Problem # 3 A heat engine operates between a source at TH and a sink at T₁= 30°C. If heat is supplied to the heat engine (QH) at a steady rate of 25 kJ/s (kW), then study the effect of TH on the Carnot cycle thermal efficiency. TH varies from 200 to 800°C. Plot the cycle efficiency versus TH and comment on the results.

Fig: 1