Re: diskless box: fanless too ?
Dean Carpenter's Mail
firstname.lastname@example.org on 05/05/99 09:07:00 AM
AFAICR, a heat pipe is a sealed pipe/tube, with a convection fluid inside.
It's not just a simple tube, but does have some structure within. Apply
heat to one end, and natural convection causes the fluid to circulate,
moving the heat to the other end.
I remember seeing a 1 meter heat pipe at school in Sydney Aust. way back
We took turns feeling one end while the teacher lit a match at the other
It only took a few seconds to feel our end get warm, then hot. Pretty cool
Subject: Re: diskless box: fanless too ?
On Tue, 4 May 1999, John C. Ellingboe wrote:
>Michael Stenner wrote:
>> I disagree that the cpu would need a fan - I used to run a very old P60
>> (a REALLY hot chip) without a fan (fan kept breaking...) and it was
>> toasty but caused no problems. If you choose a cpu that runs cool, you
>> should be OK. You can also look into thermoelectric (or Peltier)
>> coolers -- no moving parts.
>You still have to get the heat (cpu + Peltier device) out of the box.
>Even though the cpu will be cool, when using a Pelier device the box
>will become quite toasty. One of the heat pipe devices would be a
>better choice. There you would have a heatsink plate mounted on the
>cpu and a tube running out side the case to a heatsink.
Admittedly, I may not be as cautious as I should be about these things,
but it doesn't seem to me that the box would necessarily get
dangerously hot. When I was doing it, I left the box open, but as I
said, that was a VERY hot chip.
I've never heard of a "heat pipe", but that sounds quite nice.
I'm a little confused: is it a true pipe (i.e. with air inside) that
relies on convection? or is it something like a copper rod?
I must also say that the suggestions about controlling the
Peltier cooler are quite good. You can buy a ready-made device for