The diagram below shows a CSTR with its corresponding identified model between the concentration in the effluent, CA, and the valve % open on the supply stream of A. An online analyzer is to be installed that will have a sampling rate of t = 1 min. Kp = -0.8 s/CA = tS + 1 Fs F, CA = 0.8 mol Kp = % open T = 5 min, 9 = 1 min FA CSTR
a) (5 pts.) Draw the feedback control loop on the diagram, including representations for all of the elements of the loop.
b) (15 pts.) Suggest PID tuning for the closed-loop system.
c) (10 pts.) Give reasoning why or why not continuous control would be appropriate for this case as compared to other approaches to control (no control, manual control, on-off control, emergency control).