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Theory and Application of the Lang-Gilles Observer for Distillation Processes / Titelei/Inhaltsverzeichnis
Theory and Application of the Lang-Gilles Observer for Distillation Processes / Titelei/Inhaltsverzeichnis
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I–XII
Titelei/Inhaltsverzeichnis
I–XII
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1–7
1 Introduction
1–7
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1.1 Distillation, distillation state observers and distillation control
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1.2 Scope of the thesis
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1.2.1 A distillation process for the separation of the mixture of acetone, chloroform, benzene and toluene
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1.2.2 Convergence of the Lang-Gilles observer
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1.2.3 Separation efficiency estimation in conjunction with the Lang-Gilles observer
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1.2.4 Model-predictive control in conjunction with the Lang-Gilles observer
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1.3 Structure of the thesis
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8–51
2 Dynamic distillation modeling
8–51
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2.1 Introduction
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2.2 Classification of distillation models
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2.2.1 Fundamental models
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2.2.2 Empirical models
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2.2.3 Hybrid models
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2.3 Distillation efficiency models
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2.3.1 Murphree point efficiency
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2.3.2 Murphree tray efficiency
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2.3.3 Multi-component Murphree tray efficiency
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2.3.4 Multi-component Murphree tray efficiency in parametric form
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2.4 Distillation column models for simulation and theoretical analysis
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2.4.1 Plant-replacement model
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2.4.2 Controller/Observer model
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2.4.3 Comparison of plant-replacement and controller/observer models
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2.4.4 Controller model in a compact form for theoretical analysis
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2.4.5 Determination of model parameters
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2.5 Dynamics and basic control of the ACBT process
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2.5.1 ACBT process dynamics at the nominal state
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2.5.2 Regulatory control of the ACBT process
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2.6 Chapter summary
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52–81
3 Analysis of the Lang-Gilles observer
52–81
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3.1 Introduction
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3.2 Lang-Gilles observer
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3.2.1 Problem statement and initial data
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3.2.2 Observer correction term
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3.2.3 Plant observer in a compact form for theoretical analysis
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3.3 Convergence analysis
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3.3.1 The state error equation
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3.3.2 Preliminary results
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3.3.3 Convergence results
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3.3.4 A tuning method for Lang-Gilles observer
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3.3.5 An effect of internal flows on the observer convergence time
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3.4 Chapter summary
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82–96
4 Efficiency estimation in distillation columns
82–96
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4.1 Introduction
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4.2 Sequential state and parameter estimation
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4.2.1 Estimation of the state variables
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4.2.2 Estimation of the Murphree efficiency matrix
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4.2.3 Periodic estimation of the Murphree efficiency matrix and observer states
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4.3 Case study: methanol-ethanol-water separation
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4.3.1 One single constant Cltrue
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4.3.2 One single drifting Cltrue
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4.3.3 Multiple drifting Cltrue
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4.4 Chapter summary
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97–118
5 Application of the Lang-Gilles observer in distillation control
97–118
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5.1 Introduction
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5.2 Plantwide control
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5.3 Control design
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5.3.1 Control problem statement
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5.3.2 Design of regulatory and supervisory controllers
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5.4 Case study: output feedback control of ACBT separation
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5.4.1 The PID regulatory layer is turned off (open-loop process)
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5.4.2 The PID regulatory layer is turned on
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5.4.3 The supervisory and regulatory control layers are turned on
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5.5 Chapter summary
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119–122
6 Summary and conclusions
119–122
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123–143
Appendix
123–143
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A Derivation of particular column assumptions
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A.1 Derivation of the constant enthalpy assumption
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A.2 Derivation of the constant molar overflow condition (CMO)
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A.3 Derivation of a simplified energy balance equation for condensers
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B Implementation of distillation libraries
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B.1 Modeling environment
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B.2 External software
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B.3 Implementational issues
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C Simulation data
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C.1 Parameters for prediction of activity coefficients and vapor pressures in ACBT mixture
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C.2 Parameters for prediction of activity coefficients and vapor pressures in MEW mixture
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C.3 Regulatory control parameters
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C.4 Supervisory control parameters
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C.5 Nominal design condition used in Section 3.3.5
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C.6 Nominal design condition used in Section 5.4
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D Auxiliary theorems
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144–157
Bibliography
144–157
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Theory and Application of the Lang-Gilles Observer for Distillation Processes , page I - XII
Titelei/Inhaltsverzeichnis
Autoren
Maxim Stuckert
DOI
doi.org/10.51202/9783186253088-I
ISBN print: 978-3-18-525308-9
ISBN online: 978-3-18-625308-8
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