Originally Posted by z7x
I purposely bought a 15V 27A power supply for my 15.4V peltiers thinking that it will be the most appropriate for the peltier. I am missing something here
Now I have:
2 x TEC1-12710
2 x TEC1-12712
1 x TEC1-12726
Do you think that the TEC1-12726 is powerful enough to cool water? (I'm building a water chiller).
Could you explain more about what you said about that 400W TEC running better at 12V? How do i know which TEC runs better at which V/A?
I need to get a decent Peltier (either 26311-5M31-17CW
) and a PSU for it and also matching water block for the cold side. Any suggestions? Or can I use my existing power supply 15V 27A?
For future reference please attach links instead of the peltier model number, it just makes pulling up all the info a lot easier.
As to the voltage thing I was talking about, you can run a peltier at any voltage between 0 and it's Umax. .A peltier moves heat as well as generates it's own. Generally higher voltage will mean more of it's own heat generated, though it isn't quite that black and white. Depending on voltage, the materials in the peltier, the size of the modules within the peltier block, and the current heatload on the peltier it will produce more or less of it's own heat to be cooled. The only control you have on those is the amount of heat on the peltier, and of course the voltage. The specific peltier I mentioned, the 400Qmax peltier runs at the highest efficiency at around 12 volts assuming you have around a 150watt heatload on it.
Ultrasonic2's TEC Calculator is a bit dated so it doesn't have all the modern TECs on it, but it's definitely a good reference to start looking at what kind of voltage and peltiers you want. Just pick the peltier closest to the one you're looking at on it. Usually you can get one extremely similar.
Both the peltier units you linked would work well. Play around with the TEC Calculator I linked to find out which one you want to use, and how much of them. Basically, take the heatload that's going to be used in your chiller loop, and divide it by the amount of units you are going to use. Then plug that value into the "heatload" part of the calculator, and plug a rough estimate of how cool you think you can keep the hotside of it. Then click calculate and play with the voltage, which is represented as the % toggle.
That resource should make figuring out what peltier/power supply to use much easier.Edited by ZytheEKS - 11/29/13 at 8:12pm