1. A Rankine Power Cycle has a condenser pressure of 1.228 kPa, boiler pressure of 14 MPa, and maximum temperature of 700°C. If needed, water at 10 kPa can be extracted from between two turbine stages. a) Calculate the thermal efficiency of the basic cycle.

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1. A Rankine Power Cycle has a condenser pressure of 1.228 kPa, boiler pressure of 14 MPa, and maximum
temperature of 700°C. If needed, water at 10 kPa can be extracted from between two turbine stages.
a) Calculate the thermal efficiency of the basic cycle.
b) Calculate the thermal efficiency if water is extracted from the turbines to use for regeneration in an open
feedwater heater. The water exits the OFH as saturated liquid.
c) Calculate the EUF if 20% of the total mass flowrate is extracted to use for process heating (cogeneration). At the
end of the process, saturated water is pumped up to the boiler pressure before entering the OFH.
d) Calculate the EUF if 20% of the total mass flowrate is extracted to use for process heating (cogeneration). At the
end of the process, saturated water enters the OFH before being pumped up to the boiler pressure.
Transcribed Image Text:1. A Rankine Power Cycle has a condenser pressure of 1.228 kPa, boiler pressure of 14 MPa, and maximum temperature of 700°C. If needed, water at 10 kPa can be extracted from between two turbine stages. a) Calculate the thermal efficiency of the basic cycle. b) Calculate the thermal efficiency if water is extracted from the turbines to use for regeneration in an open feedwater heater. The water exits the OFH as saturated liquid. c) Calculate the EUF if 20% of the total mass flowrate is extracted to use for process heating (cogeneration). At the end of the process, saturated water is pumped up to the boiler pressure before entering the OFH. d) Calculate the EUF if 20% of the total mass flowrate is extracted to use for process heating (cogeneration). At the end of the process, saturated water enters the OFH before being pumped up to the boiler pressure.
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