1) Consider an ideal Rankine cycle in which the steam at 8.0 MPa and 550C enters...

Transcribed Image Text:

1) Consider an ideal Rankine cycle in which the steam at 8.0 MPa and 550C enters the turbine and saturated liquid at 7.5 kPa leaves the condenser. The net power output of this cycle is 100 MW. Determine a. The power output of the turbine per unit mass of steam. b. The power input to the pump per unit mass of steam. c. The heat transfer rate in the boiler per unit mass of steam. d. The thermal efficiency of the cycle. e. The mass flow rate of the steam. f. The heat transfer rate from the steam in the condenser. g. The steam in the condenser is cooled by cooling water. Find the mass flow rate of the cooling water if it enters the condenser at 15C and exits at 25C. 6) Consider a Rankine cycle with one reheat cycle. Steam enters the high-pressure turbine at 10.0 MPa and 600C, and leaves at 4 MPa. It is then reheated at constant pressure and enters the low-pressure turbine at 500C. The condenser pressure is 15 kPa, and water leaves it at saturated liquid. The isentropic efficiencies of the turbine and pump are 0.85 and 0.9 respectively. Determine the thermal efficiency of this Rankine cycle. 1) Consider an ideal Rankine cycle in which the steam at 8.0 MPa and 550C enters the turbine and saturated liquid at 7.5 kPa leaves the condenser. The net power output of this cycle is 100 MW. Determine a. The power output of the turbine per unit mass of steam. b. The power input to the pump per unit mass of steam. c. The heat transfer rate in the boiler per unit mass of steam. d. The thermal efficiency of the cycle. e. The mass flow rate of the steam. f. The heat transfer rate from the steam in the condenser. g. The steam in the condenser is cooled by cooling water. Find the mass flow rate of the cooling water if it enters the condenser at 15C and exits at 25C. 6) Consider a Rankine cycle with one reheat cycle. Steam enters the high-pressure turbine at 10.0 MPa and 600C, and leaves at 4 MPa. It is then reheated at constant pressure and enters the low-pressure turbine at 500C. The condenser pressure is 15 kPa, and water leaves it at saturated liquid. The isentropic efficiencies of the turbine and pump are 0.85 and 0.9 respectively. Determine the thermal efficiency of this Rankine cycle.