170W 15.5v TEC on 12v will put out xxxW ?

[The Byter]

Hi

How much heat (W) will a 170W 15.5 TEC on 12V put out ?

thank you !

[saaya]

should be around 140W of heat you have to remove from the tecs hot side. 140W as the heat it pumps from the cold to the hot side plus around 90W of heat it can pump... wich means 230W of heat overall... but im not sure...

[The Byter]

I want to use it as a load source for my phase change system...

when I'll operate it @ 12v how much W will it produce ?

I didn't understand your answer :\

[saaya]

a tec produces heat and it also pumps heat from its cold side to its hot side wich means you will have more heat on the hot side of the tec than just the heat it produces but also the heat it pumps from its cold side to its hot side.

my reply was confusing :D sorry

it will produce 140W of heat and pump 90W of heat wich means 140+90W=230W

but if you insulate the cold side of the tec it should not be able to pump any heat and will be only 150W or so.

i think you should rather used an resistor based artificial heat load, just use mosfets, ive built one like that before, you just need a few mosfets and a basic controller and some caps to keep the input stable, parts overall cost me 10$ i think :)

[The Byter]

I got the TEC and I tested it @ 11.6v, well it took 9.7A so the total is 113W~
-cold side isolated-

[froudeg]

Was that a thermal enterprises TEC by any chance?

Reason i ask, is i think they are quoting power consumption as their 'wattage' for peltiers, instead of their heat pumping capacity (Qmax). TEC's ratings always indicate the heat pumping capacity, and not the power consumption - it is a bit of a con to say a TEC is 170 watts, when it can only shift 130 watts of heat.

From my experience, a 15 volt TEC, when run at 12 volts tends to consume about the same electrical power in watts as its Qmax (heat pumping capacity) rating.....which is why i think you have a Thermal Enterprises TEC, quoted as 170 watts - but as they sorta indicate, its 130 watts heat pumping capacity (they say its a 130/170 watt peltier in description)......since you are pulling about 120 watts of power at 12 volts, it does lead me to believe that is actually a 130 watt Qmax TEC....and at 12 volts your heat pumping capacity is more like 80-90 watts.

[froudeg]

Btw - peltiers don't make accurate heat loads, well not without feedback circuitry nd PWM modulation.

A peltiers power consumption changes with cold and hot side temperatures.

Its far better (and cheaper) to make a load by thermal epoxying in a large wirewound resistor to a copper plate.

[The Byter]

My heat load is the power consumption of the TEC or is it the Qmax ?