PUE, a key performance indicator
The PUE is defined in EN 50600-4-2: Data processing center facilities and Infrastructure, part 4-2: Power Usage Effectiveness.
The PUE represents the ratio between the total energy consumed by the data center and the energy needed for IT equipment.
To accurately assess a data center's actual performance, the IT servers' consumption monitoring device must be positioned as close as possible to the installed equipment.
The PUE identifies areas for improvement specific to processes, design, and operational efficiency.
A target value will be set for the design of new data centers and used as a target for energy management.
In 2020, the average PUE for all data centers was 1.6. The design of the latest generation of data centers can achieve values of less than 1.4.
How to calcul the PUE ?
Recommendations for determining the PUE
The PUE can be calculated at different levels of the installation (PUE1, PUE2 or PUE3).
PUE3 is recommended. It provides better visibility over energy consumption and data center losses to determine the drivers for improving energy efficiency.
Changes in the PUE must be correlated with other data that influence energy consumption (energy quality, environmental data, etc.)
The precision of consumption-measuring devices must be taken into account in assessing the accuracy of the PUE calculation.
Data should be readily available and easily transferred to an Edge or Cloud tracking platform.
Basic level of resolution of energy performance data
Intermediate level of resolution of energy performance data
Advanced level of resolution of energy performance data
DIRIS Digiware measurement and monitoring system
The DIRIS Digiware measurement system meets the requirements of the EN 50600-4-2 PUE3 category, respecting and ensuring consumption measurements from the main power supply to the servers.
Its precision class means the DIRIS Digiware delivers accurate measurements of the PUE. Implementing the of DIRIS Digiware system in a tap-off or PDU setup for the entire electrical installation gives a detailed mapping of the data center's consumption distribution and losses.