Does the word "sink" in "heat sink" refer to the
ability of a device that is cooler than something else, and its
ability to use thermodynamics to use that temperature difference
to draw heat from the hot thing into the cold thing?
Then I suppose that mass matters.
Sooner or later thermal equilibrium might be reached and then
the thing that was cooler and drawing the heat from the hot
thing needs to be cooled off and maybe that's where the radiator
part comes into play.
Then surface area in the way of wind means that the wind will be
able to absorb heat from the hotter thing, faster, but the wind needs to be
sent somewhere else or it too will be just as hot as the radiator.
The very end result will be the heat death of the universe, where
everything will be the same temperature as everything else.
Then we can all start over.
Hal Mandel
W4HBM
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Tom W8JI
Sent: Monday, August 14, 2006 12:23 PM
To: amps@contesting.com
Subject: Re: [Amps] Anodizing aluminum, painting etc.
>>Heat dissipation has nothing to do with mass.
>
> ------------ REPLY SEPARATOR ------------
>
> Really? So why do heat sinks come in different sizes?
> Might as well
> use the smallest one possible, right? Carried to the
> extreme, why use
> a heat sink at all? Mass = zero should work fine.
When did mass = heat transfer?
Dissipation is the ability to get rid of energy, in this
case transfer heat from one place to another.
Mass is the property of matter that indicates an object's
resistance to changes in either speed or direction of
motion.
If mass was important to heatsinks they would be made from
lead or they would all be Catholics.
Mass is also important if you throw a heatsink at a problem.
73 Tom
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