensation and thus electric shorting of your cpu and motherboard. fast.
4) they suck power at 12-15v... a lot of it.
In short, it's just not worth it. Cool the cpu well with water or heatpipe based air cooling and you will get better results for the same cash money spent in the end.
1) if you go beyond their capacity, they become very efficient heaters of both sides of themselves.
2) for every watt you want to cool, you will need another watt of cooling capacity beyond that (60 watt cpu? 120 watt cooling for peltier!)
3) you must make everything on the cool side completely airtight and insulated, or you will get condensation and thus electric shorting of your cpu and motherboard. fast.
4) they suck power at 12-15v... a lot of it.
In short, it's just not worth it. Cool the cpu well with water or heatpipe based air cooling and you will get better results for the same cash money spent in the end.
Jaqie Fox, Genuine girl techie | http://foxtecha.com