TEC build log start

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toolmaker_03

toolmaker_03

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Mar 26, 2012
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http://imgur.com/cd15M1a
ok so I have finished all my testing and decided on a general build for this unit.
this build will be sealed inside of a chest so I will not have physical access to the computer case, I would like some input on the general idea that I am presenting, I use antifreeze so freezing the coolant is not a issue, and seeing as I am increasing the cooling capacity of my water cooling system, I have also chosen new clocks for my hardware, the CPU clock will run at 5Ghz, and the GPU's will be running at 930Mhz, I have already tested theses clocks and found them to be stable for my hardware.
 
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If you had used power relays that were over rated for the load you could have skipped that entire cooling setup you created.

My peltier that is on a relay pulls 20A and it is on a 30A relay and it barely gets warm to the touch if I had put it on a 40A relay it would not even get warm so there is no need to air cool even my 30A relay.

Now if your relays are close to the actual amperage load of the peltier to the point you need to air cool them then even with air cooling you are still going to prematurely burn out the contacts in the relay.

You could have simply saved yourself all that invested time by using over load rated relays.

 
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I'm sorry, you totally lost me with the clay at the transition area?

 
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I am packing clay around the cold side of the TEC assembly the clay will stop at the TEC's so there is a good chance that the clay right around the TEC's will get cold and cause condensation.
gcxsCCf.png
 
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it should be somewhere between -10C and 10C so I am guessing that I will be at 0C.
best case would be at -25C but I know I will loose some of that coldness in the process of cooling the water, and the components warm the water by a few degrees.
the question is how much coolness will I loose? the test build held steady at 0C, with one TEC. this setup has 3 TEC's, but it also has both the GPU's in the loop, so we will see how cold this setup can hold the water.
 
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So you will be cooling the CPU and GPUs as well?

So you'll have to discover the temperature parameters after you get it running then.

I've accidentally had mine down to 4c and at that coolant temperature condensation was actually droplets, I caught it just before I had a major disaster, now with my relay that is not a problem anymore.

What wattage and amperage are your peltiers?
 
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the green is supposed to be earth ground, and I have black wire for negative, but I messed up and made the wire coming from the relay a green wire and it should have been a black wire, my bad, I might switch them for black wire later.

so I am supposed to have two reds, two blacks, and one green wire going to each power supply.
the switch is the only thing that needed the earth ground.

it is 10AWG wire I already had it and it wont hurt the system to have a little heaver gage wire on it.
I could have used 12AWG wire it would have been fine.

I have decided to build frames for the three TEC power supplies, and stack them on top of each other. after I finish the frames for the radiators, I will start on building the frames for stacking the TEC power supplies.
 
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gcxsCCf.png

some changes I may make on the cold side of the loop, I am considering removing the 250mm reservoir from the cold side of the loop, I have 3 DYI reservoirs in the ice chest, and it is difficult to insulate the 250mm reservoir on the outside of the chest, so that is why I am considering removing it altogether.
 
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ok so I found a plastic bowl that fits the bottom of the TEC assembly great, I will use this to capture any condensation that may form in the area. I might even find a small heater type of device that can aid in the evaporation of the condensation that collects in the bowl, or I will just use a paper towel to dry it out every once and awhile.
 
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Are you sure you need 2 more rads?

Have you tested to see what 4 can handle?

I'm just saying this is different than any kind of DeltaT calculating when it comes to cooling peltiers, so what calculating has led you to 6 being needed to get the job done?

Just sharing my experience not suggesting OK: When I tested water cooling the hot side I used a 240 Black Ice GTX and it was overloaded with a single 200W/20A peltier (Actual measured draw), and the radiator got so hot I could not hold my hand on it.

I had estimated at the time it would have at least taken a quad 120 for the 1 peltier, but a triple 120 may have done it?

When I discovered the hot side could be air cooled and was going to be a much cheaper solution I went that route and abandoned the water cooling of the hot side, but I've always been curious as to what would have properly done the job?

You can get many suggestions as to what will do the job but until you actually put it into use you will not know for sure, and your peltiers are more powerful than mine, so maybe you do need 6?

The other problems I encountered was the tubing I was running was really not sufficient either as it got super soft from the heat, and I had a pump fail from the heat as well, but it was a XSPC 750 pump that was sealed inside the reservoir that could not handle the heat.

I don't think a D5 is going to have that problem, seeing as how the motor housing is separate from the impeller, but keep in mind that a D5 is not designed for that kind of heat to be constantly run through it, as even the hottest CPU on the planet can not touch the constant raw temperatures the peltier produces.
 
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That sounds 100% logical!

I edited the post above with more info, check that please?

 
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so yea, with one 360mm rad I was hitting 55C on my water temps, and with two 360mm rads it would hold at 40C on the water temps, but I am happy with it at 40C or less.
but no, I do not know how 4 X 360mm rads would handle 3 X TEC's.

so it seemed like one TEC with two rads was heating the system the same as all my components did in a serial configuration, it had about a 10C delta T.
 
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tubing I am using the norprene 3/8ID 5/8OD tubing, and it is rated at 125C max, even at 55C it still has a good feel to it, its not real soft or collapsing.
the pumps say that they are good to 65C, but I really do not want to test that. :lol:

as for the 480mm rad, yea, I could see that being enough, so 3 X 480mm rads could be enough for this kind of build.
 
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So what tubing are you going to run?

Make sure it is temperature capable.

I see you have quite the interest in your project at OCN, and that is good!

I wish I had gotten better response when I posted my cooling there, but all I seemed to get from them was why my cooling wasn't going to work!

Which was constantly baffling to me since my cooling was working and had been in operation for over a year when I posted there?

And now it is over 3 years in operation and some of them have actually copied some of my work, like the home made reservoir, why copy it, if it doesn't work! ROFL :lol:

I associated some of them as just brain closed idiots, I mean, What About Over A Year in Operation Do Some of You Not Understand!

Anyway, that's neither here nor there, just be careful over there, some of them think they hung the moon! :)
 
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