Technology: Precise hygrothermal control
Solution: Cooling of small-to-medium size Data Center racks
Cooling: Sensor Blower
The rack coolers in the HiRef NRCD range offer an ideal solution for the cooling of small-to-medium size Data Center racks where precision control of hygrothermal parameters is required 24/7. They are particularly suitable for small installations where a chiller cannot be used or where restrictions do not allow for the presence of water in the Data Center. Internal design and component selection focus on the achievement of very high energy efficiency levels to minimise the running costs of the entire system. Depending on how rack cooling is done – by creating hot and cold aisles in the Data Center or via compartmentalisation and localised cooling – the NRCD range is available in two different configurations: – the “In Rack” configuration in which a closed circuit between rack cooler and rack is created; -the “In Row” configuration in which cold air is released into the cold aisle towards each rack and the warm air is drawn from the rack cooler in the “hot aisle”. The Hiref Sensor Blower® allows temperature measurement in the hot aisle (unit return) with the fans off; this ensures fast restoration of the set-point, precision control of temperature and, above all, avoids wasteful use of electricity. As cooling demand varies, the integrated microprocessor allows combined modulation of air flow – via control of the EC fans (as standard) – and cooling capacity, via speed control of the DC inverter compressors (as standard). This ensures not only precise adjustment of ambient hygrothermal parameters but also maximum energy savings at partial loads. All the models in the NRCD range have heat exchange coils with hydrophilic coating of the fins. This special coating – together with proper design of air through-flow speeds – eases condensate collection during the dehumidification process, thus avoiding the serious consequence of droplets being carried towards the unit exterior. The internal design and the carefully arranged component layout provide an evaporating coil with an extensive heat exchange surface area. The unit footprint remains small, ensuring optimal use of space in the server room.