A heat engine receives heat from a source at 1100 K at a rate of 400 kJ/s,

Question:

A heat engine receives heat from a source at 1100 K at a rate of 400 kJ/s, and it rejects the waste heat to a medium at 320 K. The measured power output of the heat engine is 120 kW, and the environment temperature is 25°C. Determine
(a) The reversible power,
(b) The rate of irreversibility, and
(c) The second-law efficiency of this heat engine.