Glossary · Energy and utilities automation
Energy performance indicator (EnPI)
Also known as: EnPI, Energy KPI
German: Energiekennzahl (EnPI)
In energy management, an energy performance indicator (EnPI) is a measure or unit of energy performance, as defined by the organization. It can be a simple measured value, a ratio such as energy per unit of output, or a statistical or engineering model.
- Energy
- Standards
In one sentence
An energy performance indicator (EnPI) is a measure of energy performance, such as kWh per ton produced, defined by the organization.
Example
The bakery tracks the EnPI "kWh of gas per ton of bread" for each oven line and compares it monthly with the baseline.
How it applies
- Energy management: EnPIs show whether energy performance improves. They should be chosen so that they respond to what the organization can influence.
- Engineering: Calculating EnPIs requires energy data and relevant variables, such as production volume, from the same period and scope.
- Operation: EnPIs displayed close to the process help operators see the effect of settings and behavior.
- Documentation: Each EnPI needs a documented definition: formula, units, data sources, boundaries and normalization. Without it, values cannot be compared over time or between sites.
Energy performance indicator vs. specific energy consumption
Specific energy consumption (energy per unit of output) is one common type of EnPI. EnPIs can also be absolute consumption values or regression models that account for several variables.