# Simulation CFD

#### TEC Peltier weird temperature distribution

75 Views, 4 Replies
12/21/2017 7:38 PM

So I am working on a thermal transfer study with TEC's. I am having a strange issue where the temperature distribution on the TEC device itself appears backwards from what I expect. For example the hot side of the peltier is showing cold and the cold side is showing hot.... But the surroundings and items I have touching the Peltier are showing the temperatures I would expect... it is a really strange thing. When I investigate the TEC with the parts menu in the results tab I get the below results which indicates that the surfaces are as I expect, but graphically they do not appear that way. Attached is a screen shot. Anybody seen this before?

Thanks,

Grant

*** Analysis: Steady State Heating ***

1 TQL-001:1:

Part id: 1 step number:47: 0

Part type: TEC part

TEC Device number: 0 None

TEC Device Material: 2 None

TEC Device Number of Couples: 16 None

TEC Device Control Type: 4 None

TEC Device Control Value: 0.5 None

TEC Device Cold Side Temp: 37.3071 Celsius

TEC Device Cold Side Q: 0.103044 W

TEC Device Hot Side Temp: 80.244 Celsius

TEC Device Hot Side Q: 0.603044 W

TEC Device Peltier Q: 0.204794 W

TEC Device Power: 0.5 W

TEC Device Conductivity: 1.37281 W/cm-K

TEC Device Current: 0.67071 A

TEC Device COP: 0.206087 None

TEC Device FOM: 0.00240608 None

Report Inappropriate Content
Message 1 of 4 ( Views: 75 )

#### Re: TEC Peltier weird temperature distribution

12/26/2017 7:48 PM

Hi Grant,

The TEC is what we call a black box material.  Meaning that the math inside of it does not follow normal convention and the results through the thickness are meaningless.  Basically they use a special math to create the process in which they function and the results tools in the results environment do not read it properly.  If the top and bottom surface temperatures are correct, and the results look like it is functioning as it should, then the results through the thickness can be ignored.

Thanks,

James

James Kubli

Report Inappropriate Content
Message 2 of 4 ( Views: 59 )

#### Re: TEC Peltier weird temperature distribution

01/02/2018 11:10 PM

I just wanted to follow up and see if I answered your question.  Please let me know if there is anything I can assist with.

James Kubli

Report Inappropriate Content
Message 3 of 4 ( Views: 46 )

#### Re: TEC Peltier weird temperature distribution

01/03/2018 3:26 PM

James,

Thanks for the explanation. That makes sense now. It just looked very strange without knowing the complete underlying process. Sorry for the late reply I was out of the office last week.

Thanks again!

Grant Chapman

Report Inappropriate Content
Message 4 of 4 ( Views: 36 )