CPU Cooling Concept

[remember300]

right i do mechanical engineering and this is possible, i am going to try out a system hat uses latent heat that is nasty heat generated from a cpu and using a thermoelectic plate turn that heat into energy and doing rough math in my head i think an OCed card could generate enough energy that would normally be wasted to run a fan
Let me know what you guys think i will be constructing this around july time

in the mean time id like some suggestions of cheap boards that allow a dual or quad core CPU onboard that has been known to generate alot of heat. cheap would be nice im not after performance atm just electricy generation

 

[Conelton]

Well, Dexter, that sounds pretty ambitious but if you can pull it off it sounds pretty useful. I'm no engineer but if the fan is running on the heat energy from the CPU then would that mean that the fan would speed up when the processor gets hotter? Like a natural fan curve, because that would be awesome.

 

[remember300]

yes it would and im just guessing but my i7 gets up to 55 degrees and uses 60 Watts with heavy cooling, compared to stock anyways. and i think with stock cooling it will hit 80 so thats at least 25 degrees of heat to use and i recon 10 watts of that 60 is going to heat.
so given 50% efficiency from a first run could run a 12v fan at 5-6v and as you said as the temps climb the more heat is absorbed the faster the fan spins cooling the case(if its in one) and using up that heat energy up productivly. i also thought about being used to tricle charge a UPS if you had multi GPUS and things running off of it too

 

[Conelton]

Sweet. Looking forward to seeing it take shape.

 

[remember300]

when i have money this forum will have all the updates ... lol and if a pc company comes out with it ... it was my idea first!

 

[paulstung]

Nice idea dude . Wasn't there an anouncement a while back about some big company about to release something along those lines , I think they managed to power led's ?

 

[remember300]

i dunno they do it on big units that generate alot of heat i just had the idea as my rig increases the temp in my room by about four degrees. ive also thought about using sterling engines in biomass units to use some of the heat of bio degradation ...
and my idea would only be ok for medium OC i dont think it would be better than sub zeros

 

[remember300]

and yes they have paitented something ... over 13 years ago
and this
http://www.google.co.uk/patents?hl=...ge&q=cooling cpus with thermoelectric&f=false

 

[Eyal]

First off, I use a thermoelectric plait on one of my rigs, 3930k.
Using it to generate power to run a fan wouldn't be a good idea, because the thermoelectric plait is a very poor thermo-conductive. So it will fry your CPU really fast, faster that without any heat sink.
However you can do an opposite effect from the Seebeck effect. You can plug it to power and it will carry heat away from your CPU. If you get your hands on the right plait I'm sure you can get a 3930k @ 4.6 GHz with a cheap cooler and easly keep under 50c under load!

 

[SeekaX]

sound a bit like a perpetuum mobile. cool the card by using the heat of the card. it could work though, it's not like you are going to absorb all the heat. go try it.

 

[Eyal]

It's not a perpetuum mobile!
If you are referring to what I said: it isn't going to generate power. But use a little amount of power to carry a lot of heat away. I do it! It's awesome...
If you are referring to what he said: it's not, not even close! A thermoelectric generator has a very poor efficiency; 15%~25%, and it's a poor thermo-conducter! So it will fry the CPU really fast!

 

[Eyal]

I remember now the name of that opposite Seebeck effect, it's call Peltier effect!

 

[remember300]

or ill rig it up to a sterling engine i designed that will draw the heat well

 

[FredEx]

or ill rig it up to a sterling engine i designed that will draw the heat well

Now that sounds very interesting!

 

[remember300]

Once i have some spare cash a crappy mobo some crappy ram and cpu then i can get testing in work we sell a msi media kit which is enough to get the standard user a hdmi out and enough cpu power to word process for about £100 with abiut 4gb of ram can a dual core hit the same tenps of around 50-70°c ? Ive only dealt with four core and old single cores.

 

[ToffieBoer]

I am not so sure,the Sterling engine can create a lot of vibration and the further you get it away from your PC the less effective the heat transfer will be. What sort of flywheel speeds will you need to get any sort of pressure from a Fan.
As for the Thermoelectric Idea:
I know these plates will only make microVolts but what kind of power draw can you expect, With the CPU temperature changing how will you controll the Voltage for the fan! If you increase the Voltage of the Plates(DC transformers), changes in Temperature will exponentially effect the voltage on your output. Just curious!
Are you designing your own plates or getting (tried and tested) commercial one's? I like the idea but these plates need big differences in Temperature to be effective... and if your cold plate would be at room temp. the difference will become even smaller.

But I'm interested none the less.

P.S. I'm studying to become an Electronic Engineer.

 

[remember300]

im not after anything consistent. its just to take the heat energy generated and turn it into other forms of energy. just to use it up
and ill probs be making my own plates, since i got a donated machine, last night. i dont know the specs of it till i boot it up