Evaporative Cooling Data Centre Case Studies
Safehosts London SE1
EcoCooling had previously provided cooling for the Cheltenham data centre over 2 years previously where 2 separate installations had been done by Safehosts themselves. These installations had been monitored over the period and considered for all aspects of reliability, energy saving and efficiency.
The cooling of a centrally located, secure building with 30,000 ft2 spread across 4 data floors with an 880 server rack capacity -located in central London SE1. Maximum load 7MW
The Design Requirement
A modular construction that could reflect the population of the building, taking into account the low internal height of the floors and the weight limitations imposed by a traditional commercial building. The central London location also meant a high degree of filtration and a low noise requirement was imperative.
A radical new design of 30 coolers in stacks of 3 per floor will distribute the external air through the top of the cold aisles, using the access corridor as a mixing chamber. Filtration is achieved by using EU4 filters on the coolers themselves and EU4 panels on the cold aisle. Noise is reduced by the use of low energy EC axial fans located within the building which virtually eliminates the external noise.
The First Phase
is now complete comprising 6 working pods on the 1st floor. Each Pod is individually controlled with a master controlling the whole floor. The target cold aisle temperature is 18C which is maintained throughout the year. During winter this becomes 25% fresh air and 75% recirculated warm aisle air.
To date the data centre is running with an airflow of 100m3 per second (36,000m3 per hour) - facility-wide air change every 18 seconds (200 air changes every hour). It is anticipated that a world class PUE of 1.06 should be achieved at full facility load.