Quote:
Originally Posted by bojan
- shiny surface versus black: which one radiates more ? (i said black..)
- rough surface versus smooth: which one looses heat faster by convection? (i say smooth)
- big fins versus fine? (i say big, )
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Its not that simple...
There are design methods and calculations you can do design fins. The fin has to be thick enough to carry the amount of heat you need it to, long enough to get rid of the heat to the air but not long enough it stops the air getting away, etc. Fin orientation is important too, as well as natural or forced convection.
Its a bit like which is the best spoon: a tea spoon or a soup ladle? It depends on the circumstances.
Al.