Using Peltier Plates for heating

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SUMMARY

This discussion centers on the use of TEC1-12712 Peltier plates for heating liquids, specifically aiming to achieve temperatures of 50-60 degrees Celsius. The user seeks advice on suitable liquids with low specific heat for efficient heating. The conversation highlights the advantages of traditional heating elements over Peltier plates, noting that while Peltier plates offer efficiency and dual functionality, they may not be the best choice for high-power heating applications.

PREREQUISITES
  • Understanding of Peltier plate specifications, particularly TEC1-12712
  • Knowledge of specific heat capacity and its implications for heating liquids
  • Familiarity with thermoelectric cooling and heating principles
  • Basic electrical knowledge, including low voltage applications
NEXT STEPS
  • Research the thermal efficiency of Peltier plates compared to traditional heating elements
  • Investigate liquids with low specific heat capacities suitable for heating applications
  • Explore the design and implementation of circuits for Peltier plate heating
  • Learn about safety considerations and best practices for using Peltier plates in heating applications
USEFUL FOR

This discussion is beneficial for hobbyists, engineers, and researchers interested in thermoelectric applications, particularly those exploring innovative heating solutions using Peltier plates.

juyoung518
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I know that peltier plates are for cooling(mostly :smile:) but I wish to try out heating other substances using peltier plates.
I'm planning to use 3 peltier plates (TEC1-12712) [maximum temperature difference of 70 degrees measured at 25 degrees / Maximum temperature difference of 80 degrees measured at 50 degrees / can stand up to 83 degrees celsius] to heat liquid(around 100ml) to around 50~60 degrees(the higher the better).
And yeah, unlimited electricity.

Could anyone suggest a liquid that has low specific heat for this project?
And is this project technically possible?

I've never used a peltier plate to heat something before.

Thanks in advance.
 
Last edited:
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I played around with a peltier plate a few years ago...had never seen one...disassembled the layers,etc...from a refrigerator...unit had one not working, the connections had come loose a common problem I found, and the other plate worked but did not seem to do much cooling...I don't remember the voltage, but I recall of a low voltage converter being used...

I believe yours a is a low voltage unit??

Id [specs] are here if you have not see them..looks like yours is 12 amps...
https://en.wikipedia.org/wiki/Thermoelectric_cooling#Uses

Table of specific heats is here...not a lot of variation for the few liquids shown.
https://en.wikipedia.org/wiki/Heat_capacity#Table_of_specific_heat_capacities
 
juyoung518 said:
unlimited electricity

If you have unlimited electricity why not use standard heating elements. They are cheaper, more reliable and durable and can be driven at much higher powers and temperatures. The only advantages of TECs are that they are a bit more efficient and they can be used to cool as well. If neither of these are requirements I would suggest using a regular heating element.

BoB
 

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