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Higher efficiency raised floor cooling for data centres

28 June 2015

Two new Rittal precision climate control units have demonstrated marked improvements in the energy efficiency of data centre raised floor cooling systems.

The CRAC (Computer Room Air Conditioner) CW and CRAC DX room climate control units can dissipate up to 167kW of heat and (when combined with power-saving free cooling) will also help reduce operating costs. 

Easy to fit to raised floor systems, both the CRAC CW and CRAC DX precision climate control units meet the needs of IT loads in data centres. 

The energy savings they deliver are achieved by using innovative technologies such as EC (electronically commutated) motors and scroll compressors.

They act by cooling the hot air that has been sucked into a closed heat exchanger. The CRAC CW uses water cooled in a chiller system outside the building. The DX has a refrigerant with an externally mounted condenser unit. Both systems then blow the cold air back into the data centre via the raised floor. 

All server suppliers now have approved so-called free cooling (making use of the outdoor temperature) as typically sufficient to cool data centres in Germany and other European countries.  The lower the outdoor temperature, the greater the likelihood that free cooling will be adequate and that no compressors will have to be switched on.

Both CRAC CW and CRAC DX combine seamlessly with indirect free cooling systems, cutting energy bills and the operating costs of the data centre greatly.

The units are delivered fully assembled. Before delivery, a functional test is carried out in accordance with the current version of European directives 2006/42EG, 2006/95EG, 2004/108EG and 97/23EG.

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