Re: What's better, extruded heatsinks or ma chines heatsinks?

You still have to have a very efficient heatsink to pull the heat
from the hot side of the TEC. You are also then back into a power
supply issue. This approach, although something I am a big fan of in
general, would be massive overkill for the Geckos as there is no
benefit in getting them to run below room temperature.

The same would apply to water cooling. Although each have a certain
gee-whiz appeal, the Geckos simpy do not need it.

I have several computers each with various incarnations of TECs and
liquid cooling. Lots of fun, but high maintenance.


Barry

--- In CAD_CAM_EDM_DRO@y..., dlantz@a... wrote:
> i would concider a peltier junction (try allelectronics.com) its a
little
> device that 'pulls' heat from one of it's surfaces to another,
supposed to
> be the best, short of refrigeration coils... (as they are much more
> efficient)---Dave L.
>
> -----Original Message-----
> From: rab@r... [mailto:rab@r...]
> Sent: Sunday, February 17, 2002 3:00 AM
> To: CAD_CAM_EDM_DRO@y...
> Subject: [CAD_CAM_EDM_DRO] Re: What's better, extruded heatsinks or
> machines heatsinks?
>
>
> Some folks building high performance or overclocked computers lap
> both the heatsink and CPU with progressive grades of wet and dry
> paper on a sheet of plate glass, then use a tiny amount of silver
> paste. ( note. don't try this at home on your CPU )
> Looks like I'll be doing this to my Gecko 340s as a couple of
screws
> extrude slightly from the face, making a good heatsink contact
> impossible.
>
> Rab
>
> >
> > It generally makes no difference. One thing is that extruded heat
> > sinks may not have a truly flat surface for the heat source to be
> > clamped to. So, you might need to machine that flat. Some do
> > come out very flat, but I've seen some that are way off of flat.
> > Otherwise, thermal conductivity doesn't vary much either way.
> > make sure you use a thermally conductive grease or silicone
> > pad to transfer heat from the Gecko to the heat sink. Bolting
> > two nearly flat surfaces together can provide VERY poor thermal
> > transfer without something to bridge the gaps.
> >
> > Jon
>
>
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