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TEC Calculations [HELP]

 Post subject: TEC Calculations [HELP]
PostPosted: Thu Apr 09, 2015 2:33 am 
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Joined: Wed Apr 08, 2015 10:29 am
Posts: 1
So apparently I suck at maths. Hoping someone can help me out.

What I want to know is if there is a way to calculate Qmax and DTmax (or Qc, DT) for an undervolted TEC from the information provided on the manufacturer's spec sheet.

For instance, if I were to take two of these TECs and connect them in a parallel circuit to one pair of pins on an 8-pin EPS for +12V @ 3.5A each, how would I calculate my Qmax and DTmax (or Qc, DT) at a given Th. Is that even possible?

Also, if anyone is super good at this maths stuff, can you explain to me why these did not work for me, or what I did to fuck them up:

I based these calculations:
Image
On this article.

I based these calculations:
Image
On this article.

Neither of these seemed to work. The first one has over 70% variance between the first and second method of calculating SM, RM, and KM. The second comes out to weird numbers for Qc, Vin, etc.

Ok thanks! :)


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 Post subject: Re: TEC Calculations [HELP]
PostPosted: Thu Apr 16, 2015 5:22 pm 
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Joined: Sat Nov 06, 2010 1:33 pm
Posts: 23
Location: Canada
When it comes to TECs it's best to assume that you can't find the numbers you are looking for. Use the provided graphs or purchase one and try and work out the various different values. I would take a guess that the reason is that this is the "secret" sauce of the various different manufacturers. So don't expect these values to be published for any commercial units.


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