An algorithm resident on the controller controls the controller to enter a low ambient cooling mode when the temperature of the ambient air is less than a set temperature.

当环境空气的温度低于设定温度时，在控制器上的算法控制控制器进入到低温环境冷却模式。

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They are curbing run-away energy with a combination of micro-level controls (for individual servers, power distribution units, air-flow controllers, and cooling units) as well as macro-level controls and policies (for racks of servers, rows of racks, and entire data centers).

FORBES: The Growing Energy Demands Of Living Your Life In The Cloud