[Beowulf] 96 cores in silent and small enclosure

Prentice Bisbal prentice at ias.edu
Thu Apr 8 06:48:01 PDT 2010

Jonathan Aquilina wrote:
> i know there is non conductive water which if it gets on something
> shouldnt conduct electricity but how safe is a water cooled system?

Pure water (distilled, deionized water) will not conduct electricity. We
consider water to be electrically conductive because of the ions created
by dissolved minerals in it, which are almost always present in water.
Unless you handle the distilled, deionized water very carefully, odds
are pretty good that it will come into contact with something that can
dissolve in it to produce ions. This "something" can be metal pipes, or
even gases. Polymers, like PEX tubing, should be safe.

In a typical water-cooling system, where the water doesn't come into
direct contact with the electronic components, its safety depends on the
durability of the materials used to contain it. and the liquid-tightness
of the connections.

For a boiling system like Jim Lux brought up, it's very unsafe, since
odds are good it will come into contact with something that will produce
dissolved ions in it and make it electrically conductive.


> On Thu, Apr 8, 2010 at 12:04 AM, Jack Carrozzo <jack at crepinc.com
> <mailto:jack at crepinc.com>> wrote:
>     Water cooling for computers just uses the water to suck away heat, not
>     the boiling business (which is, however, very smart). A block from the
>     processor has a lot of surface area through which the water flows, so
>     the temperature differential between the water and the block is small
>     compared to other applications of liquid cooling. Hence no issues.
>     -Jack Carrozzo
>     On Wed, Apr 7, 2010 at 3:57 PM, Jonathan Aquilina
>     <eagles051387 at gmail.com <mailto:eagles051387 at gmail.com>> wrote:
>     > then if that is a problem then how does water cooling work?
>     >
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> -- 
> Jonathan Aquilina

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