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Teach Yourself the Basics of Aspen Plus, 2nd Edition

ISBN: 978-1-118-98059-0
280 pages
September 2016
Teach Yourself the Basics of Aspen Plus, 2nd Edition (111898059X) cover image

Description

The complete step-by-step guide to mastering the basics of Aspen Plus software

Used for a wide variety of important scientific tasks, Aspen Plus software is a modeling tool used for conceptual design, optimization, and performance monitoring of chemical processes. After more than twenty years, it remains one of the most popular and powerful chemical engineering programs used both industrially and academically.

Teach Yourself the Basics of Aspen Plus, Second Edition continues to deliver important fundamentals on using Aspen Plus software. The new edition focuses on the newest version of Aspen Plus and covers the newest functionalities. Lecture-style chapters set the tone for maximizing the learning experience by presenting material in a manner that emulates an actual workshop classroom environment. Important points are emphasized through encouragement of hands-on learning techniques that direct learners toward achievement in creating effective designs fluidly and with confidence. Teach Yourself the Basics of Aspen Plus, Second Edition includes:

  • Examples embedded within the text to focus the reader on specific aspects of the material being covered
  • Workshops at the end of each chapter that provide opportunities to test the reader's knowledge in that chapter's subject matter
  • Functionalities covered in the newest version of Aspen including the solution of a flowsheet by an equation oriented, EO approach, and the solution of problems which involve electrolyte equilibria
  • Aspen Plus executable format as well as .txt format files containing details of the examples and the workshops as well as their solutions are provided as a download

Designed with both students and professionals in mind, Teach Yourself the Basics of Aspen Plus, Second Edition is like having a personal professor 24/7. Its revolutionary format is an exciting way to learn how to operate this highly sophisticated software—and a surefire way for readers to get the results they expect.

Ralph Schefflan has been an adjunct professor at Stevens Institute of Technology for the past thirty-five years. He has taught four graduate courses, thermodynamics, process simulation, numerical methods, and equilibrium stage operations during his time there as well as being SIT's representative to Aspen Technology. Dr. Schefflan introduced process simulation at SIT evolving from Flowtran to Aspen Plus and taught it for thirty years.

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Table of Contents

PREFACE TO THE SECOND EDITION xiii

PREFACE TO THE FIRST EDITION xv

ACKNOWLEDGMENTS xix

ABOUT THE COMPANION WEBSITE xxi

1 INTRODUCTION TO ASPEN PLUS 1

1.1 Basic Ideas / 1

1.2 Starting Aspen Plus / 4

1.3 The Next Function / 6

1.4 The Navigation Pane / 6

1.5 The Property Environment / 8

1.6 Properties for Simulation / 11

1.7 The Simulation Environment / 13

1.8 Simulation Options / 13

1.9 Units / 14

1.10 Streams / 15

1.11 Blocks / 16

1.12 The Object Manager / 17

1.13 Model Execution / 17

1.14 Viewing Results / 18

1.15 Plotting Results / 20

References / 20

2 PROPERTIES 21

2.1 Introduction / 21

2.2 The Pure Component Databanks / 22

2.3 Property Analysis / 25

2.4 Property Estimation / 29

2.5 Workshops / 32

2.6 Workshop Notes / 33

References / 34

3 THE SIMPLE BLOCKS 35

3.1 Introduction / 35

3.2 Mixer/Splitter Blocks / 35

3.3 The Simple Separator Blocks / 37

3.4 Some Manipulator Blocks / 40

3.5 Workshops / 43

3.6 Workshop Notes / 44

4 PROCESSES WITH RECYCLE 47

4.1 Introduction / 47

4.2 Blocks with Recycle / 48

4.3 Heuristics / 51

4.4 Workshops / 51

4.5 Workshop Notes / 55

References / 56

5 FLOWSHEETING AND MODEL ANALYSIS TOOLS 57

5.1 Introduction / 57

5.2 Introduction to Fortran in Aspen Plus / 58

5.3 Basic Interpreted Fortran Capabilities / 58

5.4 The Sensitivity Function / 61

5.5 The Design Specification / 63

5.6 The Calculator Function / 65

5.7 The Transfer Function / 68

5.8 Workshops / 69

5.9 Workshop Notes / 71

References / 71

6 THE DATA REGRESSION SYSTEM (DRS) 73

6.1 Introduction / 73

6.2 Parameters of Equations of State / 74

6.3 Parameters of Activity Coefficient Equations / 76

6.4 Basic Ideas of Regression / 78

6.5 The Mathematics of Regression / 80

6.6 Practical Aspects of Regression of VLE or LLE Data / 82

6.7 VLE and LLE Data Sources / 90

6.8 Workshops / 93

6.9 Workshop Notes / 95

References / 96

7 FLASHES AND DECANTER 99

7.1 Introduction / 99

7.2 The Flash2 Block / 99

7.3 The Flash3 Block / 104

7.4 The Decanter Block / 105

7.5 Workshops / 107

7.6 Workshop Notes / 108

References / 109

8 PRESSURE CHANGERS 111

8.1 Introduction / 111

8.2 The Pump Block / 111

8.3 The Compr Block / 112

8.4 The MCompr Block / 113

8.5 Pipelines and Fittings / 114

8.6 Workshops / 115

8.7 Workshop Notes / 116

References / 116

9 HEAT EXCHANGERS 117

9.1 Introduction / 117

9.2 The Heater Block / 118

9.3 The Heatx Block / 122

9.4 The Mheatx Block / 126

9.5 Workshops / 127

9.6 Workshop Notes / 128

References / 129

10 REACTORS 131

10.1 Introduction / 131

10.2 The RStoic Block / 132

10.3 The RYield Block / 133

10.4 The REquil Block / 135

10.5 The RGibbs Block / 136

10.6 Reactions for the Rigorous Models / 138

10.7 The RCSTR Block / 143

10.8 The RPlug Block / 143

10.9 The RBatch Block / 145

10.10 Workshops / 148

10.11 Workshop Notes / 150

References / 151

11 MULTISTAGE EQUILIBRIUM SEPARATORS 153

11.1 Introduction / 153

11.2 The Basic Equations / 153

11.3 The Design Problem / 156

11.4 A Three-Product Distillation Example / 160

11.5 Preliminary Design and Rating Models / 162

11.6 Rigorous Models / 165

11.7 BatchSep / 174

11.8 Workshops / 178

11.9 Workshop Notes / 179

References / 181

12 PROCESS FLOWSHEET DEVELOPMENT 183

12.1 Introduction / 183

12.2 Heuristics / 184

12.3 An Example –The Production of Styrene / 184

12.4 A Model with Basic Blocks / 185

12.5 Properties / 185

12.6 Rigorous Flash and Decanter / 187

12.7 Analyzing the Rigorous Distillation / 188

12.8 Integrating the Rigorous Distillation into the Flowsheet / 189

12.9 The Reactor Feed / 192

12.10 Miscellaneous Considerations / 192

12.11 Workshops / 192

12.12 Workshop Notes / 195

Reference / 196

13 OPTIMIZATION 197

13.1 Introduction / 197

13.2 An Optimization Example / 198

13.3 Workshops / 202

13.4 Workshop Notes / 203

References / 205

14 COMPLEX EQUILIBRIUM STAGE SEPARATIONS 207

14.1 Introduction / 207

14.2 Energy Integration Applications / 208

14.3 Homogeneous Azeotropic Distillation / 210

14.4 Extractive Distillation / 211

14.5 Heterogeneous Operations / 214

14.6 Workshops / 215

14.7 Workshop Notes / 217

References / 219

15 EQUATION-ORIENTED SIMULATION 221

15.1 Introduction / 221

15.2 Identification of Variables / 222

15.3 Equations for EO Simulation / 223

15.4 Solving the EO Equations / 225

15.5 Comparing Calculated Variables in SM and EO Simulation / 227

15.6 Synchronization of the Equations / 228

15.7 The Equation Oriented Menu / 229

15.8 Solution of an EO Problem / 230

15.9 Reinitialization / 232

15.10 A Design Specification / 233

15.11 An SM Problem That is Difficult to Converge / 234

15.12 Sensitivity Analysis / 235

15.13 Equation-Oriented Optimization / 235

15.14 Workshops / 238

15.15 Workshop Notes / 241

References / 241

16 ELECTROLYTES 243

16.1 Introduction / 243

16.2 Electrolyte Solution Equilibria / 243

16.3 Electrolyte Solution Equilibria and the Electrolyte Wizard / 244

16.4 Electrolyte Equilibrium/Phase Equilibrium Examples / 248

References / 250

17 BEYOND THE BASICS OF ASPEN PLUS 251

INDEX 253

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