Thermal Efficiency

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Thermal efficiency, abbreviated as \(\eta_{th}\) (Greek symbol eta), a dimensionless number, is the fraction of heat that is converted to work or desired output divided by required input.

 

Thermal efficiency Formulas

\(\large{ \eta_{th}  =  \frac{ W }{ Q_H }  }\)   
\(\large{ \eta_{th}  =  \frac{ Q_H \;-\; Q_C }{ Q_H }  }\)  
\(\large{ \eta_{th}  = 1 -  \frac{ Q_C }{ Q_H }  }\)  

Where:

\(\large{ \eta_{th} }\)  (Greek symbol eta) = thermal efficiency

\(\large{ W }\) = work out

\(\large{ Q_H }\) = heat input

\(\large{ Q_C }\) = waste heat

 

Tags: Equations for Thermal Equations for Welding Equations for Efficiency