Date center local cooling system with pre-cooling chiller

A data center local cooling system with a pre-cooling chiller comprising:

• a pre-cooling chiller that is installed outside a data center, cools cooling water circulating along an interior thereof by heat exchange with first and second refrigerants, and discharges the cooling water;
• a plurality of refrigerant distributors that are connected to the pre-cooling chiller through a cooling water flow line through which the cooling water flows and a third refrigerant flow line through which a third refrigerant flows, cool the third refrigerant with heat exchange between the inflow cooling water and the third refrigerant, and discharge the third refrigerant;
• a plurality of in-row air conditioners that are disposed between server racks in an interior of the data center, are connected to the refrigerant distributors through the third refrigerant flow line through which the third refrigerant flows, cool indoor air with heat exchange between the third refrigerant flowing through the interior and indoor air flowing in a hot zone of the server rack, thereby discharging the cooled indoor air to a cool zone;
• and
• a control unit that is electrically connected to the pre-cooling chiller, the plurality of refrigerant distributors, and the plurality of in-row air conditioners, and controls operations of the pre-cooling chiller, the plurality of refrigerant distributors, and the plurality of in-row air conditioners based on a temperature of external air.