5. A two-pass shell-and-tube heat exchanger cools a hot liquid process stream (120 to 140 C inlet temperature) to a desired temperature of 70 C using cooling water available at 20 C. The hot process stream is on the shell side of the heat exchanger, while the cooling water is on the tube side of the heat exchanger. Hot process fluid in Cooling water in Cooling water out Process fluid out a) Briefly (30 words or less) discuss the objectives of a suitable feedback control strategy for the process above. b) What is your proposed controlled variable (CV)? c) What is your proposed manipulated variable (MV)? d) What are possible disturbances (DV)? e) Draw your feedback control strategy onto the drawing above using typical symbols found on a P&ID diagram. f) Draw the control block diagram for your feedback process control loop, labeling all signals and blocks on the diagram.

Q2/A) The system is shown in the next page: 1. Find the value of (m) when the damping ratio () is (0.7). Then obtain the maximum over shoot, peak time, rise time, and settling time. 2. Determine (on) and (C) when (m) equal zero. 3. Calculate the value of steady state error for this system if the input is a unit ramp. X(s) 250 Y(s) S(S+10) 3m S + 1

F1 F2 A2 P2 The following is known: Area, A1= 0.3 ft and A2= 7.6 A1- Assuming an incompressible fluid If a force F1 of 44.3 lbf / ft2 is applied at (1) then the resultant force, F2 in Ibf is equal to -- ?

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