On 5. des. 2012, at 10:50, Jörg Saßmannshausen <[email protected]> wrote:
> Dear all, > > I am sure the subject has been covered a number of times, however, I have > been > to the Machine Evaluation Workshop last week here in Liverpool and this > company here > http://www.iceotope.com/ > done something which I found rather unusual. Rather then using pipes to cool > the CPUs or dipping the whole node into silicon oil (messy) or water, they > are > using a hydrofluoro carbon compound to move the heat from the motherboard to > a > chilling plate. There are pros and cons of course. As the whole motherboard > is > sealed into the box you cannot change it yourself. It needs to be send back > to > them. On the flip side, it appears the the excess heat could be used a bit > more > efficiently. Seymour Cray pioneered the fluorocarbon cooling in the Cray-2, I believe he used some 144 gallons of the stuff for the whole machine which was housed in a tank with transparent windows "so you could see more Cray":-). The liquid was pumped around and cooled in a heat exchanger. This molecules in this type of liquid can be designed with different boiling temperatures. As far as I can recall one version (not the one used by Cray) can boil at 27 degrees C at normal atmospheric pressure and such be used in a heat pipe without having to actively pump it around. > I was wondering whether somebody has some experiences with 'water' cooling in > HPC and would like to share it with me? I am thinking of getting something > like that or similar (no decision has been made right now) for the next > server > I am getting. However, as that is new technology to me (the 'water' cooling), > before I venture into that I would like to hear some first hand experiences, > not necessarily with the company/product mentioned above which is only an > example here. > > All the best from a wet London > > Jörg > > -- > ************************************************************* > Jörg Saßmannshausen > University College London > Department of Chemistry > Gordon Street > London > WC1H 0AJ > > email: [email protected] > web: http://sassy.formativ.net > > Please avoid sending me Word or PowerPoint attachments. > See http://www.gnu.org/philosophy/no-word-attachments.html > > _______________________________________________ > Beowulf mailing list, [email protected] sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf Einar Rustad, VP Business Development [email protected] Mob: +47 9248 4510 _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
