Using Peltier Plates for heating

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Discussion Overview

The discussion revolves around the use of Peltier plates for heating liquids, exploring the feasibility of this application, and seeking suggestions for suitable liquids with low specific heat. Participants share their experiences and considerations regarding the project.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses interest in using three Peltier plates (TEC1-12712) to heat approximately 100ml of liquid to around 50-60 degrees Celsius, asking for suggestions on suitable liquids with low specific heat.
  • Another participant shares past experiences with Peltier plates, mentioning issues with voltage and cooling effectiveness, and provides links to specifications and tables of specific heats.
  • A participant questions the rationale behind choosing a liquid with low specific heat, suggesting that it would allow for quicker temperature increases.
  • Some participants discuss the advantages of using standard heating elements instead of Peltier plates, citing cost, reliability, and higher power capabilities, while acknowledging that Peltier plates have efficiency and dual cooling/heating benefits.

Areas of Agreement / Disagreement

Participants express differing views on the suitability of Peltier plates for heating applications versus traditional heating elements. There is no consensus on the best approach or the necessity of using low specific heat liquids.

Contextual Notes

Participants mention various factors such as the cost, toxicity, and flammability of liquids, as well as the technical specifications of Peltier plates, but do not resolve the implications of these factors for the project.

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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