Re: cooling fan
- From: John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 30 Jan 2007 21:25:24 -0800
On 30 Jan 2007 17:42:05 -0800, "lerameur" <lerameur@xxxxxxxxx> wrote:
Hello,
I have a module which requires a heatsink. I want to add a fan about 3
inches away. My dilmena is this. Should I be blowing air on the heat
sink, or should I be blowing air out of the enclosed module. I made
hole all around so there is a breathing space.
ken
Hard to say, without knowing how much cooling you need. But the best
thing would be to have the fan intake cool air from outside, blast it
directly onto the heatsink fins at close range, and allow the heated
air to escape through vent holes.
The reverse would work almost as well: Have the fan exhaust air from
the box, and place the heatsink very near or in the only intake port.
Either way, you'd be forcing cool air through the heatsink fins. Given
a chance, air prefers to flow *around* the fins, so don't give it a
that option.
As Rich points out, you can blow air some distance directionally, but
you can't suck air directionally.
John
.
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- From: lerameur
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