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Originally Posted by levi
In the field of audio power amplifiers, heat is dissipated by the use of huge aluminum heat sinks.
1. Does powder coating alumninum decreases the heat transfer rate when compared to bare aluminum?
2. What about anodizing. Does this also decrease the heat transfer rate when compared to bare aluminum?
The difference in heat transfer rates may be insignificant to be of any concern but I am curious.
Thanks
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Yes the Powder Coat does act like an insulator to what degree depends on how thick of a coat is applied. Does it effect how it cools. Yes. Not sure of the rate.
When I Powder Coat lets say a Complete Engine, the temp on the engine will raise about 10 degrees over normal. So what I do drop the T-Stat by 10 degrees to help off set.
How do I come to the above figure? Well run 2 engines of the same size and make and same cond. The PC 1 will heat faster ( Normally staying about 10 degrees ahead of the uncoated one) then the un-coated engine and will run about 10 degrees higher +/- a few degrees.
Not sure of teh Temp rise or ins factor for the heat sink. Also have no answer for the anodizing.. But I'm sure it does as your covering teh bare metals..
Jim S...