Specific Energy Consumption (SEC)
Specific energy consumption is the energy used per unit of output — kWh per tonne, per litre, per part. It normalises energy use to production volume, making it the core KPI for tracking efficiency and benchmarking sites or lines against each other.
SEC lets a plant separate genuine efficiency gains from changes in production volume: total energy can fall simply because output fell, but SEC reveals whether each unit got cheaper to make. It underpins ISO 50001 energy management, internal benchmarking between similar lines, and the business case for efficiency projects. Tracking SEC over time exposes drift and the impact of interventions.
Related terms
Energy Management System (EnMS / EMS) · ISO 50001 · OEE (Overall Equipment Effectiveness) · Carbon Intensity
Where this applies
Running a compressed-air leak survey programme · Retrofitting variable-speed drives · Optimising clean-in-place (CIP) · Integrating an industrial heat pump · Implementing an ISO 50001 energy management system · Sequencing and controlling multiple compressors · Matching a pump to its system curve · Optimising cooling tower performance