On Sep 12, 2005, at 6:27 PM, Mike Marion wrote:
The new cooling racks that are being developed in different places, many usingwater (yay.. water in the DC) are interesting.
Leibert has some sealed-rack self-contained cooling systems that will do up to 14-16kW/32U, but their bypass venting requires one side of the rack to be free. They also have top-of-rack coolers that pull the hot air from behind (or the top) of the rack and dump cold air directly in front of the racks, as a supplemental cooling for updraft cooling rooms (cold air in the floor). All these units use non- liquid refrigerant run out to a heat pump unit, which has the heat exchanger for the chillers.
No matter how we cut it, we're going to have water in the DC anyway for two of the 35-ton air handlers which run off chilled water from campus Plant Services. Nice big 3" pipes, IIRC.
Gregory -- Gregory K. Ruiz-Ade <[EMAIL PROTECTED]> OpenPGP Key ID: EAF4844B keyserver: pgpkeys.mit.edu
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