The most important function of a data center’s cooling system is to maintain the proper environmental conditions suitable for IT equipment operation. To achieve this, it is required to remove heat produced by IT equipment and transfer that heat to a heat sink. In most data centers, the cooling system
A VFD controls the frequency of the power supplying AC motors, such as those found in the compressors of chilled water cooling systems. It controls the speed of the motor, adjusting the input frequency and voltage. The motors on compressors are sized for the maximum capacity of the system. However, they need to run at only a fraction of this capacity for the majority of the time. The VFD will match the motor speed to the demands being placed on the system.