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The figure below provides steady-state operating data for a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 1.5 MPa, 280°C, enters a two-stage turbine with a mass flow rate of m1 = 2 kg/s. A fraction of the total flow, y = 0.15, is extracted between the two stages at 0.2 MPa to provide for building heating, and the remainder expands through the second stage to the condenser pressure of 0.1 bar. Condensate returns from the campus buildings at 0.1 MPa, 60°C and passes through a trap into the condenser, where it is reunited with the main feedwater flow. Saturated liquid leaves the condenser at 0.1 ba

The figure below provides steady-state operating data for a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 1.5 MPa, 280°C, enters a two-stage turbine with a mass flow rate of m1 = 2 kg/s. A fraction of the total flow, y = 0.15, is extracted between the two stages at 0.2 MPa to provide for building heating, and the remainder expands through the second stage to the condenser pressure of 0.1 bar. Condensate returns from the campus buildings at 0.1 MPa, 60°C and passes through a trap into the condenser, where it is reunited with the main feedwater flow. Saturated liquid leaves the condenser at 0.1 ba

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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On my online homework, it says the answer for part b, 993.2 kW and part c, 360.06 are incorrect. I also need help with part d.

 

The figure below provides steady-state operating data for a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 1.5 MPa, 280°C, enters a two-stage turbine with a mass flow rate of m1 = 2 kg/s. A fraction of the total flow, y = 0.15, is extracted between the two stages at 0.2 MPa to provide for building heating, and the remainder expands through the second stage to the condenser pressure of 0.1 bar. Condensate returns from the campus buildings at 0.1 MPa, 60°C and passes through a trap into the condenser, where it is reunited with the main feedwater flow. Saturated liquid leaves the condenser at 0.1 bar.

 

Pi = 1.5 MPa T = 280°C Turbine Boiler Ja-» P2 = 0.2 MPa 1 – y) P3 =0.1 bar (1) Trap 7 Condenser P6 = 0.1 MPa T= 60°C Pump 5 P4 =P3 = 0.1 bar X4 =0 (saturated liquid)
Transcribed Image Text:Pi = 1.5 MPa T = 280°C Turbine Boiler Ja-» P2 = 0.2 MPa 1 – y) P3 =0.1 bar (1) Trap 7 Condenser P6 = 0.1 MPa T= 60°C Pump 5 P4 =P3 = 0.1 bar X4 =0 (saturated liquid)
State T (°C) h (kJ/kg) 1 1.5 MPa 280 2992 0.2 MPa sat 2652 3 0.1 bar sat 2280 4 0.1 bar sat 191.8 1.5 MPa 193.3 0.1 MPa 60 251.6 7 0.1 bar 251.6 Determine: (a) the rate of heat transfer to the working fluid passing through the boiler, in kW. (b) the net power developed, in kW. (c) the magnitude of the rate of heat transfer for building heating, in kW. (d) the magnitude of the rate of heat transfer to the cooling water passing through the condenser, in kW.
Transcribed Image Text:State T (°C) h (kJ/kg) 1 1.5 MPa 280 2992 0.2 MPa sat 2652 3 0.1 bar sat 2280 4 0.1 bar sat 191.8 1.5 MPa 193.3 0.1 MPa 60 251.6 7 0.1 bar 251.6 Determine: (a) the rate of heat transfer to the working fluid passing through the boiler, in kW. (b) the net power developed, in kW. (c) the magnitude of the rate of heat transfer for building heating, in kW. (d) the magnitude of the rate of heat transfer to the cooling water passing through the condenser, in kW.
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