The greatest enhancement when lack of energy use in data centers is improved cooling efficiency since cooling could take a considerable portion of all the facility power. The introduction of the liquid cooling systems is one of the best methods since it is more efficient to transport heat as compared to the conventional air systems. This will lower the energy used by fans and chillers and will cut down the overall cooling energy demand. The other important technique in the way to minimize energy consumption in data centers is the incorporation of intelligent control systems like variable frequency drives of pumps and fan motors. Such systems automatically regulate the speed of the motor based on actual demand and this saves a lot of energy that would be wasted when the load is low. The extraneous mixing of warm and cool air is also avoided by more efficient control of airflow. This design reduces the amount of power needed in the fan and enables the operators to make maximum use of setpoint temperatures without jeopardizing the health of the server. Energy can also be reduced by choosing high efficiency motors and drives, under part-load in constant-speed operation, the energy level consumed by the motors can be reduced by a half despite the presence of VFDs on the motors. Another important factor in how to reduce energy use in data centers is to optimize IT workload and power allocation to reduce heat generation at its source and limit the cooling load as well as the overall power expenditure.
