Problem # 3 H A heat engine operates between a source at T₁ and a sink at T₁= 30°C. If heat is supplied to the heat engine (Q₁) at a steady

rate of 20 kJ/s (kW), then study the effect of T₁ on the Carnot cycle thermal efficiency. T₁ varies from 300 to 1000°C. Plot the cycle H H efficiency versus T₁ and comment on the results. H