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Suppose that the temperature in an exothermic continuous

Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg ISBN: 9780470128671 148

Solution for problem 9.3 Chapter 9

Process Dynamics and Control | 3rd Edition

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Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg

Process Dynamics and Control | 3rd Edition

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Problem 9.3

Suppose that the temperature in an exothermic continuous stirred-tank reactor is controlled by manipulating the coolant flow rate using a control valve. A PID controller is used and is well-tuned. Which of these changes could adversely affect the stability of the closed-loop system? Briefly justify your answers. (a) The span of the temperature transmitter is increased from 20 oc to 40 C. (b) The zero of the temperature transmitter is increased from 15 oc to 20 C. (c) The control valve trim is changed from linear to equal percentage. (d) The feed flow rate is doubled.

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Chapter 9, Problem 9.3 is Solved
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Textbook: Process Dynamics and Control
Edition: 3
Author: Dale E. Seborg
ISBN: 9780470128671

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Suppose that the temperature in an exothermic continuous