Re: cooling systems

[Eric Kuhnke <eric () fnordsystems com>]

The Arctic Region Supercomputing Centre in Fairbanks, Alaska would be a 
good candidate for this...
   * <http://www.arsc.edu/resources/yukon.html>Yukon -- 272-processor CRAY 
T3E
   * <http://www.arsc.edu/resources/chilkoot.html>Chilkoot -- 32-processor 
CRAY SV1ex
   * <http://www.arsc.edu/resources/klondike.html>Klondike -- 
512-processor CRAY X1
   * <http://www.arsc.edu/resources/icehawk.html>Icehawk -- 200-processor 
IBM SP
   * <http://www.arsc.edu/resources/iceflyer.html>Iceflyer -- 32-processor 
IBM Regatta
   * <http://www.arsc.edu/resources/iceberg.html>Iceberg -- 800-processor 
IBM System
   * <http://www.arsc.edu/resources/rime.html>Rime -- 8-processor CRAY SX-6
http://www.arsc.edu/

For those who have never visited Fairbanks, there is a phenomena observed 
at -15C and lower known as "square tire".  The rubber in tires of parked 
vehicles will become stiff and freeze into position, making the vehicle 
impossible to move without destroying the tires.  To the best of my 
knowledge the ARSC does have conventional AC units, as Fairbanks reaches 
+24C and higher in mid summer.

-Eric Kuhnke

At 11:49 AM 11/5/2003 -0600, you wrote:

> I've seen some designs that actually use water as the transport and
> many-finned radiators at each end.  Radiator transfer heat into cold water
> inside which is pumped up a radiator in the sub-zero temps on the roof and
> exchanged and then looped back.
>
> Same basic principle as a traditional residential heat-pump that loops
> through the ground 20 feet down or so.
>
> I think using straight air would probably not be as efficient as a
> closed-loop water transfer.