Chapter 15

Plantwide Control

A process engineer is concerned about more than the control of a single loop or multiple loops associated with a single-unit operation. Of real concern is the operation of the entire plant. After studying this chapter, the reader should be able to

  • Develop an appreciation for some of the complexities of plantwide control.

  • Understand the control strategies associated with equipment/unit operations that are part of a typical chemical process plant.

  • Understand the “snowball effect” and how to fix a stream flow in the recycle loop to avoid it.

  • Understand that recycle can significantly change the process dynamics.

  • Understand the control and optimization hierarchy—that important operation and control decisions at different ...

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