A cooling unit for a data center comprises a fan section, a set of airstream diversion sections, and a set of cooling sections. The fan section is disposed at a front end of the unit. The set of airstream diversion sections includes one or more main airstream diversion channels and a rear airstream diversion channel. The airstream diversion section is configured to direct airflow from the fan section to the set of cooling sections. The set of cooling sections includes a main cooling section disposed at a side of the unit and a rear cooling section disposed at a rear end of the unit. Cooling modules may be arranged in series within each cooling section and among multiple cooling sections to manage a cooling fluid distribution corresponding to hot air inlets, to achieve more uniform temperature and better thermal management.
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