Question

What is cop of carnot engine

Answer 1

By definition,

$\displaystyle COP = \frac{Q}{W}$

where where Q is the useful heat supplied or removed by the considered system and W is the work required by the considered system.

For Carnot cycle or Carnot engine,

$\displaystyle COP = \frac{T_H - T_C}{T_H} = 1 - \frac{T_C}{T_H}$

$T_C$ is the absolute temperature of the cold reservoir, and $T_C$ is the absolute temperature of the hot reservoir.