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600 °C Boiler 10 MPa Turbine W, 1.5 MPa 300 °C 10 MPa Feedwater X = 0.95 heater 20 kPa 1.5 MPa 40 °C 1.5 MPa 20 kPa Pump Pump Condenser JT = 25 °C 40 °C Cooling water

600 °C Boiler 10 MPa Turbine W, 1.5 MPa 300 °C 10 MPa Feedwater X = 0.95 heater 20 kPa 1.5 MPa 40 °C 1.5 MPa 20 kPa Pump Pump Condenser JT = 25 °C 40 °C Cooling water

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A feed water heater is used to preheat water before it enters a boiler, as shown schematically
in Figure Q1. A mass flux of 30 kg/s flows through the system and, 7 kg/s is withdrawn
from the turbine for the feed water heater. Neglecting losses through the various pipes and
components determine
(a) the feed water heater outlet temperature,
(b) the boiler heat transfer rate,
(c) the turbine power output,
(d) the total pump power required,
(e) the energy rejected by the condenser,
(f) the cooling water mass flux, and
(g) the thermal efficiency of the cycle.

1. A feed water heater is used to preheat water before it enters a boiler, as shown schematically in Figure Q1. A mass flux of 30 kg/s flows through the system and, 7 kg/s is withdrawn from the turbine for the feed water heater. Neglecting losses through the various pipes and components determine (a) the feed water heater outlet temperature, (b) the boiler heat transfer rate, (c) the turbine power output, (d) the total pump power required, (e) the energy rejected by the condenser, (f) the cooling water mass flux, and (g) the thermal efficiency of the cycle. 600 °C Boiler 10 MPа Turbine W. 1.5 MPa 300 °C 10 MPa Feedwater x = 0.95 20 kPa heater 1.5 MPa 40 °C 1.5 MPa 20 kPa Pump Pump Condenser JT = 25 °C 40 °C Cooling water Figure Q1
Transcribed Image Text:1. A feed water heater is used to preheat water before it enters a boiler, as shown schematically in Figure Q1. A mass flux of 30 kg/s flows through the system and, 7 kg/s is withdrawn from the turbine for the feed water heater. Neglecting losses through the various pipes and components determine (a) the feed water heater outlet temperature, (b) the boiler heat transfer rate, (c) the turbine power output, (d) the total pump power required, (e) the energy rejected by the condenser, (f) the cooling water mass flux, and (g) the thermal efficiency of the cycle. 600 °C Boiler 10 MPа Turbine W. 1.5 MPa 300 °C 10 MPa Feedwater x = 0.95 20 kPa heater 1.5 MPa 40 °C 1.5 MPa 20 kPa Pump Pump Condenser JT = 25 °C 40 °C Cooling water Figure Q1
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