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Model of processes

Figure 1.6 The onion model of process design. A reactor design is needed before the separation ind recycle system can be designed, and so on. (From Smith and Linnhoff, Trans. IChemE, CkERD, 66 195, 1988 reproduced by permission of the Institution of Chemical Engineers.)... Figure 1.6 The onion model of process design. A reactor design is needed before the separation ind recycle system can be designed, and so on. (From Smith and Linnhoff, Trans. IChemE, CkERD, 66 195, 1988 reproduced by permission of the Institution of Chemical Engineers.)...
The computer effort required to get a solution to a simulation problem is important because, ia the cases of optimization of desiga and dynamic simulation for control, many simulator mns must be made. At times the models of process units are simplified and often linearized to speed up the convergence. [Pg.74]

NUREG/CR-3098, and NUREG/ CR-2635). MF7 draws on this experience for logical modeling of process plants. [Pg.120]

The key recognitive skill required to carry out the above tasks is the formation of a mental model of the process operations that fits the current facts about the process and enables the operators to correctly assess process behavior and predict the effects of possible control actions. Correct mental models of process operations have allowed operators to overcome the weakness of lost sensors and conflicting trends, even under the pressure of an emergency (Dvorak, 1987), whereas most of the operational mishandlings are due to an erroneous perception as to what is going on in the process (O Shima, 1983). [Pg.208]

In order to develop intelligent, computer-aided systems with systematic and sound methodologies for the automatic creation of mental models of process operations, we need to resolve the following two and interrelated issues ... [Pg.209]

How does one generate relationships among process trends in order to provide the desired mental model of process operations ... [Pg.209]

Multiscale modeling of process operations. The description of process variables at different scales of abstraction implies that one could create models at several scales of time in such a way that these models communicate with each other and thus are inherently consistent with each other. The development of multiscale models is extremely important and constitutes the pivotal issue that must be resolved before the long-sought integration of operational tasks (e.g., planning, scheduling, control) can be placed on a firm foundation. [Pg.267]

Figure 1.7 The onion model of process design. A reactor is needed before the separation and recycle system can be designed and so on. [Pg.9]

He has published over 200 papers in the fields of process control, optimization, and mathematical modeling of processes such as separations, combustion, and microelectronics processing. He is coauthor of Process Dynamics and Control, published by Wiley in 1989. Dr. Edgar was chairman of the CAST Division of AIChE in 1986, president of the CACHE Corporation from 1981 to 1984, and president of AIChE in 1997. [Pg.665]

Chapter 17 - Vapor-liquid equilibrium (VLE) data are important for designing and modeling of process equipments. Since it is not always possible to carry out experiments at all possible temperatures and pressures, generally thermodynamic models based on equations on state are used for estimation of VLE. In this paper, an alternate tool, i.e. the artificial neural network technique has been applied for estimation of VLE for the binary systems viz. tert-butanol+2-ethyl-l-hexanol and n-butanol+2-ethyl-l-hexanol. The temperature range in which these models are valid is 353.2-458.2K at atmospheric pressure. The average absolute deviation for the temperature output was in range 2-3.3% and for the activity coefficient was less than 0.009%. The results were then compared with experimental data. [Pg.15]

More than at mercury, it makes a difference whether the electrode is inert or not. In the first case, the electrode reaction is of the type Fe3+/ Fe2+ etc. and the modelling of processes is the same as with mercury. However, if the electrode reaction is of the type Zn2+/Zn, e.g. at a gold electrode, at least the electrode surface will be modified by the deposited zinc, Frequently, it is observed that the first monolayer of the foreign metal is deposited at a potential substantially positive to its standard potential. This phenomenon is named underpotential deposition and bears some resemblance to an electrode reaction that involves adsorption of the reacting species (see Sect. 6). [Pg.282]

Equations 3.71 and 3.72 can be further developed in terms of the self-diffusivity using the atomistic models for diffusion described in Chapters 7 and 8. The resulting formulation allows for simple kinetic models of processes such as dislocation climb, surface smoothing, and diffusional creep that include the operation of vacancy sources and sinks (see Eqs. 13.3, 14.48, and 16.31). [Pg.59]

L. Kantorovich, E. Kotomin, V. Kuzovkov, I. Tale, A. Shluger and Yu. Zakis, Models of Processes in Wide-Gap Solids with Defects (Zinatne, Riga, 1991). [Pg.169]

In our presentation, we concentrated on the modeling of subdiffusive phenomena—that is, modeling of processes whose mean squared displacement in the force-free limit follows the power-law dependence (x2 )) oc tK for 0 < k < 1. The extension of fractional dynamics to systems where the transport is subballistic but superdiffiisive, 1 < k < 2, is presently under discussion [77, 78], (compare also Ref. 117). [Pg.255]


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See also in sourсe #XX -- [ Pg.91 , Pg.92 , Pg.93 ]




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Appendix 2A Process Plant Example of the Stepladder Model

Application of Process Models

Basic modelling of extraction process

Characteristics of Data Processing for Industrial Process Modeling

Conceptual Model of Relevant Processes

Detailed Modeling of Single Batch Processes

Extended Analysis of Modeling for Process Operation

FINITE ELEMENT MODELLING OF POLYMERIC FLOW PROCESSES

Fundamentals of Mathematical Modeling, Simulation, and Process Control

Hierarchical Modeling of Processes and Operations

Hybrid Modelling of Dynamic Processes

Input-Output Models of Dynamic Processes

Mathematical Modeling of Dynamic Process Kinetics

Mathematical modeling of flow processes

Mathematical modelling of the hydration process

Model Predictive Control of Batch Processes (SHMPC)

Model System of CMT Process Computation

Model of human information processing

Model of the ALILE Process

Model of the Crystallization Process

Model of unit processes

Model-Predictive Control of Continuous Processes

Modeling of Granulation Processes

Modeling of Kinetic Processes

Modeling of Process Intensification. Edited by F. J. Keil

Modeling of Processes Involving Polymers for Pharmaceutical Applications

Modeling of Processes for Unsaturated Polyester Production

Modeling of Processes in Microreactors Based on General Balance Equation

Modeling of Processing Machines Using Elementary Steps

Modeling of Processing Systems

Modeling of SMB Processes

Modeling of chromatographic processe

Modeling of ozonation processes

Modeling of process systems with high energy throughput

Modeling of process systems with large recycle streams

Modeling of process systems with recycle and purge

Modeling of the Process

Modeling of the SMB process

Modeling of the mixing process

Modelling and analysis of the CRTM-1 process

Modelling of Stagewise Processes

Modelling simulation of chemical processes

Models of Continuous and Discrete Polystochastic Processes

Models of physicochemical processes

Molecular Modeling of Corrosion Processes: Scientific Development and Engineering Applications, First Edition

Neural Networks Used for Modeling of Processes Involving Pharmaceutical Polymers

Numerical Modeling of Multiphase Flows in Materials Processing

Operant Conditioning model of environmental processes and their effect on behavior

Phenomena-Based Modeling of Processing Systems

Physical Models of Elementary Processes, Transition Probabilities, and Kinetic Coefficients

Predictability of Process Models

Predictive Modeling of the Continuous Catalyst Regeneration (CCR) Reforming Process

Process Modelling and Simulation of Ink Jet Printing

Quantum Confinement and Models of the Luminescence Process

RANS based models of reactive flow processes

Stochastic modeling of physical processes

Structure of Reforming Process Model

Studies and Models of Fracture Processes in Graphite

Summary of the Model Building Process

The Fractal Models of Epoxy Polymers Curing Process

The Kinetic Modeling of Commercial Catalytic Processes

The Multifractal Model of Sorption Processes for Nanocomposites

Theoretical Modeling and Numerical Simulation of Spray Drying Processes

Thermal Modeling of Rotary Kiln Processes

Two Models of the Protein-Adsorption Processes

Types of model involving one or two processes

USE OF PRESS FOR MODEL STRUCTURE SELECTION IN PROCESS IDENTIFICATION

USE OF PRESS FOR PROCESS MODEL SELECTION

Verification of Model Parameters Prior to Process Simulation

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