Computer room air conditioning

The CRAC computer room air conditioning system is designed for installation and use in low- and medium-density data centre and computer processing environments.

The system operates by drawing in warm air from the server enclosures at the top of the unit and then cooling it either with water or refrigerant R407c in a closed heat exchanger. The cooled air is filtered and blown under positive pressure to the false floor from where it rises into the cold aisle.

A fan positioned in the raised floor itself enables the cooled air to be distributed unimpeded in the raised floor area, while making more space available in the enclosure itself for a larger heat exchanger. In addition, unnecessary diversions of the airflow can be avoided and flow resistance minimised, resulting in a claimed 10-30% efficiency increase.

The system also keeps humidity at a constant level. The system is available in output ratings 17 to 125 kW effective cooling capacity and can be easily integrated into an existing IT infrastructure in terms of both hardware and software.