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Old 12 June 2012, 00:05   #1489
Mr B
Registered User
Join Date: Nov 2005
Location: Sweden
Posts: 734
A TEC isn't magic. You need to be able to transfer more heat away with the TEC in place, then you need without it. The advantage is that you can, if your capable to keep the TEC cool, reach lower then ambient temperature. If your not going to nitpic about details, you can guesstimate that the TEC adds another 50% heat that has to go somewhere. That is, if you select a TEC that can just chill your heatsource to ambient levels.
What sort of effectiveness you actually end up with depends on what current you feed it. Usually "we" power TEC's at 12v, but they are rated at 15v, going lower means they transfer less heat, but they are actually more effective. Meaning you get more for what you put in. Less then theoretical capacity, but more for every W used by the TEC to do the job.
(By "we", i added to groups together, aquarium owners and PC overclockers. I sort of belong to both.)

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