2- A cogeneration plant is to generate power and 8600 kJ/s of process heat. Consider an ideal cogeneration steam plant. Steam enters the turbine from the boiler at 7 MPa and 500°C. One-fourth of the steam is extracted from the turbine at 600-kPa pressure for process heating. The remainder of the steam continues to expand and exhausts to the condenser at 10 kPa. The steam extracted for the process heater is condensed in the heater and mixed with the feedwater at 600 kPa. The mixture is pumped to the boiler pressure of 7 MPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the mass flow rate of steam that must be supplied by the boiler, (b) the net power produced by the plant, and (c) the utilization factor. Answers: (a) 16.35 kg/s, (b) 17919 kW, (b) 52.4% Turbine Boiler Process heater (Condenser PII

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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2- A cogeneration plant is to generate power and 8600 kJ/s of process heat.
Consider an ideal cogeneration steam plant. Steam enters the turbine from
the boiler at 7 MPa and 500°C. One-fourth of the steam is extracted from the
turbine at 600-kPa pressure for process heating. The remainder of the steam
continues to expand and exhausts to the condenser at 10 kPa. The steam
extracted for the process heater is condensed in the heater and mixed with
the feedwater at 600 kPa. The mixture is pumped to the boiler pressure of 7
MPa. Show the cycle on a T-s diagram with respect to saturation lines, and
determine (a) the mass flow rate of steam that must be supplied by the
boiler, (b) the net power produced by the plant, and (c) the utilization factor.
Answers: (a) 16.35 kg/s, (b) 17919 kW, (b) 52.4%
Turbine
Boiler
Process
heater
Condenser
PII
PI
Transcribed Image Text:2- A cogeneration plant is to generate power and 8600 kJ/s of process heat. Consider an ideal cogeneration steam plant. Steam enters the turbine from the boiler at 7 MPa and 500°C. One-fourth of the steam is extracted from the turbine at 600-kPa pressure for process heating. The remainder of the steam continues to expand and exhausts to the condenser at 10 kPa. The steam extracted for the process heater is condensed in the heater and mixed with the feedwater at 600 kPa. The mixture is pumped to the boiler pressure of 7 MPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the mass flow rate of steam that must be supplied by the boiler, (b) the net power produced by the plant, and (c) the utilization factor. Answers: (a) 16.35 kg/s, (b) 17919 kW, (b) 52.4% Turbine Boiler Process heater Condenser PII PI
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