KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Process Control)-ch01

KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Process Control)-ch01

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Unformatted text preview: 1 Chapter 1 2 Chapter 1 Chapter 1 3 Chapter 1 Chapter 1 4 Chapter 1 Process Dynamics a) Refers to unsteady-state or transient behavior. b) Steady-state vs. unsteady-state behavior i. Steady state : variables do not change with time ii. But on what scale? cf., noisy measurement c) ChE curriculum emphasizes steady-state or equilibrium situations: i. Examples: ChE 201, 304, 306... d) Continuous processes : Examples of transient behavior: i. Start up & shutdown ii. Grade changes iii.Major disturbance: e.g., refinery during stormy or hurricane conditions iv. Equipment or instrument failure (e.g., pump failure) 5 Chapter 1 a) Batch processes i. Inherently unsteady-state operation ii. Example: Batch reactor 1. Composition changes with time 2. Other variables such as temperature could be constant. 6 Chapter 1 Process Control a) Large scale, continuous processes: i. Oil refinery, ethylene plant, pulp mill ii. Typically, 1000 5000 process variables are measured....
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KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Process Control)-ch01

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