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On 2014-05-16 09:30, John Johnson wrote:
<blockquote cite="mid:537612E1.2000506@golden.net" type="cite"><big>These
mechanisms include traditional heat-sinks which radiate heat into
air passing over fins to cool components mounted to the hear sink.</big></blockquote>
<br>
My bad. I am mixing "radiation" of heat with "conduction" of heat. And
it shows that I am not an expert in this area. <br>
<br>
I would think, that finned heatsinks, while radition of heat is at
play, operate more on the principle of conduction of heat into the air
which if not moved by a fan will then move by convection. Conduction of
heat is also at play with the transfer of heat from the outside
surfaces of the laptop to the surrounding air.<br>
<br>
OT: I once worked on a component for an LED display for a militiary
aircraft. There was lots of mass in the aluminum chassis and machined
mating surfaces to designed conduct heat away from the electronics into
the airframe. But there were no finned heat sinks. At 40,000 ft finned
heat sinks would be more-or-less useless as there is very little air at
those altitudes.<br>
<br>
JohnJ<br>
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