To efficiently radiate heat, the radiator needs to appear "black" at the
wavelength of the radiation. For electronic devices, the wavelength of
radiation is well into the infrared region. It turns out that almost any
organic coating will work well. Paints are organic coatings. The color of
the paint really doesn't make much difference, though you do want to avoid
metalic paints.
Don Borowski
Schweitzer Engineering Labs
Pullman, Washington
"hansm" <[email protected]>@majordomo.ieee.org on 05/08/2003
07:31:24 PM
Please respond to "hansm" <[email protected]>
Sent by: [email protected]
To: "LEUNG YAT WAH DEREK" <[email protected]>, "EMC- PSTC"
<[email protected]>
cc:
Subject: Re: Heat Sink Colour.
Only in static or radiant mode. Otherwise surface finish has more effect in
forced or convection mode. But, in any event, black seems to be the the
most
radiant in black body radiation mode. There are more details than than but
this is just a thumbnail synopsis.
Hans Mellberg
Engineering Manager
BACL
230 Commercial Street
Sunnyvale CA 94085 USA
408-732-9162 x38
408-732-9164 fax
From: "LEUNG YAT WAH DEREK" <[email protected]>
To: "EMC- PSTC" <[email protected]>
Sent: Thursday, May 08, 2003 6:50 PM
Subject: Heat Sink Colour.
>
> Could anyone tell me about the heatsink is really in lighter colour can
release heat faster ( similar to we wearing lighter clothes in summer), but
why people always painted the heatsink in black or very dark colour, and
the
material of the coating on heatsink will affect their performance? Thanks.
>
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