Process Control HW 10 Help Session

1. Process Control HW 10 Help Session Kevin Siggard Tierra Duffield

2. 10.1 • Assumptions • Pressure drop is negligible (given in problem statement) • Constant Pressure and Temperature • Flow is incompressible • The density of the air is unaffected by the Chlorine concentration

3. 10.1

4. 10.1

5. 10.1

6. 10.1 • Would this be acceptable if this were a carbon monoxide leak? • NO • It takes a very short amount of time for an abundant supply of carbon monoxide to saturate the blood stream • ∴ 1.72 minutes is unacceptable and possibly deadly

7. 11.1 • See Fig. 11.8 for a standard block diagram • The only change that must be made to Fig. 11.8 is to add one more disturbance variable because the problem statement tells us to treat both the feed flow rate and the feed composition xf as disturbance variables

8. 11.1 (Fig. 11.8) D Gd Yd Ysp Gp Ysp U Yu Gv P E Y Km Gc Gm Ym

9. 11.1 (Fig. 11.8 adapted) Yd1 D1 Gd1 D2 Gd2 Yd2 Y Ysp Gp Ysp U Yu Gv P E Km Gc Gm Ym

10. 11.3. P only controller for a stirred-tank heater control systempart a)

11. 11.3 part b)

12. 11.3 part b)

13. 11.3 part c)

14. 11.3 part c)

15. Typo in 11.4 Apparently, there are typos in problem statement. Specifically use and

16. 11.4 part a) C ‘2 (s) Gd lb solute/ft^3 X1 Q’2(s) P’T(s) C’3sp(s) C’3(s) X2 C’3sp(s) Gv Gp G_IP E(s) Km Gc P’(s) ma ma psi ma Gal/min lb solute/ft^3 C’3m (s) Gm C’3 (s) lb solute/ft^3 ma

17. 11.4 part b)

18. 11.4 part b)

19. 11.4 part b)

20. 11.4 part b)

21. 11.4 part c) • The trick for deciding if the PI controller needs to be retuned is determining whether or not the suggested change affects the block transfer function. If the block transfer function changes, then you will need to retune.

22. 11.4 part c)

23. 11.5 part a)

24. 11.5 part b) and c)

25. 11.5 part d) and e) e) • The system is under damped so it will oscillate.

26. 11.7

27. 11.7

28. 11.7