KØLING AF ET DATACENTER

A data center power system comprises: a plurality of server racks (102) aligned within a row in a human-occupiable workspace (110) of a data center, the server racks (102) supporting a plurality of heat-generating computing devices; a warm air aisle (116) positioned adjacent the server racks (102) opposite the human-occupiable workspace (110) and comprising a warm air inlet adjacent to a back side of the row of server racks (102) and a warm air outlet in fluid communication with a warm air plenum; a plurality of cooling modules (106) positioned to circulate a cooling airflow from the human-occupiable workspace (110), through the server racks (102), and to the warm air aisle (116). Each of the plurality of cooling modules (106) comprises: at least one fan (201-203); a main power bus electrically coupled to the at least one fan and to a main power source to receive alternating current, AC, power; and a transformer electrically coupled with the main power bus. The system further comprises a control power bus electrically coupled to each of the transformers of the plurality of cooling modules to receive direct current, DC, power transformed from the AC power and a controller (108) electrically powered by the control power bus and communicably coupled to each of the plurality of cooling modules (106) to control the plurality of fans in the plurality of cooling modules to operate at a specified fan speed. At least one sensor associated with a first cooling module is electrically coupled to the control power bus to receive DC power from a transformer, through the control power bus, associated with a second cooling module.