Foxrena's 4 TEC Water Chiller - Page 3

@Fox

Your quite right. In terms of power consumption; your results are very close US2's calculator. The 260W figure you say, would that be from the wall?

I'm quite astonished of how well the waterblock has performed, I wouldn't expect such a design to perform well! Regarding the temperatures. The CPU maxed out at 21C, with delta to water of 18.8C. So I'm right in saying water temperature was 2.2C? Or have I misinterpreted the results?

I don't have the time for TEC's anymore; well not with college and a-levels to study. Unless I find a decent CNC service; I have a lovely sheet of copper 10mm thick doing absolutely nothing! I should really send it to Crabid or Zipdogso, and be put to good use.

What you have to remember is TEC's are electronics, manufactured individually on the same line...not all TEC's are the same, even neighbours on the manufacturing line. Like CPU's and most other HQ components, TEC's are binned based on their size and resisitance, there is a fair bit of leeway in the set parameters. Customthermoelectrics are a reputable manufacturer and will have tighter binning and for extra charge will grade the TEC's sent to you. Whether this is neccessary or acceptable (from cost POV) is down to the purchaser.
Ebay TEC's are budget in the main they MIGHT be bin rejects or maybe just simply unbinned, that would explain why not all Ebay TEC's are carp.
That said I think the general consensus that you get what you pay for prevails.

Certainly when using multiple TEC's in a project it is pretty damn near impossible to get them all working the same, certainly it will be highly unlikely the resistances match unless you have requested, and paid for, matching units. So when using results from the whole project there will be a discrepancy.
It is worth noting here the importance of correct pressue on the TEC's, as you tighten the TEC's down you compress the material in the TEC's, this alters the resistance of the material. It is important to stay within the recommended torque to increase the chance of the TEC performing like the performance charts. With that one can probably see why it is considered good practice to get TEC's milled to the same depth when they under a common hotplate. But again performance gains are debatable and down to personal choice.

foxrena you have inspired me to start my tec project here is what i have so far.
Attachment 231812
I don't have mill or a bench drill. So i used a trim router and assorted hand tools.

i did the water channels with a dremel tool and a straight edge. i will start my own tread soon as its finished with more details as i don't want to hijack yours.