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Water is the working fluid Water is the working fluid in a Rankine cycle with reheat Super heated steam leaves the boiler at 8 MPa and 480 °C The steam expand

Water is the working fluid Water is the working fluid in a Rankine cycle with reheat. Superheated steam leaves the boiler at 8 MPa and 480 °C. The steam expandsthrough the high pressure (firststage) turbine to 1 MPa and is then reheated to 440 °C. A saturated liquid exits the condenser at 6kPa. The isentropic efficiencies ofthe high- and low-pressure turbines are 83% and 85%, respectively. The isentropic efficiency of the pump is 87%. Manually calculate the:
a. Heat added in the boiler (kJ/kg)
b. Heat added during reheat (kJ/kg) Ans. 446.6 kJ/kg
c. Net work of the cycle (kJ/kg)
d. Quality of the steam at the condenser inlet Ans. 96.8%
e. Thermal efficiency of the cycle Ans. 35.68%

Apr 27 2020 View more View Less

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