December 2002
Intermediate to advanced
800 pages
18h 7m
English
Consider a surge vessel that has a diameter of 1 m, and a maximum height of 2 m, with low- and high-level alarms set at 20% and 80%. Also, assume that the height setpoint is 1 meter, and the steady-state flow rate is 0.5 m3/min. The constant cross-sectional area is then 0.785 m2. Since the steady-state flow rate is 0.5 m3/min, assume that the inlet flow rate can vary between 0 and 1 m3/min.
You should show that the process and load disturbance transfer functions are
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Since the physical variable minimum and maximum alarm heights are 0.4 and 1.6 m, respectively, in terms of deviation variables, the minimum and maximum heights ...
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