Metrics Overview

• ➤ Power Usage Effectiveness (PUE)
• ➤ Coefficient of Performance (COP)
• ➤ Energy Reuse Effectiveness (ERE)
• ➤ Total Heat Transported to SIG (kWh)
• ➤ Energy Reuse Factor (ERF)
• ➤ CO₂ Savings Metrics

Power Usage Effectiveness (PUE)

Definition: PUE determines the energy efficiency of a data center by comparing total energy use to IT equipment energy.

Formula: PUE = Total Facility Energy / IT Equipment Energy

Importance: A PUE closer to 1.0 signifies higher efficiency, indicating most energy is directed towards computing rather than ancillary services.

Global Average: Responding to a 2024 survey, 526 data center owners and operators reported an average annual power usage effectiveness (PUE) ratio of 1.56 at their largest data center. (Statista, 2024)

PUE Metric

Coefficient of Performance (COP)

Definition: COP measures cooling system efficiency, indicating how much cooling is obtained per unit of energy consumed.

Formula: COP = Cooling Output (kW) / Energy Input (kW)

Importance: A higher COP reflects a more efficient cooling system, crucial for reducing energy consumption and maintaining optimal temperatures.

COP Metric

Energy Reuse Effectiveness (ERE)

Definition: ERE determines the energy efficiency of reused energy in a data center.

Formula: ERE = (Total Energy Consumed – Reused Energy) / IT Equipment Energy

Importance: A lower ERE indicates higher energy efficiency and better use of waste energy.

ERE Metric

Energy Reuse Factor (ERF)

Definition: ERF measures the percentage of total energy consumed that is effectively reused for other purposes, such as district heating, instead of being wasted.

Formula: ERF = Reused Energy / Total Energy Consumed

Importance: A higher ERF indicates better energy reuse efficiency, helping improve sustainability metrics.

ERF Metric

Total Heat Energy (kWh)

Discover the total heat energy transported to SIG from November 12, 2024 till this moment.

Understanding CO₂ Emissions and Savings

This tool calculates CO₂ emissions associated with various heating sources and highlights the environmental benefits of reusing heat from our data center.

Emission Factors:

• Heating Oil: 0.308 tCO₂eq/MWh
• Natural Gas: 0.242 tCO₂eq/MWh
• Wood (NCN - Not Carbon Neutral): 0.460 tCO₂eq/MWh
• Wood (CN - Carbon Neutral): 0.056 tCO₂eq/MWh

NCN (Not Carbon Neutral): Emissions from wood burning without accounting for carbon offsets. This scenario reflects the maximum environmental impact.

CN (Carbon Neutral): Emissions from wood burning while accounting for carbon uptake during biomass growth. This scenario reflects minimal environmental impact.