1 2 Which of the following methods can be used to increase t

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Which of the following methods can be used to increase the efficiency of a Rankine Cycle? Using a portion of the mass flowing through the high pressure turbine to preheat the fluid going into a) the boiler. b) Superheating the working fluid in the boiler. c) Increasing the boiler pressure above the critical pressure. d) All of these method would increase thermal efficiency.

Solution

1)All the three methods would increase the thermal efficiency

2)The Isentropic efficiency of a turbine is a comparison of the actual power output with the Isentropic case. Typical Isentropic efficiencies range from 70-90%