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Get Full Access to Process Dynamics And Control - 3 Edition - Chapter 14 - Problem 14.28
Get Full Access to Process Dynamics And Control - 3 Edition - Chapter 14 - Problem 14.28

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# The dynamic behavior of the heat exchanger shown in Fig.

ISBN: 9780470128671 148

## Solution for problem 14.28 Chapter 14

Process Dynamics and Control | 3rd Edition

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Problem 14.28

The dynamic behavior of the heat exchanger shown in Fig. E14.28 can be described by the following transfer functions (H. S. Wilson and L. M. Zoss, ISA J., 9, 59 (1962)): Process: T' 2 F/lb min w; (0.432s+l)(0.017s+l) Control valve: X' 0.047 in/psi P' 0.083s+l Temperature sensor-transmitter: P' 0.12 psi/F T' 0.024s+ 1 W' _s=ll2~ X' mmm The valve lift x is measured in inches. Other symbols are defined in Fig. E14.27. (a) Find the Ziegler-Nichols settings for a PI controller. (b) Calculate the corresponding gain and phase margins.

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