Mechanical engineering and energy systems · Energy systems
Thermal energy efficiency ratio
Calculate a measured useful-energy to supplied-energy ratio for a stated process boundary.
Method and scope
η = useful energy output ÷ energy input.
Use thermal energy efficiency ratio for educational calculation or a clearly scoped arithmetic estimate. Intended for Learners, General educational use.
Inputs- Useful energy output — J, kJ, Wh, kWh
- Energy input — J, kJ, Wh, kWh
SOURCE AND LIMITS
Assumptions: Both energy values use the same units and refer to the same process boundary and interval.
Limitations: A result above 100% can indicate inconsistent boundaries, measurement error, or unaccounted inputs; it is shown for diagnosis rather than silently capped.
Method version 1.0.0 · Unit registry and result provenance are shown after calculation. This tool is limited to the documented scope.Explore related fields
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