Quickly calculate the thermal efficiency for heat engines, power generation systems, and thermodynamic cycles. Our Thermal Efficiency Calculator helps engineers, students, and enthusiasts determine how effectively a system converts heat input into useful work. Understand the performance of engines, turbines, and refrigerators with ease. Input heat added and heat rejected to find your efficiency percentage instantly and optimize system performance.
Formula:
The fundamental formula used to calculate thermal efficiency (η) for a heat engine is:
η = ((QH - QC) / QH) × 100%
Where:
- η is the Thermal Efficiency (expressed as a percentage).
- QH is the Heat Input (the total heat energy absorbed by the system from a high-temperature source, e.g., from fuel combustion).
- QC is the Heat Rejected (the total heat energy expelled by the system to a low-temperature sink, e.g., exhaust heat).
Alternatively, if the useful work output (W) is known, the formula can be expressed as:
η = (W / QH) × 100%
This calculator utilizes the heat input and heat rejected values to determine efficiency.