In this article we discuss some of the key issues which need to be understood in order to improve computer room and data centre cooling and airflow.
The vast majority of computer rooms are cooled by air conditioning systems that attempt to deliver cold air to hot IT equipment placed in racks.
A few systems use cold water pumped around the rack and there are even some exotic solutions using liquid carbon dioxide and even chip level cooling. The majority however use cold air derived from direct expansion or chilled water-fed air-conditioning units, sometimes augmented by free cooling circuits.
The amount of cooling capacity delivered to an equipment rack depends upon the design of the system and how effectively it has been implemented.