ERAC Energy Data Analytics & Reporting Flashcards

Which key performance indicator (KPI) measures the ratio of useful energy output to total energy input in a facility?

Answer: Energy Utilization Index (EUI)

The Energy Utilization Index (EUI) measures energy consumption per square foot per year and is a primary KPI for benchmarking building energy performance.

In energy data analytics, what does an M&V (Measurement & Verification) protocol primarily confirm?

Answer: Actual energy savings achieved from efficiency measures

M&V protocols, such as those outlined in IPMVP, confirm that energy savings from efficiency measures are real and quantifiable.

Which regression analysis technique is most commonly used to establish an energy baseline from historical consumption data?

Answer: Ordinary least squares (OLS) linear regression

Ordinary least squares (OLS) linear regression is the standard technique for developing energy baselines that correlate consumption with independent variables like degree days.

What is the primary purpose of an energy dashboard in a continuous monitoring system?

Answer: To provide real-time visualization of energy consumption and anomalies

An energy dashboard provides real-time or near-real-time visualization of consumption data, enabling operators to detect anomalies and identify savings opportunities.

When normalizing energy data for weather, which variable is most commonly used for heating energy analysis?

Answer: Heating Degree Days (HDD)

Heating Degree Days (HDD) normalize energy consumption data for heating systems by quantifying how cold the weather was relative to a base temperature (typically 65°F).

In energy reporting, what does the term 'sub-metering' refer to?

Answer: Measuring energy consumption at the equipment or system level below the main utility meter

Sub-metering installs additional meters downstream of the main utility meter to measure energy consumption by specific equipment, systems, or zones within a facility.