a heat engine (Fig. 2a) the first and second law obtain the form

: and
:

Here is the heat supplied at the high temperature T_H, is the heat removed at ambient temperature T_a, and P is the power delivered by the engine. Eliminating gives

The efficiency is defined by

If the performance of the engine is at its maximum and the efficiency is equal to the Carnot efficiency

Refrigerators

For refrigerators

1.Previous
3.Next