Enter the work output and the total heat input of a heat engine into the calculator to determine the thermal efficiency.
- All Efficiency Calculators
- Efficiency Ratio Calculator
- Thermal Conductivity Calculator (heat flux)
- Latent Heat Calculator
- LMTD (Logarithmic Mean Temperature Difference) Calculator
- CHP Efficiency Calculator
- Heat Exchanger Effectiveness Calculator
- Coaxial Heat Exchanger Calculator
- Fin Efficiency Calculator
Thermal Efficiency Formula
The following formula is used to calculate the thermal efficiency.
ηth = W / Q
- Where ηth is the thermal efficiency
- W is the work output (J)
- Q is the heat input (J)
To calculate the thermal efficiency, divide the system work output by the heat input.
Thermal Efficiency Definition
Thermal efficiency is the ratio of the work output to the heat input of a heat engine. In other words, the efficiency at which the engine converts heat to mechanical work.
Thermal Efficiency Example
How to calculate thermal efficiency?
- First, determine the input heat.
Measure the total heat put into the engine. For this example, we will say this is 10 J of heat.
- Next, determine the workout output.
Measure the total work produced by the engine. For this example, the work is 9 J.
- Finally, calculate the thermal efficiency.
Using the formula we find the thermal efficiency to be 9/10 = .90 = 90%
FAQ
Thermal efficiency is the rate or efficiency at which a heat engine converts heat to work.
No, in reality, heat engines will always have some losses associated with them.
