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TEC for res cooling? - Page 2

post #11 of 20
http://en.wikipedia.org/wiki/Peltier...Peltier_effect


http://en.wikipedia.org/wiki/Thermoelectric_cooling

A bit complicated, but they has diagrams!
post #12 of 20
Thread Starter 
That's the problem for standard fridges, because of the whole burned out compressor thing, but I didn't think TEC's had the same vulnerability.

I know it would have to be able to remove more heat from the system than the CPU and video card put in to cool it below ambient, but I was hoping that a TEC like that would be a little more powerful than the rest of you think it is. I was really just thinking of it as a cheap way to suck a few more watts out of the system, but if the temps run that high, it won't make much of a difference.

For my own curiosity (and I know it's outside of the watercooling section), how much water, in liters, do you typically fill a loop with a CPU, video card, and reservoir with?
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post #13 of 20
Quote:
Originally Posted by TnB= Gir View Post
ok, thanks but is it worth to do this with my wc setup? will my temps drop down much? and how much cash is needed for something like this? Sorry for all the questions
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post #14 of 20
Quote:
Originally Posted by MrDeodorant View Post
That's the problem for standard fridges, because of the whole burned out compressor thing, but I didn't think TEC's had the same vulnerability.

I know it would have to be able to remove more heat from the system than the CPU and video card put in to cool it below ambient, but I was hoping that a TEC like that would be a little more powerful than the rest of you think it is. I was really just thinking of it as a cheap way to suck a few more watts out of the system, but if the temps run that high, it won't make much of a difference.
Correct... you need a much bigger TEC and the TEC would need its own dedicated cooling.


Quote:
Originally Posted by MrDeodorant View Post
For my own curiosity (and I know it's outside of the watercooling section), how much water, in liters, do you typically fill a loop with a CPU, video card, and reservoir with?
It varies.... I would say about 0.5L to 1.5L is average.
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post #15 of 20
Quote:
Originally Posted by go4life View Post
ok, thanks but is it worth to do this with my wc setup? will my temps drop down much? and how much cash is needed for something like this? Sorry for all the questions
No it isn't worth it for reservoir cooling. Now if you get a TEC block and use the TEC on the CPU itself, that will lower temps a lot more than TEC'ing the res. But you're talking about $100 for the PSU (last I checked, not positive now.), for the TEC, you're only looking at about 10-30 bucks. For the TEC waterblock, you're going to need to buy a block made for TEC use. Those are usually around 200 bucks. Not to mention the increase in electricity from running a 400w TEC.

IMO, it's not worth it, but it can be a fun experiment. I tried a waterchiller made from a window AC this summer and it was a lot of fun. I ended up breaking one of the cap tubes on accident though, so I never got to finish.
post #16 of 20
Quote:
Originally Posted by DuckieHo View Post
It varies.... I would say about 0.5L to 1.5L is average.
yeah I used 1.3L I think.
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post #17 of 20
Quote:
Originally Posted by TnB= Gir View Post
No it isn't worth it for reservoir cooling. Now if you get a TEC block and use the TEC on the CPU itself, that will lower temps a lot more than TEC'ing the res. But you're talking about $100 for the PSU (last I checked, not positive now.), for the TEC, you're only looking at about 10-30 bucks. For the TEC waterblock, you're going to need to buy a block made for TEC use. Those are usually around 200 bucks. Not to mention the increase in electricity from running a 400w TEC.

IMO, it's not worth it, but it can be a fun experiment. I tried a waterchiller made from a window AC this summer and it was a lot of fun. I ended up breaking one of the cap tubes on accident though, so I never got to finish.
Ok, maybe I will try something like that in some years I dont got that much money now sadly well thanks for the help Gir! rep++
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post #18 of 20
Thread Starter 
Yeah, the TEC needs dedicated cooling, which was the idea with the fan and the shroud, remember? I know it isn't a magic cold box.

I'm honestly thinking about trying this just for the hell of it. Even with a heat inflow of perhaps 400 watts (CPU, VGA, plus whatever the pump inputs), an extra 40 watts of outflow is nothing to shrug at, even if inefficiencies in how the TEC is attached to the reservoir and how it's cooled drop the cooling to, say, 30 watts. It depends on whether or not I can find this fridge again for $30. If I can find it, I'll chop it up and post the before and after temps, FOR SCIENCE!
Edited by MrDeodorant - 11/12/08 at 8:16am
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post #19 of 20
Quote:
Originally Posted by MrDeodorant View Post
Yeah, the TEC needs dedicated cooling, which was the idea with the fan and the shroud, remember? I know it isn't a magic cold box.

I'm honestly thinking about trying this just for the hell of it. Even with a heat inflow of perhaps 400 watts (CPU, VGA, plus whatever the pump inputs), an extra 40 watts of outflow is nothing to shrug at, even if inefficiencies in how the TEC is attached to the reservoir and how it's cooled drop the cooling to, say, 30 watts. It depends on whether or not I can find this fridge again for $30. If I can find it, I'll chop it up and post the before and after temps, FOR SCIENCE!
I've done it with a 80w TEC.... I believe my temps dropped only 2-3C.
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post #20 of 20
Thread Starter 
Was that your water temperature, or your chip temps? Also, I was convinced to use the Thermochill PA160 radiator, so I'm sort of nervous about it, because nobody else ever seems to have one. I'm afraid that it won't be enough cooling, in which case an extra 30 watts might come in handy.
Edited by MrDeodorant - 11/12/08 at 8:21am
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