Hi
I'm have been looking into temperature control over atmosphere and water pool, within a 100 liter volume chamber, usually used for local adaption trials in intertidal species.
Now...usually the atmosphere is heated with ceramic lamps and cooled with fans, while the water is heated with aquarium AC resistive heaters and cooked with chillers (often together to achieve the goal temperature).
But.. What about peltier modules? These could allow a better resolution in temperature control. And with the proper gadjet structure it could heat and cool air (by controlling the current direction and amperes) while if it had a liquid heatsink with water flowing, it could heat/cool the water.
But peltiers have a relatively low heat pump and consume large amounts of current, but still, chillers are not exactly small, low power and precise for that matter.
So...has anyone tried peltier for air or water temperature control?
Can you share your bad or good results?
Thank you!
Cheers, Luis Pereira.
Yes we used Peltier module to maintain temperature at specific point.
If the cooling and heating load is high, I think Peltier is not good option. Peltier has very low COP, so if the load is high l then we need large number of modules. It will be very costly. Morever, the current is very high so it is not easy to control. We tried to use PID controller, but it is difficult to use electronic component that can handle high DC current. Another solution is using PWM to control temperature, some how it is better than PID.
In my opinion, using peltier can be good or bad depends on the cases. First, we need to consider the temperature range of our set point and how precision of our target. After that we can consider the cost.
Please feel free to discuss
Peltier elements are not energy efficient way to control temperature in case of large loads, as it was said already - especially when temperature difference between their surfaces approaches 40C. PWM with very high resolution is the best way for their accurate temperature control. You can get more info here: https://www.sscooling.com/
Our (TA Instruments) FOX Heat Flow Meter instruments use arrays of Peltier elements controlled using PWM (and Thermo Cube solid state chillers - only for small instruments). For our big instruments we use Freon-based chillers.
Thank you so much for your answers. It helped me decide.
Good work.
Cheers, Luís Pereira.
Both sides can be cold or hot, ir depends wjere you place the positive and negative voltage supply. Usually, the cold side is facing you when the positive supply is on your right.
ı know that but ı couldnt do this in ansys icepak:( how we do this any suggestions
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