# Carnot Efficiency

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Carnot efficiency, abbreviated as $$n_{max}$$, a dimensionless number, is the theroetical maximum efficiency of any heat engine depending only on the temperatures it operates between.

## Carnot efficiency formula

 $$\large{ n_{max} = 1 \;-\; \frac{ T_c }{ T_h } }$$

### Where:

$$\large{ n_{max} }$$ = Carnot efficiency

$$\large{ T_c }$$ = absolute temperature of cold source

$$\large{ T_h }$$ = absolute temperature of hot source