Evaporative Cooling Data Centre Case Studies
Unum Private Data Centre Cooling
While more companies are moving towards using co-location and cloud services, there are still many who still prefer or need to run their own private facilities. When Unum decided to refresh its private data centre it discovered that it could do a better job by improving its own facility and with new cooling technologies, meet tough corporate green standards.
John Considine, Senior Infrastructure Engineer says,“the EcoCooling CREC solution will provide us with adequate cooling even when the outside air exceeds 25°C and we could even stretch that to 30°C. On the few days of the year when the air temperature may be consistently above that threshold, we have the facility to use CRAC cooling.”
Meeting these standards was a big concern for UNUM which meant that traditional refrigeration based cooling technologies such as CRAC’s (Computer Room Air Conditioners) were not going to be suitable as the primary cooling approach. After looking at a number of options, UNUM decided that a fresh air Computer Room Evaporative Cooler (CREC) solution from Eco Cooling with a standby CRAC was the most efficient and resilient option.
Four side discharge EcoCooling CRECs were installed inside the building, with external louvres to regulate the flow of fresh air. Advanced cooling, aisle containment and low wattage LED lights have all delivered a Power Usage Effectiveness (PUE) of less than 1.3. Considine believes that over time the PUE figure will drop even lower. His confidence is based on the ability of the EcoCooling CREC solution to deliver high levels of power savings.
Additionally, the EcoCooling CREC solution uses Electrically Commutated (EC) axial fan technology – which moves high volumes of air using very low amounts of power – compared to a traditional forced air solution.
Overall, CREC units reduce the power required to cool a data centre by as much as 90 per cent compared to traditional data centre cooling. This means that to cool their data centre of 100kW, Unum only need to allow around 5kW for the cooling system.