Gary Emerson a écrit :
I'm going to change my thinking on this a bit and explain as well.

If you go to a thermal engineering book and lookup emissivity and
absorption then I think you will find the mirror/polished has the lowest
values which drove my original thinking.

On the sunny side with a mirror finnish you have a low absorption. The
problem with the rest of the equation is that you have low emissivity as
well, so what heat is absorbed is very poorly radiated. This low
radient level (low emissivity) causes the surface temperature of the
aluminum to be quite high.

Why don't you try a black paint ? It is well known that black has the
highest emissivity...

--
Denis

R. Parce que ça rompt le cours normal de la conversation !!!
Q. Pourquoi ne faut-il pas répondre au-dessus de la question ?