Re:Peltier Application Note – Thermoelectric Cooling [pdf]
by dragontamer on Wednesday April 03, 2019 @11:29PM
(#19569096)
Oh yeah, definitely keep an eye on how big practical peltier modules are, so you get a basic gist of how to use these things: https://www.adafruit.com/product/1335
But while most people are talking about Peltier as a cooling module, note that it can be used as a more efficient heater. You can spend 36W of power (12V at 3A), and move maybe 10W. That's a total of 46W of Heat!
In essence: a Peltier is always going to be a more efficient heating device than a standard coil. Heating would be sufficient for tasks like Plant Seed germination or Bread Proofing... seeds / bread want to be around 90F or 32C, so you'd need to create a 110F / 43C source of heat.
Classically, people used light-bulbs to heat dough or seeds for germination, but a Peltier would be easier to control and more efficient.
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Refrigeration is cool (hah, punny), but precise heating also has a lot of good uses... even at the only ~20C or 36F differential where Peltiers are practical. Going +/- 20C or 36F is still a useful trick.
But while most people are talking about Peltier as a cooling module, note that it can be used as a more efficient heater. You can spend 36W of power (12V at 3A), and move maybe 10W. That's a total of 46W of Heat!
In essence: a Peltier is always going to be a more efficient heating device than a standard coil. Heating would be sufficient for tasks like Plant Seed germination or Bread Proofing... seeds / bread want to be around 90F or 32C, so you'd need to create a 110F / 43C source of heat.
Classically, people used light-bulbs to heat dough or seeds for germination, but a Peltier would be easier to control and more efficient.
-----------
Refrigeration is cool (hah, punny), but precise heating also has a lot of good uses... even at the only ~20C or 36F differential where Peltiers are practical. Going +/- 20C or 36F is still a useful trick.