Jerome Peters wrote: > Does anybody know about using the same Peltier junction for both > heating and cooling? I'm concerned about thermal/mechanical shock > when changing the polarity back-n-forth between hot and cold. Maybe > there needs to be a controlled ramp, if so then how do I figure out > the rate? >
Not an issue.. there controllers that basically run AC through the thing, changing the relative amplitude of positive and negative pulses. > Why: I'm in the process of building a small environmental chamber for > my home lab. The volume is ~30 liter, target temp range of 0C to 60C. > For the cooling side I am using water circulation (radiator, pump, > reservoir & water block) and Peltier junctions. At first I was > planning to have two separate systems, one for heating and one for > cooling, but then I got to thinking that using just the water and > Peltier could be used for both. I will be using a PID for temp > control, and two TEC1-12726 Peltier Qcmax(w)= ~240 △T =0j Yep.. use the same Peltier for both heating and cooling. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
