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TEC WB 4x1 vs 2x2 design

post #1 of 13
4/17/11 at 5:56pm
Thread Starter 
I plan on making two 4*50mm TEC chillers soon, and was wondering if there would be significant difference between the physical placement of TEC's.

The depth of the copper will be 10mm.

I would greatly appreciate any help.
Edited by xtremetechuk - 4/18/11 at 7:07am
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post #2 of 13
4/17/11 at 5:59pm
Do you have any particular size limitations or are those not known?
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post #3 of 13
4/17/11 at 6:04pm
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@Flak-Spammer

There are no specific requirements for either setup. I was just curious if there would be a significant difference in temperatures, or if one particular setup is superior in heat transfer.
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post #4 of 13
4/17/11 at 6:14pm
Presuming you can defeat laminar flow, and instead focus the block design on turbulent flow then neither the 4x1 or 2x2 designs should really matter. The only difference is that with 4x1 it's all too easy to design a laminar flow style block. Where with 2x2 it's not quite as easy. Otherwise there is no real distinction. Other than physically which is better from the size perspective.
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post #5 of 13
4/17/11 at 6:24pm
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@Flak-Spammer

+REP

Thanks,

Whats your opinion on the TEC "sandwich" design?
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post #6 of 13
4/17/11 at 6:42pm
Which sandwich design are you referring to?
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post #7 of 13
4/17/11 at 6:55pm
Thread Starter 
Sorry I should of elaborated,

I mean Elloquins 4*50mm design opposed to Ultrasonics quad design.

Sandwich Design -
Hotside WB<Th<Tc<Coldside WB>Tc>Th>Hotside WB.

Standard Design -
Coldside WB>Tc>Th>Hotside WB
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post #8 of 13
4/17/11 at 7:00pm
I guess that depends. It gives more cooling in a smaller space, but as to if that pays off versus the loss of surface area. That I can't truly answer. I can say though that the lost surface area will affect dissipation. That could be rectified by either increasing the surface area or increasing the velocity. I don't think either design is right or wrong it really depends on what you want. In most cases it's hard to build a block that dissipates heat effectively from both sides thus surface area and performance are often lost in order to compensate for space. As a simple start I would suggest a two block design. One cold and one hot.
Edited by flak-spammer - 4/18/11 at 5:35am
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post #9 of 13
4/18/11 at 5:22am
I'm going to go for a sandwich design personally, but I'm going to construct the top so it has fins that drop down into the other block.

How well / complex I make it will depend really on how effective my means of making it are, the biggest advantage of the sandwich is of course however, it has minimal exposed surface area requiring insulation.


As for laminar flow blocks... Surely all blocks will need to achieve turbulent flow realistically. If it's not turbulent flow, you will end up with very low heat transfer rates and possible stagnant zones in the blocks...
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post #10 of 13
4/18/11 at 6:27am
Thread Starter 
I would concentrate more on channels opposed to fins for the coldside WB. I personally don't think the pin matrix design will be effective for coldside WB.

Insulating on either setup will be relativity easy.

I'm currently working on a 3-pass channel design, similar to ultrasonics designs. I might use the same design for both Tc and Th waterblocks. How many TEC's will you be using, and which TEC's? Providing we're using similar setups, then we could do a comparison.
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