Datacenter migration, an important element of energy efficiency

Datacenter migration, PUE value, has always been a topic of concern to many data center managers. Everyone knows that the data center is a high energy consuming industry. The management of energy efficiency is equivalent to controlling the cost of the data center, but how can we effectively control the energy consumption of the data center?

Speaking of the main factors that affect the energy consumption of the data center, it must be the heat, the data center has a large number of IT devices running, which will send out a lot of heat, which require the same medium to carry the same cooling medium to counteract each other. So first of all, let's get to know what heat is? What are the kinds of heat?
In the process of heating or cooling, the absorption or discharge of heat that does not change its original phase state is called "sensible heat". It can make people feel obvious cold and hot changes. They can usually be measured by thermometers. For example, the heat absorbed by water from 20 to 80 degrees is called sensible heat. Latent heat: the phase transition of matter occurs (the change of state of matter) and the heat absorbed or released when the temperature does not change is called latent heat.
When the material changes from low energy state to high energy state, it absorbs latent heat and vice versa. For example, part of the latent heat absorbed by liquid boiling is used to overcome the attraction between molecules, and the other is used to resist atmospheric pressure during expansion. The heat of melting, vaporization and sublimation are all latent heat. The amount of latent heat is often expressed in terms of the mass per unit mass or the heat absorbed or released by each molar substance at the phase transition.
Sensible heat ratio (SHR)
The heat load is divided into two parts: the sensible heat and the latent heat. The elimination or increase of sensible heat will lead to corresponding changes in the temperature of the dry bulb thermometer. The latent heat is related to the increase or decrease of air humidity. The total cooling capacity of the air conditioning system is the sum of the latent heat and sensible heat capacity. The sensible heat ratio is the ratio of sensible cooling capacity to total refrigerating capacity. The sensible heat ratio (SHR) = cool cooling / total cooling capacity.