The dreaded Peltier junction

[Lord Nicoll]

Well, I use peltier junctions a lot, usually to cool things that should be cool (but don't generate heat) or to generate power directly from heat. I have a good few of them floating around in use, but recently I ordered another bunch of the things, and when they arrive I'm gonna stick one onto my CPU (well one of the ones I don't usually use at least, a pentium G840 at only 65 watts) and see how shit they are for something that generates almost as much heat as they can move, which is were you come in, reader. Places your bets for how crap (or good, but don't hold your breath) this will work. I personally think idles maybe around 15°C-20°C, and loads to be the exact same as with a normal heatsink, while using 80 more watts and dumping said 80 more watts into the air. Then I'll try delidding the CPU and see if that makes it work better (or at least replacing the TIM, the IHS would actually make the wide peltier plate contact more of the die, as the plate is ceramic, and IHS is copper) so place your bets, the winning bets  will receive twice as much internet dollars that they place. 

Edited August 22, 2016 by Lord Nicoll

[ScratchCat]

Bet - It will have a temperature of above -273.15C in all states.

[Lord Nicoll]

Just now, ScratchCat said:

Bet - It will have a temperature of above -273.15C in all states.

I'd say there absolutely zero chance it will be below or above that, as it's state will be both above and below it simultaneously until observed.  

Edited August 22, 2016 by Lord Nicoll
fixing spelling error

[KE2012]

What power rating is the Peltier Cell? 

EDIT: And how are you cooling the hot side of the cell?

[Lord Nicoll]

Just now, KE2012 said:

What power rating is the Peltier Cell? 

EDIT: And how are you cooling the hot side of the cell?

it's rated for 60-80 watts (relatively medium, but things from china tend to vary so I'll be measuring it myself) and I'll be using a basic aluminium fin stack on a copper plate. I might try using an evo 212 to see if that helps.

[KE2012]

Just now, Lord Nicoll said:

it's rated for 60-80 watts (relatively medium, but things from china tend to vary so I'll be measuring it myself) and I'll be using a basic aluminium fin stack on a copper plate. I might try using an evo 212 to see if that helps.

Yeah, I have also messed around with peltier cells to try and make a rapid beer cooler and the cells from China were often far from what they were rated to be. As for the cooling I doubt the basic aluminium stack will be enough if it's like the one I have, the evo212 however might be another story if you can mount that on your mobo with the peltier cell installed. 

[Lord Nicoll]

Just now, KE2012 said:

Yeah, I have also messed around with peltier cells to try and make a rapid beer cooler and the cells from China were often far from what they were rated to be. As for the cooling I doubt the basic aluminium stack will be enough if it's like the one I have, the evo212 however might be another story if you can mount that on your mobo with the peltier cell installed. 

The cells are relatively thin, but I'm also an advanced fabricator (but the evo 212 mounts will work, they're tall enough) even if they don't I can go to workshop and modify it. I would buy it from somewhere like rapid electronics if this was for a client and buy a really powerful one, but really I'd recommend against it for CPU's at least. I could try my custom water loop (I keep a set ready in case someone orders a custom loop, I built high end PC's for friends and family) 

[KE2012]

4 minutes ago, Lord Nicoll said:

The cells are relatively thin, but I'm also an advanced fabricator (but the evo 212 mounts will work, they're tall enough) even if they don't I can go to workshop and modify it. I would buy it from somewhere like rapid electronics if this was for a client and buy a really powerful one, but really I'd recommend against it for CPU's at least. I could try my custom water loop (I keep a set ready in case someone orders a custom loop, I built high end PC's for friends and family) 

Yeah a custom loop should be able to handle that cell without even breaking into a sweat. Quick question, how do you intend on powering the cell? Use the 12V rail on your PSU or are you just going to power it with a lab power supply so you can control the power?  

[Lord Nicoll]

Just now, KE2012 said:

Yeah a custom loop should be able to handle that cell without even breaking into a sweat. Quick question, how do you intend on powering the cell? Use the 12V rail on your PSU or are you just going to power it with a lab power supply so you can control the power?  

I'll probably use the 12v and then switch to a 25v 120 amp inverter pure DC welder if I feel like the PC has offended me or my ancestors. the cell is rated 12v at 5-6 amps. 

Edited August 22, 2016 by Lord Nicoll
adding information that is pertinent.

[KE2012]

1 minute ago, Lord Nicoll said:

I'll probably use the 12v and then switch to a 25v 120 amp inverter pure DC welder if I feel like the PC has offended me or my ancestors. 

Now this I want to see. Anyway my bet is high temperatures in the range of 40 for idle and 80 for load, this is on the evo, if you use the aluminum tower thingy then I think you will hit thermal throttling very quickly, maybe even on idle. 

[Lord Nicoll]

Just now, KE2012 said:

Now this I want to see. Anyway my bet is high temperatures in the range of 40 for idle and 80 for load, this is on the evo, if you use the aluminum tower thingy then I think you will hit thermal throttling very quickly, maybe even on idle. 

On the aluminium copper plate cooler, off an old Pentium 4 (the μPGA one from 2002) cooler master one, it idles at 34°C and loads never exceed 60°C, so I say the idle will be really low and the load will be about the dame (there are 4 fans in the case, two 1500 RPM 120mm and 2 140 100 RPM fans, of which three cool the area around the CPU (currently the evo 212 and an i5 is in it) but I change a lot.