appع

Definition

computer room air conditioning unit (CRAC)

A computer room air conditioning (CRAC) unit is a device that monitors and maintains the temperature, air distribution and humidity in a network room or data center. CRAC units are replacing air-conditioning units that were used in the past to cool data centers. According to Industrial Market Trends, mainframes and racks of servers can get as hot as a seven-foot tower of powered toaster ovens, so climate control is an important part of the data center's infrastructure.

There are a variety of ways that the CRAC units can be situated. One CRAC setup that has been successful is the process of cooling air and having it dispensed through an elevated floor. The air rises through the perforated sections, forming cold aisles. The cold air flows through the racks where it picks up heat before exiting from the rear of the racks. The warm exit air forms hot aisles behind the racks, and the hot air returns to the CRAC intakes, which are positioned above the floor.

 

>> Stay up to date by receiving the latest IT term daily. Simply check "Word of the Day" to register.

This was last updated in June 2008

Continue Reading About computer room air conditioning unit (CRAC)

Dig Deeper on Data center design and facilities

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

  • A small investment in time to execute these Windows Server performance tuning tips and techniques can optimize server workloads ...

  • A move to Office 365 doesn't require cutting the cord from on-premises Active Directory, but it is an option. Here's what you ...

  • In addition to fixing the exploited Windows flaw, Microsoft rolls out a new look to the Security Update Guide that draws some ...

  • Virtual clusters enable admins to deploy, track and manage containers across various systems to ensure performance, security and ...

  • Virtualized power systems promise to ease deployment and maintenance, but the market is still in its nascency.

  • Mini PCs are a low-cost hardware alternative to servers that enable organizations to maintain maximum data center features and ...

  • Stay on top of the latest news, analysis and expert advice from this year's re:Invent conference.

  • Familiarize yourself with user pools and identity pools in Amazon Cognito and learn how to better protect your workloads in a ...

  • There are many benefits to containerization as part of a migration, but only for the right type of app. If you're moving to Azure...

Close