Quote:
Originally Posted by bloodhound31
Thanks Mark,
This is from the Jaycar site...translator please?
Temperature Differential (DT) (Th=27 degrees C) : >=68 degrees C
Optimum Input Voltage (Vmax) (Th=27 degrees C): 15V
Optimum Input Current (Imax) (Th=27 degrees C): 6A
Maximum Cooling Power (Qmax): 51.4W
I also have a wall adaptor (pic below)
I am already running three internal fans off the old computer power supply and three external fans...seems to run them ok.
When I hooked up one peltier to this adaptor on the 12V setting, one side got very hot real quick and the other side got real cold. Can you burn out peltiers?
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These are the ones I am thinking of (scroll down to Lab Power supplies).
http://www.dse.com.au/cgi-bin/dse.fi...ogs/CTG0000278
I am a bit worried that with the fans and 3 x 6A peltiers running flat out that you will end up with a smoking mess (your power box has a 20A max rating on it).
Thats what peltiers do. Current flows through the junction of two different metals, one side gets hot the other cold. You can melt anything if you give it enough juice and I suggest that you try to sort out a way to regulate the input power as they will suck as much power as you give them.
Also it was not possible to see behind your backplate from the pic. How much of the heat sink is exposed on the inside??? Are they flat or do they have the small ridge that would have originally just covered the CPU? Judging by the size of your peltiers you will need to remove all protrusions from the heat sink and make sure that the hot side of the peltier is in full contact with the inside of heat sink. Can you get the hot side outside of the tube? It would be self defeating if both were inside as one side would be cooling it down whilst the other side heated it up.
About the info you posted above.
The first one I think relates to the difference in temperature between the hot an cold side.
The second one simply tells you to run 15V for maximum cooling.
The third one states the optimum amperage to achieve maximum cooling.
The forth one is simply a measure of its cooling power.
I have vague memories of Th and Qmax from thermodynamics at uni but they are easily forgotten unless you use them frequently.
Good luck
