Believe what you want to believe.. Black Anodizing increases passive cooling.
Just a known fact..
Yes other colors help too.
If you can find ANY facts that state black anodizing "hurts" heat transfer under our conditions I'd be REALLY surprised....
Quote:
4.8. Black surfaces
Under natural convection conditions, the performance of a heatsink with a black surface will be 6% to 8% better than that with a plain or bright surface. However, this differential disappears under forced air conditions.
|
Yes, it's complicated but I stand by my general pricipals in regard to passive cooling..
http://robots.freehostia.com/Heatsinks/Heatsinks.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455404/
Quote:
|
To test the influence of thermal radiation on the total heat transfer in buoyancy-induced convection, an untreated and painted/anodized version of each heat sink was tested. Both painting and anodizing increase the emissivity of the heat sink and, consequently, the heat transfer by thermal radiation......Figure 8 compares the thermal performance of the untreated finned heat sink, the 22 mm-high in-house-made aluminum foam heat sink (reticulated22) and the 22 mm-high solid aluminum block to that of their painted/anodized counterparts. By painting or anodizing, the thermal performance improved for each of the tested heat sinks. The aluminum foam heat sink, the finned heat sink and the aluminum block, respectively, dissipated on average 17%, 31% and 44% more heat after they were painted or anodized.
|