Sustainability assessment

[JLehr]

View assessments in IT Expert on the Reports > Assessments tab.

Improve inefficiencies through insight into the estimated Level 1 Power Usage Effectiveness (PUE) of your physical infrastructure in the Sustainability assessment. 

PUE and DCiE are calculated at the Room level only. Outgoing power from all the UPSs in the room is the indicator of IT load. Metrics are derived from devices and sensor values. 

In locations with at least one room and at least one UPS, view the estimated Level 1 PUE and DCiE yearly averages or monthly trends per room over the last 365 days. 

PUE

Power Usage Effectiveness (PUE) is the industry-accepted energy efficiency metric for the physical infrastructure systems that support the IT loads of a data center, for example, power and cooling. 

PUE is the total facility power divided by the IT load.

DCiE

Data center infrastructure efficiency (DCiE) is a metric used to determine the energy efficiency of a data center, developed by The Green Grid.

It is shown as a percentage, calculated by dividing the IT load by the facility power. 

DCiE = IT load / total facility power x 100%

Since exact measurements of utility power are not possible in IT Expert, the Sustainability assessment provides an estimated simple Level 1 PUE and DCiE calculations.

Overview

See the number of rooms in the selected location that have a PUE calculated and are considered Efficient, Average, or Inefficient based on DCiE percentage, limited to 50 rooms per location at this time.

• Efficient: DCiE 62.5% or above
• Average: DCiE 38.5% - 62.5%
• Inefficient: DCiE below 38.5%

Room details

View the PUE, DCiE, Cooling, and detailed energy load information for the past 365 days for each room in locations with at least one room and at least one UPS. 

Calculation factors are Power redundancy, Cooling redundancy, and the Cooling medium. The margin of error shown for PUE ( +/- ) is adjusted depending on the information you provide.

You can toggle between yearly PUE values and monthy trends.

Yearly averages

See yearly averages for up to three full calendar years.

Monthly trends

See monthly trends for the last 36 months. You can compare each year to see other trends, such as seasonal temperature changes. 

Detailed energy load information

• Cooling: The energy used by cooling equipment in the selected room
• IT: The energy used by the IT equipment in the selected room. This is used in the PUE calculation.
• Power: The energy used by the power equipment in the selected room
• Total energy: The total energy load in the selected room

Improve your estimate

Click Improve your estimate to provide information about the calculation factors that influence estimated efficiency:

• Power redundancy: 2N, etc.
• Cooling redundancy: N1, etc
• Cooling medium: Air cooled; Liquid cooled; Chilled water; No cooling; Direct expansion; Not specified
• Cooling setup: When available for the selected cooling medium
• Selected devices for IT load: Filter to include only the devices you want to include in the calculation.

Note: On the mobile app, you can view the sustainability data only. Log in to IT Expert on a computer to modify configurations to improve the PUE score.

Select devices contributing to IT load

Selecting or deselecting a device impacts the IT load used in PUE calculations.

Select the devices you want to include in the PUE calculation.

All applicable devices in the room are automatically included in the calculation until you specifically deselect them.

Schneider Electric white papers

Electrical Efficiency Measurement for Data Centers

DCOI Compliance: A Guide to Improving PUE in U.S. Federal Data Centers

Continuous Metering and Monitoring of PUE in Data Centers

Calculating Total Power Requirements for Data Centers

Guidance for Calculation of Efficiency (PUE) in Data Centers