overclocker333

What would make a better water chiller given the same qMax ability of the tec's... more of the lower rated tec's to create a large surface area... or a lesser number of higher rated tec's creating a smaller surface area?

Not sure if that is very clear... the combined qMax of the two different tec combinations would be the same. One of the combinations would have a larger surface area than the other. Both combinations would use the same amount of current.


Or to put it another way... If you have a fixed amount of current to work with would it make any difference if you use the current to make a water chiller with a large surface area or a smaller surface area?

Sorry... I am not asking this very well.

Bottom line... I would like to know the best combination of tecs to make a water chiller that will be powered by 70-90 amps.

Thanks in advance

flak-spammer

For a chiller you'd want a mix between surface area and Qmax. Don't pick really weak TEC's but at the same time don't pick the bloody strongest you can find. 226w Qmax should do fine for a chiller 4-6 of them undervolted could provide an intense amount of chiller power and a rediculous amount of surface area (on the block/coldplate).

Ultrasonic2 (muffy)

lots of low powered TEC for the same Q for sure

if you double the surface area for the same Q then your 1/2ing the hot and cold side C/W's Meaning you'll get much better load temps.

i plan on ditching the 226's and going for 125 ish for this reason ..

It's simple maths more low powered TEC are better if the surface area is great

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overclocker333

Thanks.... I'm going to use 12 12706 15volt/6amp modules undervolted to 12 volts to start (I have 9 of them already) but I am thinking about the 12710 as well.

How do you think that will work? (Don't mention the power bill please... lol. do you think 4 Meanwell S-320's will do?

I'm already committed on the waterblocks... the machine shop allready has the copper ordered (1-3/4" x 1") So... I have to use 40mm tecs on this project. Maybe 50 mm on the next one. What do you think of the 62mm?

overclocker333

What tec supplier are you using?

Ultrasonic2 (muffy)

12706 (61QMax) a bit more Q would help .. not that you've told us what your trying to cool

in the second i looked for i couldn't find any reliable info on the 12710

your PSU's will be fine im using 2 320's to power my rig they are so cheap. The only mistake i made was to get the 24volt ones . i should have gotten the 48volt ones for better efficiency

I'm running the 4x 226 TEC's at 10 volts which uses 450 watts all up after some stabilising time

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overclocker333

Noob here.

Why 48 volt... I would think 12 volt. How are your tecs wired... in series? I have a lot to learn... I have one 46 amp server psu 2 41 amp psu's and a Meanwell S-240-12 at the moment.

What are these... Meanwell rip offs made in China? They have the red logo in the same spot.
http://stores.shop.ebay.com/Asia-Eng...34Q2ec0Q2em322

Ultrasonic2 (muffy)

i currently have 2 series pairs at 20v so each TEC gets 10 volts

If had one powerful 40volt PSU with the 4 TEC's in series they would get 10 volts each.

I here you asking what's the point ? the point is for the same wattage the 40volt system will draw 1/2 the current .. the more current a system runs the more losses you'll have to resistance .which turns into heat.

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zipdogso

I appreciate what you are doing here trying to use the old eliminator TEC's etc.

BUT believe me...if it comes to buying TEC's you would do far better to buy a smaller number of large TEC's and undervolt them by a greater amount.
using a 15.6v TEc at 12v IS highly inefficient.
Using 30v TEC's (26316HT from heibei IT) at 7-8 volts would be far, far better and have a pump of getting on for (depends on your setup.) 100w EACH (at 7-8 volts.) at a COP of between 1-1.5 not bad for a cheap 50mm x 50mm unit. The total current draw of 4 of these would be well under 10amps.

The more current you have to provide the dearer the power supply.

What you propose will work but at hugh and totally unnecessary expense....4 meanwells...jeez not to mention the excessive power use of the TEC's.
You have been blinkered by the idea of using the old eliminator TEC's...STOP and think here....think out of the box.

Ultrasonic2 (muffy)

Thats all ture just keep in mind overclocker333 that as you under volt tec's more then you'll also loose more of the delta

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