How Energy & Power Systems Work
Energy & power systems guide

Power-Generation Efficiency

Understand the difference between conversion efficiency, heat rate, auxiliary loads and net output.

Systems note: terminology, market structures, voltage classes and reliability rules vary by jurisdiction. Use current local standards and utility information for real projects.

Where this fits

Understand the difference between conversion efficiency, heat rate, auxiliary loads and net output.

Core system ideas

Efficiency compares useful electrical energy with input energy across a defined boundary.

Gross generator output is higher than net station output when plant auxiliaries consume part of the electricity.

Different technologies use different efficiency concepts, so comparisons require consistent boundaries.

Interfaces and tradeoffs

Generation interacts with fuel or resource availability, plant auxiliaries, transmission capability, maintenance and system demand. Nameplate capacity alone never describes the full operating contribution.

What organizations measure

Net efficiency, heat rate, auxiliary consumption and energy output.