LewTwo
1 MW
Here is a question I have never seen: which dissipates heat better a silver or black hub ?
Given most hubs are cast aluminum and or machined cast aluminum, one would assume that there is no surface treatment applied to silver hub. A black hub on the other hand is likely anodized. I believe that thin anodized layer is an insulator (both electrically and thermally). Black also absorbs radiant heat from the sun (something we have a lot of in southern Texas). They paint the tops of school buses here white to help reflect the sun's heat. On the other hand I have heard people claim that black heat sinks radiate heat better than those without any surface treatment.
Does anyone know the correct answer?
Given most hubs are cast aluminum and or machined cast aluminum, one would assume that there is no surface treatment applied to silver hub. A black hub on the other hand is likely anodized. I believe that thin anodized layer is an insulator (both electrically and thermally). Black also absorbs radiant heat from the sun (something we have a lot of in southern Texas). They paint the tops of school buses here white to help reflect the sun's heat. On the other hand I have heard people claim that black heat sinks radiate heat better than those without any surface treatment.
Does anyone know the correct answer?