370 likes | 550 Views
2. . Chapter 10. Economic Plant Operation. It is an economic reality that the plant operation over long periods of time must be profitable. Thus, the control objectives must be consistent with the economic objectives. Stable Plant Operation. The control system should facilitate smooth, stable plan
E N D
1. 1
2. 2
3. 3
4. 4 Control Strategies Multiloop Control:
Each output variable is controlled using a single input variable.
5. 5 10.2 THE INFLUENCE OF PROCESS DESIGN ON PROCESS CONTROL Traditionally, process design and control system design have been separate engineering activities.
Thus in the traditional approach, control system design is not initiated until after the plant design is well underway and major pieces of equipment may even have been ordered.
This approach has serious limitations because the plant design determines the process dynamic characteristics, as well as the operability of the plant.
In extreme situations, the plant may be uncontrollable even though the process design appears satisfactory from a steady-state point of view.
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37