9th Edition

ISBN: 9781259822674

Author: Yunus A. Cengel Dr., Michael A. Boles

Publisher: McGraw-Hill Education

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Chapter 10.9, Problem 76P

An ideal cogeneration steam plant is to generate power and 8600 kJ/s of process heat. 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.

Chapter 10.9, Problem 76P, An ideal cogeneration steam plant is to generate power and 8600 kJ/s of process heat. Steam enters

FIGURE P10–76

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Chapter 10.9, Problem 75P

Chapter 10.9, Problem 77P

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Chapter 10 Solutions

Thermodynamics: An Engineering Approach

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Solution Summary: The author explains the mass flow rate of the steam that must be supplied by the boiler.

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