View Full Version : help with tec formula

09-09-2003, 03:50 PM
how do i know how much watts my tecs are actually moving? is there a way to calculate it by meassuring the resitance, heat or heat difference?

thx! :)

09-10-2003, 02:07 AM
Post it in the TECs section and you'll get a response d00d...

09-10-2003, 05:01 AM
/me waves i know the answer

But this is in the wrong forum ;)

In all seriousness though it depends on lots and lots of factors, the predominant one is what tec is it? And how many volts and amps?


09-10-2003, 05:51 AM
ill use an ampheremeter in school :)

09-10-2003, 07:13 AM

There, I just wrote up an article to answer the question :D.

09-10-2003, 07:44 AM
lol thx :D

doesnt help me though since i dont know what kind of tecs i have... i think they are 28W tecs rated to run with 8.5v ...but im not sure...

so whats better? run the pelt wt the highest volts possible or only 60% of it and let it drain more Amps?

09-10-2003, 08:05 AM
eh? it will draw whatever current it wants to at the volts you set it, unless your limiting the current at the power supply.

But in answer to your question if its 28w @ 8.5v it will take 3.3amps, but without knowing vmax or imax your going to be fairly stuck tbh. And you dont want to run at vmax.


09-10-2003, 06:35 PM
yeah thats thr prob... cool thx, so lower volts and higher amps is better? thx! goos to know... i was going to run them off the 5v line, should be fine then since it has a lot of amps :banana:

ill get an ampheremeter from school and meassure my psu rails and the tecs powered with 5v.

09-10-2003, 11:56 PM
If vmax is 8.5v the 5v will be around the sweetspot between dT, Heat pumped and efficency, so itll be all good.

Where are you going to put these tecs though btw? On memory i hope, itll wont work anywhere else.


09-15-2003, 05:20 AM
This (http://www.melcor.com/handbook.htm)
link hopefuly contains all the answers to your questions.
Enjoy m8:)

09-15-2003, 06:14 AM
im building a 400W waterchiller ;)

thx for the link, i dont know for sure if the vmax is really 8.5v, i bought the tecs 2 years ago... dont really remember it.

ill take one to school tomorrow with a psu and a physics professor will let me in the instruments room where i can play with their ampheremeters :D

09-15-2003, 08:29 AM
Ammeters, f00.

09-15-2003, 11:07 AM

09-15-2003, 04:37 PM
ampheremeter = a nonexistent word you invented.

The unit is an Ampere, and the device to measure it is an ammeter.