[Luyben] Process Mod.. - Student subdomain for University of Bath

More documents

Recommendations

Info

. PREFACE The first edition of this book appeared over fifteen years ago. It was the first chemical engineering textbook to combine modeling, simulation, and control. It also was the first chemical engineering book to present sampled-data control. This choice of subjects proved to be popular with both students and teachers and of considerable practical utility. During the ten-year period following publication, I resisted suggestions from the publisher to produce a second edition because I felt there were really very few useful new developments in the field. The control hardware had changed drastically, but the basic concepts and strategies of process control had undergone little change. Most of the new books that have appeared during the last fifteen years are very similar in their scope and content to the first edition. Basic classical control is still the major subject. However, in the last five years, a number of new and useful techniques have been developed. This is particularly true in the area of multivariable control. Therefore I feel it is time for a second edition. In the area of process control, new methods of analysis and synthesis of control systems have been developed and need to be added to the process control engineer’s bag of practical methods. The driving force for much of this development was the drastic increase in energy costs in the 1970s. This led to major redesigns of many new and old processes, using energy integration and more complex processing schemes. The resulting plants are more interconnected. This increases control loop interactions and expands the dimension of control problems. There are many important processes in which three, four, or even more control loops interact. As a result, there has been a lot of research activity in multivariable control, both in academia and in industry. Some practical, useful tools have been developed to design control systems for these multivariable processes. The second edition includes a fairly comprehensive discussion of what I feel are the useful techniques for controlling multivariable processes. xxi
. Xxii PREFACE Another significant change over the last decade has been the dramatic increase in the computational power readily available to engineers. Most calculations can be performed on personal computers that have computational horsepower equal to that provided only by mainframes a few years ago. This means that engineers can now routinely use more rigorous methods of analysis and synthesis. The second edition includes more computer programs. All are suitable for execution on a personal computer. In the area of mathematical modeling, there has been only minor progress. We still are able to describe the dynamics of most systems adequately for engineering purposes. The trade-off between model rigor and computational effort has shifted toward more precise models due to the increase in computational power noted above. The second edition includes several more examples of models that are more rigorous. In the area of simulation, the analog computer has almost completely disappeared. Therefore, analog simulation has been deleted from this edition. Many new digital integration algorithms have been developed, particularly for handling large numbers of “stiff” ordinary differential equations. Computer programming is now routinely taught at the high school level. The-second edition includes an expanded treatment of iterative convergence methods and- of numerical integration algorithms for ordinary differential equations, including both explicit and implicit methods. The second edition presents some of the material in a slightly different sequence. Fifteen additional years of teaching experience have convinced me that it is easier for the students to understand the time, Laplace, and frequency techniques if both the dynamics and the control are presented together for each domain. Therefore, openloop dynamics and closedloop control are both discussed in the time domain, then in the Laplace domain, and finally in the frequency domain. The z domain is discussed in Part VII. There has been a modest increase in the number of examples presented in the book. The number of problems has been greatly increased. Fifteen years of quizzes have yielded almost 100 new problems. The new material presented in the second edition has come from many sources. I would like to express my thanks for the many useful comments and suggestions provided by colleagues who reviewed this text during the course of its development, especially to Daniel H. Chen, Lamar University; T. S. Jiang, University of Illinois-Chicago; Richard Kerrnode, University of Kentucky; Steve Melsheimer, Cignson University; James Peterson, Washington State University; and R. Russell Rhinehart, Texas Tech University. Many stimulating and useful discussions of multivariable control with Bjorn Tyreus of DuPont and Christos Georgakis of Lehigh University have contributed significantly. The efforts and suggestions of many students are gratefully acknowledged. The “ LACEY” group (Luyben, Alatiqi, Chiang, Elaahi, and Yu) developed and evaluated much of the new material on multivariable control discussed in Part VI. Carol Biuckie helped in the typing of the final manuscript. Lehigh undergraduate and graduate classes have contributed to the book for over twenty years by their questions,
Page 1 and 2: I WILLIAM WIlllAM 1. LUYBEN PROCESS
Page 3 and 4: The Series Bailey and OUii: Biochem
Page 5 and 6: PROCESS MODELING, SIMULATION, AND C
Page 7 and 8: ABOUT THE AUTHOR William L. Luyben
Page 9 and 10: CONTENTS Preface Xxi 1 1.1 1.2 1.3
Page 11 and 12: CONTENTS .. . xlu 5.7 Batch Reactor
Page 13 and 14: CONTENTS xv 10.3 10.4 Performance S
Page 15 and 16: comwrs xvii 151.3 Transpose of a Ma
Page 17: CONTENTS Xix 20.4 Sampled-Data Cont
Page 21 and 22: PROCESS MODELING, SIMULATION, AND C
Page 23 and 24: 2 PROCESS MODELING, SIMULATION. AND
Page 25 and 26: 4 PROCESS MODELING, SIMULATION, AND
Page 27 and 28: 6 PROCESS MODELING. SIMULATION, AND
Page 29 and 30: 8 PROCESS MODELING, SIMULATION, AND
Page 31 and 32: 10 PROCESS MODELING, SIMULATION, AN
Page 33 and 34: 12 PROCESS MODELING, SIMULATION, AN
Page 35 and 36: CHAPTER 2 FUNDAMENTALS 2.1 INTRODUC
Page 37 and 38: FUNDAMENTALS 17 big, complex system
Page 39 and 40: FUNDAMENTALS 19 z=o I z + dz z=L FI
Page 41 and 42: FUNDAMENTALS 21 The minus sign come
Page 43 and 44: FUNDAMENTALS 23 Molar flow of A lea
Page 45 and 46: FUNDAMENTALS 25 For liquids the PP
Page 47 and 48: FUNDAMENTALS 27 Flow of energy (ent
Page 49 and 50: FUNDAMENTALS 29 The units of this f
Page 51 and 52: FUNDAMENTALS 31 FIGURE 2.9 Laminar
Page 53 and 54: FUNDAMENTALS 33 Then Eq. (2.48) bec
Page 55 and 56: FUNDAMENTALS 35 Wenzel in Chemical
Page 57 and 58: FUNDAMENTALS .37 This exponential t
Page 59 and 60: FUNDAMENTALS 39 a direction 0 = 45
Page 61 and 62: EXAMPLES OF MATHEMATICAL MODELS OF
Page 69 and 70:
EXAMPLES OF MATHEMATICAL MODELS OF
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
EXAMPLES OF MA~EMATICAL MODELS OF C
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
EXAMPLES OF MATHEMATICAL MODELS OE
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
88 COMPUTER SIMULATION Our discussi
Page 109 and 110:
90 COMPUTER SIMULATION lation packa
Page 111 and 112:
92 COMPUTER SIMULATION For this rea
Page 113 and 114:
94 COMPUTER SIMULATION TABLE 4.1 Ex
Page 115 and 116:
96 COMPUTER SIMULATION Clearly, the
Page 117 and 118:
98 COMPUTER SIMULATION TABLE 4.2 Ex
Page 119:
I()() COMPUTER SIMULATION Settingfl
Page 589 and 590:
ANALYSIS OF MULTNARIABLE SYSTEMS 57
Page 591 and 592:
ANALYSIS OF MULTIVARIABLE SYSTEMS 5
Page 593 and 594:
ANALYSIS OF MULTIYARIABLE SYSTEMS 5
Page 595 and 596:
Page 597 and 598:
Page 599 and 600:
FIGURE 16.5 Multivariable INA (- 1,
Page 601 and 602:
Page 603 and 604:
Page 605 and 606:
ANALYSIS OF MULTIYARIABLE SYSTEMS 5
Page 607 and 608:
Page 609 and 610:
Page 611 and 612:
Page 613 and 614:
DESIGN OF CONTROLLERS FOR MULTIVARI
Page 615 and 616:
Page 617 and 618:
Page 619 and 620:
Page 621 and 622:
Page 623 and 624:
Page 625 and 626:
DESIGN Ok CONTROLLERS FOR MULTIVARI
Page 627 and 628:
Page 629 and 630:
show all

[Luyben] Process Mod.. - Student subdomain for University of Bath

Create successful ePaper yourself

Delete template?

Save as template?