Container air handling unit and cooling method

A modular cooling system configured to treat IT air generated by a data center, the modular cooling system comprising:

• a plurality of ISO containers located outside the data center and movably coupled to the data center:
• a supply duct configured to be selectively coupled to each of the plurality of ISO containers and to deliver conditioned air to the data center from the plurality of ISO containers;
• a return duct configured to be selectively coupled to each of the plurality of ISO containers and to deliver IT air to the plurality of ISO containers from the data center;
• and
• a plurality of cooling sub-system modules positioned within each of the plurality of ISO containers, the plurality of cooling sub-system modules being configured to operate in parallel to achieve total cooling effect or a lesser cooling effect within the data center, each cooling sub-system module comprising:
• a housing configured to support cooling equipment,
• an air-to-air heat exchanger supported by the housing to cool IT air supplied by the return duct, the air-to-air heat exchanger having at least one tube configured to direct IT air from one end of the air-to-air heat exchanger to an opposite end of the air-to-air heat exchanger and configured so that outdoor air circulates around the at least one tube, and
• a mechanical cooling system supported by the housing, the mechanical cooling system being configured to receive IT air treated by the air-to-air heat exchanger and to provide further cooling to the treated IT air, the mechanical cooling system including a compressor provided at a bottom of the housing, a refrigerator condenser coil disposed directly above the air-to-air heat exchanger, and an evaporator coil located downstream from the air-to-air heat exchanger, the arrangement being such that IT air treated by the air-to-air heat exchanger travels through the evaporator coil and is directed to an outlet port in fluid communication with the supply duct.