kjuliussen

Hi. is there anyone here who has knowledge about peltier elements?

I've found a peltier wich is 30x30 mm in size and 3.9 mm in height. This draws 4 volt and 9 amps and 21.4 watts.
http://www.melcor.com/CP_Series/CP2-31-10L.PDF

Is this possible to use in the car along with servo and motor? is ther enough power?

sosidge

9A is a lot. Even if you have a very efficient way of stepping the voltage down from 7.2v to 4v you will still be pulling about 5-6A constant from the battery pack to power the peltier. This is approximately 20% extra load over the race distance, much more than could be gained back from the increased motor cooling.

No harm in building your own prototype though!

kjuliussen

Sow what i'm looking for is a peltier wich draws 7.2 volt and minimum amps then?

kjuliussen

Maybe this will work better?

http://www.melcor.com/CP_Series/CP0.8-71-06L.PDF
It draws 9.1 volts and 2.1 amps and is 18x18mm in size

tel

iTrader: (9)

Peltiers transfers heat at the cost of power. You still need a large heatsink to dissispate the heat from the motor and heat generated by the peltier element (7.2V X 2A = 14.4W in addition to the motor). The current draw of the peltier will reduce you battery voltage which will directly affect your car's punch and speed. You will also have to deal with the extra weight of a healthy heat sink. If the heat sink is insufficient the peltier device could destroy itself.

The better way to use a peltier is to use one to cool your motor to icy temperatures before the race. If your motor starts cooler it will finish cooler. Plus you won't have any drain on your battery or have additional weight in the car. Team Much More has a peltier based cooler to use on the motor before the race. At $100 price point you can build one using a peltier element, CPU heatsink/fan, and copper piping for much less. Good luck.