Over heating -- followup and question

[David Brady]

Pete,

The net heat power radiated is the difference between the power
absorbed and the power emitted and is proportional to the
difference in temperature between the surface temperature of
the radiator and the surrounding ambient air temp. This delta
is high for the engine radiator and low for the charge air cooler
or for the ac condenser. In other words some items are left
aluminum because if they were painted they could potentially absorb
more heat from the ambient air then they emit. The engine radiator
benefits from being black. Black cars' interiors heat up faster than
other colors, at night time, they cool down faster; i.e, they absorb
heat better and they emit heat better than white cars. It's physics.

David B
'02 LXi, Smokey
Va


Pete Masterson wrote:
>
> (Looking
> at 2 automobiles, 2 wall AC units in my house, and 3 AC units on the
> top of my 'bird, none of them have the aluminum condensers painted.
> There must be a reason that probably does not have anything to do
> with "black body emission.")
>
>



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