A single-tank process has been operating for a long period of time with the inlet how rate
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A single-tank process has been operating for a long period of time with the inlet how rate q1 equal to 30.4 ft3/min. After the operator increases the flow rate suddenly by 10%, the liquid level in the tank changes as shown in Table E7.2.
Assuming that the process dynamics can be described by a first-order model, calculate the steady-state gain and the time constant using four methods;
(a) Prom the time required for the output to reach 63.2% of the total change.
(b) From the initial slope of the response curve.
(c) From the slope of the fraction incomplete response curve.
(d) Compare the three models by simulating their step responses.
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Related Book For
Process Dynamics And Control
ISBN: 978-0471000778
2nd Edition
Authors: Dale E. Seborg, Thomas F. Edgar, Duncan A. Mellich
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