cooling with a peltier ?

[labdog]

Hi,

im wondering if i can add a peltier to a watercooler system to improve the cooling ?

but i even not sure that is possible.

thanks for some advices.


if you know you don't know, the way could be more easy.

 

[labdog]

OOps, forgive, just an error.

if you know you don't know, the way could be more easy. 😎
<P ID="edit"><FONT SIZE=-1><EM>Edited by labdog on 01/01/02 06:37 AM.</EM></FONT></P>

 

[knowan]

Yes you can add a peltier to a water-cooling system, but peltiers aren't as stable as straight water cooling and with a peltier you will have to worry about water condensation.

--------------
Knowan likes you. Knowan is your friend. Knowan thinks you're great.

 

[HonestJhon]

and peltiers have a high failure rate...and demand a lot on a psu...

-DAvid

-Live, Learn, then build your own computer!-

 

[svol]

It's possible, but they are expensive, need lots of power, must be isolated and produce very much heat on the 'hot side'.
In case you didn't know: a pletier works as a kind of heat pump which transport heat from the cold to the hot side, so the cold side will get below the temp of the hot side. If you keep the hot side around 30 C then you get a cold side of about -20 C, but this will give condensation, so you'll need to keep the hot air away from the cold side and the cooled components.
I fried my own CPU yesterday probably because of some short circuit or I mounted the waterblock not good, but it's hard to see if it's mounted right because of the isolation. I will try again with a new CPU, but that will have to wait till I have enough time again (vacation is over). Getting my PC back working is the main problem, I need it for school.

My case has so many fans that it hovers above the ground 😱 .

 

[labdog]

Are you sure you can reach -20°C with it ?
How can we take off the water condensation ?
Do you know approximately the price of a peltier ?

thanks.

<i>note about your main problem:
why you don't buy a cheaper "little" duron 800 around 60€ to tide you over for now & buy another powerful one later ?</i>


if you know you don't know, the way could be more easy.

 

[HonestJhon]

a peltier can be "potted". this means that you seal it, and prevent air from getting inside of the peltier. then you use insulation to isolate the peltier from the air inside your computer. when the warm, moisture ridden air comes in contact with the really cold peltier, it condenses, and becomes water. this is bad, so usually people isolate the peltier from everything except for the heatsink and the processor.
there is also a foam filler that you can put in the small square of space under the cpu, inside the socket to insulate the bottom, incase that part gets really cold...


-DAvid

-Live, Learn, then build your own computer!-

 

[labdog]

So, with a strong insulation between the peltier & the outside except with the cpu & the heatsink, you can prevent water condensation ?

But the "foam filler" insulation between the peltier & the cpu/heatsink, is it very efficient ? (i think a "micro-drop" can involve a short-circuit & burn the cpu & this insulate mechanism seems to me not very waterproof & not very accurate)

<i>just a add-on question:
How much cold do you think we can reach with a peltier watercooler ?
Do you know approximately the peltier price ?</i>

thanks.



if you know you don't know, the way could be more easy.

 

[HonestJhon]

well, i think that the insulation that people use is pretty efficient...a lot of people use this method, and have good results.
as for how cold a peltier can get you...i would say that
-20 MIGHT be a little low, but you can get quite a bit under 0°C.
if you have a peltier with a heatsink on it, with just the cold side sitting there, it will get cold, cold enough for it to be hard to touch it.
and as for the price? well, i dont know....i know that at frys electronics near me, you can get a 75w peltier for like 15 bucks i think...(US)
but i dont know which peltier to use for an athlon...i dont know if 75w is enough. maybe it is...maybe it isnt. i dont know.but with a peltier, you need to have good cooling. you have to cool the hot side of the peltier, or the peltier will melt. the hot side that is. and then the peltier will fail, and so will yur cpu.

-DAvid

-Live, Learn, then build your own computer!-

 

[labdog]

if i understand well, you have to cool the cooler.
Is it a joke ?


if you know you don't know, the way could be more easy.

 

[HonestJhon]

nope....
a peltier works by electronically transferring the heat away from one side. and to the other..
effectively, making one side really cold, and the other really hot.
and by hot, i mean hot....hot enough to start to melt i think.
so yeah...it isnt a joke, you have to cool the cooler...hehe
so...you still need some sort of cooler, whether it be water cooling, or a nice heatsink.


-DAvid

-Live, Learn, then build your own computer!-

 

[svol]

Take a look at this site, they sell watercooling and peltiers in Europe: <A HREF="http://www.oc-shop.com" target="_new">http://www.oc-shop.com</A>.
You need atleast a 100W peltier for Athlons!

About my problem: I now have a XP1600 working in it with air cooling (CPU temp=31C), I'm very happy everything is working again (I only need to fix my watercooler if I have time for it), now I don't need to use an old P166 MHz, men those things are slow.

My case has so many fans that it hovers above the ground 😱 .

 

[labdog]

yep, i think it's a very funny cooling mechanism but if the result of is around 0*C, it may be great. haha.


if you know you don't know, the way could be more easy.

 

[labdog]

at OC-Shop.com i think to buy to more oc my Athlon 1.333@1.533 cpu:

<b>1.</b>
Kryotherm ICE-71
80 watt peltier element.
Dimensions = 40 x 40 x 3.4 mmSpecial = silicone-sealed
and

<b>2.</b>
Complete Neo- Gasket / Neo-Stuffer / Cold-Plate kit voor PPGA / FC-PGA / socket A
Complete kit for TEC use, to pevent that any condensation can occur. Comes with gasket, backplate, neo-stuffer and copper coldplate. To be used on the socket A and FC-PGA platform. Lapping kit included for free.


What do you think about, is it correct ?

<i>note1:
do you know what's a <b>Lapping kit</b> ?</i>

<i>note2:
i have already an aqua 690 cooling kit with a taïsol 4800RPM fan to cool the peltier.</i>

is something bad ?
need i something else to process a peltier ?

thanks.


if you know you don't know, the way could be more easy.

 

[svol]

A 80 Watt peltier can be used with an Athlon, although with very high overclock settings the warmth produced by the CPU will extend 80 Watt and will make cooling with an 80 Watt peltier very difficult. But for more info about pletier you beter check some articles at <A HREF="http://www.overclockers.com" target="_new">http://www.overclockers.com</A> - Tips & Techniques - Peltier section. Also search some other overclocker site's for peltier information. If you want to know how peltiers work you can look at <A HREF="http://www.kryotherm.spb.ru" target="_new">http://www.kryotherm.spb.ru</A>.
The isolation will be sufficient.

A lapping kit is a kit with which you can use to polish the copper coldplate's to a perfectly flat surface.

Keep in mind that you not only get the warmth produced by the CPU (about 70 Watt) but also a little higher warmth from the peltier (about 80 Watt), this gives a total heat of <b>150 Watt</b>.

Also a peltier sucks energy, you will need powersupply that gives about 100 Watt on the 12V line,OC-Shop has one, but they're rather expensive (I have the 200 Watt version).

If you can read Dutch I know some good articles written in Dutch, I will see if I can find some good English articles.

My case has so many fans that it hovers above the ground 😱 .

 

[labdog]

Thanks.


if you know you don't know, the way could be more easy.

 

[labdog]

but peltiers are cheaper.


if you know you don't know, the way could be more easy.