The plenum below the raised floor (see Figure 1) allows air to flow at a specific cubic feet per minute (CFM). If heat density increases, you need to increase air flow from the CRAC unit, and if heat density decreases you must lower it. Hence the need to understand the load on the data center in determining the size of CRAC units. A smaller footprint allows more computing equipment and power in a smaller area, resulting in greater heat dissipation. Today, servers are placed in racks to reduce their physical footprint. Out of this, 15% is consumed solely by the CRAC unit the remaining 20% by the air distribution system.Įarlier, servers were set up in the form of towers. The other 50% is consumed by auxiliary equipment required to run the IT systems.Ĭooling consumes more than 35% of the 50% power consumption of the auxiliary equipment.50% of the power is consumed by the main hardware including servers, storage and networking equipment. The typical power consumption trend in today’s data centers is as follows:
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