Combination rack system for discharging hot air separately, and system and method for cooling data center using the combination rack system

A cooling system of a data center, comprising

• a combination rack system comprising first and second racks and a plurality of cooling fans, the first and second racks being spaced apart from each other with rear sides of the first and second racks facing each other, the cooling fans being disposed between the spaced first and second racks;
• a discharge pipe connected to an upper portion of the combination rack system;
• a docking part for connecting the combination rack system and the discharge pipe;
• a discharge fan disposed between the discharge pipe and the docking part for discharging air from the combination rack system to the discharge pipe;
• an inlet disposed at one side of the discharge pipe for introducing outside air into the discharge pipe;
• and
• an outlet disposed at the other side of the discharge pipe for discharging air from the discharge pipe.

A method for cooling a data center, comprising:

• discharging hot air generated from a combination rack system in which rear sides of racks face each other;
• directing the hot air discharged from the combination rack system to a discharge pipe;
• and
• introducing outside air into the discharge pipe through one side of the discharge pipe to discharge the hot air from the discharge pipe through the other side of the discharge pipe using the introduced outside air.