> consumption from 41 kW (electricity, probably same amount again for cooling)
I really doubt it. there is something profoundly wrong if an HPC-type datacenter, with completely conventional servers, air/DX cooling runs at a PUE of more than about 1.3-1.4. immersion cooling sounds appealingly unconventional, but if you think about the heatflow, you've still got to move it around. you still need a heatsink on the CPU with fins, some way to move the fluid past these fins and get them to the secondary heat exchanger. as with airflow management in a conventional DC, surely one has to ensure that cool fluid gets to the CPU fins and heated fluid finds its way to the rejection exchanger. surely convection wouldn't be good enough without some serious re-engineering. or do these systems rely on boiling? so I wonder what the effective thermal resistance is for such a fluid system (assuming some fishtank-like pumping). risk-wise, I'm pretty sure I'd be more comfortable with a heatpipe inside the chassis mating to a coldplate/exchanger built into the rack running the water loop. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
