Water is the working fluid in an ideal Rankine cycle with regeneration. All steam enters the...

 

Transcribed Image Text:

Water is the working fluid in an ideal Rankine cycle with regeneration. All steam enters the first turbine stage at 12 MPa, 520 \deg C and expands to 1 MPa where some of the steam is extracted and diverted to the open feedwater heat exchanger operating at 1 MPa. The remaining steam keeps expanding through the second turbine stage and exits at 6 kPa, then goes through a heat exchange to cool to saturated liquid water. After that, the pump increases the pressure back to 1 MPa. Then it goes to the feedwater heat exchanger. Satureated liquid water leaves the feedwater heat exchanger then pumped back to 12 MPa. Find: (1) Sketch the process on a I-s diagram. (2) Thermal efficiency. (3) Mass flow rate of the total steam if net power output is 330 MW. Water is the working fluid in an ideal Rankine cycle with regeneration. All steam enters the first turbine stage at 12 MPa, 520 \deg C and expands to 1 MPa where some of the steam is extracted and diverted to the open feedwater heat exchanger operating at 1 MPa. The remaining steam keeps expanding through the second turbine stage and exits at 6 kPa, then goes through a heat exchange to cool to saturated liquid water. After that, the pump increases the pressure back to 1 MPa. Then it goes to the feedwater heat exchanger. Satureated liquid water leaves the feedwater heat exchanger then pumped back to 12 MPa. Find: (1) Sketch the process on a I-s diagram. (2) Thermal efficiency. (3) Mass flow rate of the total steam if net power output is 330 MW.