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Instrument Engineers' Handbook, Vol. 2: Process Control and Optimization, 4th Edition 4th Edition
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Top Customer Reviews
The Chapters on Control Hardware cover in detail transmitters, controllers, control valves, regulators and other types of final control elements, PLCs, and other logic devices, human interfaces and displays, including the design of control rooms.
The Chapters on Control Theory and Control Strategies covers everything from control basics and PID controllers, to tuning methods, stability, process characteristics, process modeling and simulation, model-based control, genetic and other evolutionary algorithms, fuzzy logic programming, neural networks and other advance control strategies.
The Chapters on Control and Optimization of Unit Operations provide both in-depth of both the theory of operation and control, and practical implementation for the control of pumping, distillation, chemical reaction, heat transfer and many other.
While evaluating and reviewing such sophisticated topics about Process Control, this handbook also tries and succeeds to provide and reinforce the reader with the most useful tool for the Automation and Control Engineer: Common Sense. In order to emphasize the importance of Common Sense, the Author gives some practical recommendations that include the following ones:
- Before we can control a process, one must fully understand it.
- Being progressive is good, but being a guinea pig is not.Read more ›
My two-year Instrumentation students use this book as a primary reference for their studies in control algorithms and final control elements. The fact that my students (who are not being trained as engineers, but technicians) find this book of significant value to their learning is a testament to its writing quality. While some of the sections delve into mathematics well beyond my students' abilities (e.g. Differential equations, Laplace Transforms, Nyquist plots -- all subjects appropriate for readers at the engineering level), there is enough content within its 1500+ pages still accessible and relevant enough to their learning that I have used this as the primary text for my courses on control valves, PID, and process optimization.
One of the unique features of this volume is a chapter (number 8 in the third edition) found near the end of the book entitled "Process Control Systems." The subject of this chapter is the application of process control strategies to a varietry of common industrial processes (HVAC, boilers, chillers, compressors, heat exchangers, distillation columns, evaporators, pumps, chemical reactors, turbines, water treatment, etc.).Read more ›
Where the author is most familiar is with general control concepts, e.g., ratio control, split-range control, cascade control. Where he is less successful is where controls are applied. Currently, I am involved in a process involving crystallizers.
An experienced crystallizer engineer with 40 years experience glanced at this section and cried, "Posh." Then, again, he is a bit skeptical. Looking at it myself, I found a few generalities but still managed to create a workable control scheme with the help of some reference information from an AIChE course run by Wayne Genck and Tim Nordahl (my skeptic).
In the crystallizer section, chapter 8.18, he defines seven variables and three equations allowing for four degrees of freedom. This is a concept key to this reference. The seven variables include: temperature and flow of the feed; temperature and flow of the cooling or heating medium; level of supersaturation (critical variable in crystallization); ratio of mother liquor recycled; and removal/dissolution rate of fine crystals. Fines must be removed or re-dissolved in the solvent: the goal is large, inclusion-free crystals. Four degrees of freedom means that four loops should be used to control these variables. Any more than that and the process is over-constrained with the result that the loops will interfere with each other.
By working through the background information and with the help of Shinskey's "Process Control Systems," I was able to use Liptak's handbook to develop what should be a robust control system.
This handbook includes sections on PLCs, DCS - and integration with other systems, programming, valve hardware, fieldbus, sizing control valves, etc.Read more ›