AIR CONDITIONING SYSTEM FOR DATA CENTER

PROBLEM TO BE SOLVED: To prevent a hot spot from being generated by adjusting the amount of the supply of cook air blown to the front of a rack according to the amount of the generated heat of the rack and reducing power to supply cool air.SOLUTION: There are provided a server utilization information conversion unit 22 that inputs in advance a straight line A representing a relationship between the server utilization rate and the amount of heat generated in the server, finds and inputs in advance for each rack the maximum airflow volume of a floor fan 4 required to cool down the temperature to a target temperature by removing the maximum amount of heat generated in a rack 7 when each server 6 of the rack 7 is at its maximum utilization rate, and controls the number of rotation of the floor fan 4 of each rack 7 based on a required airflow volume signal obtained by multiplying the maximum airflow volume of the rack 7 by an average amount of the generated heat of the rack obtained from an average utilization rate for each rack found from the utilization rate of each server 6 taken in from a management server 21, and a temperature correction calculation unit 28 that corrects the required airflow volume signal when a suction detection temperature of an upper thermometer 26 provided in a position corresponding to the suction inlet of the server in the uppermost shelf of the rack 7 is not lower than a set suction temperature.