When visiting our hosted data center a couple of years ago, I saw they had hung heavy plastic from the ceiling to the top front of the racks. It is attached just inside of the doors. They also put filler bars in all the rack empty spaces. The data center has under floor A/C with holey floor tiles in front of the racks. The air returns are in the ceiling behind the racks.
We duplicated this, without the raised floors, but put the exhaust ducting in front of the racks and the returns behind the racks. (Dam cold if you are standing at the pull out console.) We also have two units that alternate, (don't ask me how as I want nothing to do with this.) Each A/C exhaust is alternated in the ceiling as you go down the row of racks. We have 5 Dell racks full of intel processors and one IBM rack with 2 iSeries and two NAS servers. All the Dell racks are bonded together with no side panels in between them. Everything is also bolted to the concrete floor. (Hey we are in Sunny California.)
Director of Information Services
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Thursday, January 30, 2014 6:15 AM
Subject: Computer room cooling
Man, one of those laser temperature guns like below:
Really shows you where your computer room hot spots are.
I really think it would be more efficient if we ducted our racks.
I should probably also be concerned that the breaker boxes on the loading
dock shows a few breakers well over 80o when the ambient temperature
surrounding them is under 60o.
These breakers control HVAC units on the roof. Another concern about
these is that when they blow they don't blow their individual breaker.
They blow the breaker which feeds their breaker box. Which also happens
to feed our computer room UPS. See my concern?
This breaker is a special one you will never see in a home application.