Quote Originally Posted by NaeKuh View Post
There 90W TEC's if my memory serves me. And theres 5 of them.

The block is uber free flowing. Placed right along with DD MPC Universal.

Nol is doing all the testing needed. :T Thats why he has it. After he figures out the best way to use it, thats how i will adopt it.
Well I stand corrected on getting more heat transfer than heat in. I took a small foam cooler case and mounted the TEC (a 12730) between 2 melcor sinks in the top so that the cold side sink was in the water almost to the TEC, and the hot side was in air. I used a 110CFM fan on the hot side, giving me .06C/W thermal resistance. With 1 gallon of water initially at 25C and room ambient at 25C, I applied 5.1V from a 500W Ultra supply. Current draw settled at 5.8A after a few minutes. That represents 29.6 watts in.

After 15 minutes, the hot side measured inside the sink by the TEC was 30.1C, and the water was at 22.7C. So pulling 2.3C out of a gallon of water in 15 minutes, with a differential of about 7 degrees. That represents about 40W transfer. The total hot side load of about 70W squares with the 5.1 rise pretty well, so I believe the numbers.

That is a single 62mm TEC, and with a different mounting arrangement I could probably get 4 of them under that Melcor sink, but the hot side would get a lot hotter with a 280W load. The TEC would be more efficient at the higher temp but also working across a bigger differential.

Just to see where it would go, I put 12.2V across the TEC and ran the same test. Current stabilized at 22A for a total heat in of about 270W. After 10 minutes, the hot side was at 50C, and the cold side just under 20C, representing about 130W transfer across a 30C differential.

That leads me to believe that 4 of these, run at 5V, would cool a 1GPM flow by .5C and require 120W to do it. That is clearly in the same league as phase change cooling for efficiency.

I'd like to try the same thing with WC on the hot side to see what it would do with a lower differential - my guess is it would move over 50W but use more current, so it might not be as efficient.