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Once the air has passed through the filters, it is sped by the fans through a watercooled grate and back into the datacentre.
The water is cooled by an exterior adiabatic cooling system, which circulates water through a large radiator-esque arrangement of pipes on the exterior of the facility. It then goes through the plumbing of an 800KW chiller — which only kicks in when ambient air temperature goes over 26°C — to the end grate, where it is then re-circulated back to the exterior cooling.
Photo credit: Jack Clark
Want to know more about PGS's 'lunatic fringe' computing? Read ZDNet UK's datacentre tour diary.