Do I have to have a pelt power supply for a

[alexkerhead]

Do I have to have a peltier power supply for a 80W ICE-71?
could I use a secondary ATX PSU or put it on my pre existing PSU?

[Staz]

Not exactly sure what you are asking here.

Is it an 80w pelt and you want to know how to power it?

If so you have to remember that most TEC's are rated not by how much power they draw but by how much power they can pump. A typical 80w TEC will draw about 120w of power. However most TECs are not 12v, ussually somewhere around 15v or 16v.

Assume it is a 15v TEC that draws 8amps to pump 80w. Run it at 12v and it will still pull 8A for 96w needed to power it, and it will cool around 64w of heat.

If you have a high wattage PSU you could get away with useing it, or you could use the black and green wire jumper trick to use another PSU or you could get a dedicated PSU.

Basically you need to find out more about the power requirements of that TEC.

[alexkerhead]

thanks staz, you answered my question, I am getting a cheap pelt to add onto my cheap water cooler..both will be run by a seperate 300watt antec PSU..

[Staz]

I hope that you are planning on useing that 80w pelt on the video card because it won't help much on the CPU.

[alexkerhead]

Originally Posted by Staz

I hope that you are planning on useing that 80w pelt on the video card because it won't help much on the CPU.

Why not?

[Staz]

Becuase a TEC that is rated to pump 80w should pump 80w at it's rated voltage. So if your CPU is putting out 80xs of heat and you TEC pumps 80w the the net is 0, or =. Which ever way you want to look at it. Basically if your CPU puts out 80w and your TEC pumps out 80w then you would see no improvement in temps as the TEC would be doing all it could just to keep up. If you are running your TEC at 12v and it can onlt pump 64w and your CPU puts out 80watts you TEC will over heat and your CPU will either burn up with it or shut down on a temp overload.

That is why 226w TECs are the call for the day, but an 80w TEC is the perfect size for a graphics card core.

[alexkerhead]

thanks staz, I will get a 226w for cpu and a 80watt for my gpu..
I will need an extra 450watt or better now..lol

[Staz]

If you have the cash I know someone who would responde to a wanted add in the wanted section of the classifieds here. Wink Wink nudge nudge. That would be for a 15v dedicated PSU and a TEC

[alexkerhead]

I am sooo poor staz, I hate to say it, but if I get some cash, I will post a wanted add, but the only way I am getting the single pelt and a cheapo w/c'er, is I am trading a P4 3.06GHz for it..
Would a dedicated 16v $35 radio shack power supply work?

[Staz]

for an 80w or the 226w TEC? Either way it depends on the output rating of the PSU. Check for the amps on the output ad see if they are higher than the rating on the TEC.

[alexkerhead]

Originally Posted by Staz

for an 80w or the 226w TEC? Either way it depends on the output rating of the PSU. Check for the amps on the output ad see if they are higher than the rating on the TEC.

I cant find the 16v I was looking at in the store, but this is close..
http://www.radioshack.com/product.as...ct%5Fid=22-506
Smae amps
120W DRIFT 1.15 Potted!! would work with it...7.9amps

[Aedan]

The DRIFT 1.15 peltier requires a 24.6V source. If you run it at 12V, you can expect to get the best part of 59W of heat pumping.

If you're going to run two peltiers in your case, then you definately need good watercooling. Peltiers generate their own heat in addition to the heat they pump. You can work out the total heat generated from total heat=heat pumped+peltier heat. The heat pumped term is the amount of heat the peltier can pump; for a 120W peltier, it'd be 120W. The peltier heat can be worked out by multiplying the current and voltage used by the peltier together.

As an example for the 120W DRIFT 1.15 peltier:
peltier heat = 7.9 * 24.6 = 194.34W
heat pumped = 120W
total heat = 194.34+120 = 314.34W

Do the same for the 226W peltier, and you get a figure that's about 592W of heat. Combine the two together and the cooling system has to handle about 906W of heat. That's a huge load of heat to get rid of.

If you're running aircooling, imagine the effect of sticking a 1KW electric heater inside your case. That's pretty much the effect of running a 120W and a 226W peltier.

[alexkerhead]

So, are you saying to wait until I can get the asetek before I get the pelts?

[Staz]

A bit of better advice. If you want a TEC to play with and experiment with, just some hobby tweaking to see what you can do with it that is cool. If you want one for a daily machine then I hope you aren't paying the electric bill. If you live somewhere like a dorm where electric is included go for it. If you or your parents pay the electric bill the true cost of a pelt will come from there.

[Aedan]

Well, taking the heat output from some 150W up to some 900W is going to require significantly better cooling. You are not going to be able to handle that power on air, and some water cooling systems will struggle with that loading too.

[alexkerhead]

Originally Posted by Áedán

Well, taking the heat output from some 150W up to some 900W is going to require significantly better cooling. You are not going to be able to handle that power on air, and some water cooling systems will struggle with that loading too.

http://www.kingwin.com/pdut_detail.asp?CateID=31&ID=187
That is my first cooler I am ordering today..
x/mas comes a asetek system.

[Aedan]

My immediate guess would be that if you were running a 226W peltier together with a 120W peltier the kingwin system would not be able to cope. Depending on how badly it coped, you might end up with the coolant boiling off.

Asetek's Black Ice Extreme 120mm radiator is the only one of asetek's radiators that would be capable of the feat, but you're right up against it's maximum heat dissipation. According to asetek it can handle 919Wh of heat. The system you are proposing would kick out 906Wh of heat, and with the radiator at it's maximum, you'd probably find the coolant was unacceptably hot to get the most out of the peltiers.

[alexkerhead]

Originally Posted by Áedán

My immediate guess would be that if you were running a 226W peltier together with a 120W peltier the kingwin system would not be able to cope. Depending on how badly it coped, you might end up with the coolant boiling off.

Asetek's Black Ice Extreme 120mm radiator is the only one of asetek's radiators that would be capable of the feat, but you're right up against it's maximum heat dissipation. According to asetek it can handle 919Wh of heat. The system you are proposing would kick out 906Wh of heat, and with the radiator at it's maximum, you'd probably find the coolant was unacceptably hot to get the most out of the peltiers.

CouLd I do a 120watt for the CPU only then?

[Gizmo]

Something else to be aware of: with a pelt the temp is inversely proportional to the amount of power being handled.

For example:

Your 120W Pelt might be able to get down to 50C below ambient. Assuming ambient of 30C, then your pelt could cool to about -20C - AT ZERO LOAD.

Increase the load to, say, 60 W, and now that pelt can only drop the temp by 25C or so.

Increase the load to 90W, and now you are looking at about a 10C drop. And to achieve this 10C drop in temperature, you are dissipating 200W of heat (because of the power to run the pelt).

In other words, to get a useful result, the pelt needs to be able to handle AT LEAST twice the power you plan on puting to it.

You stick a 120W pelt on your CPU, and I expect you will be very dissappointed.

[Razorfish]

Originally Posted by Áedán

you might end up with the coolant boiling off..

Ive seen that happening, basically a kettle for a computer!