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Modelling and Simulation 6. Februar 2008 / Dr. Ing Naveed Ramzan #

Instrumentation and Process Control

Department of Chemical Engineering, U.E.T. Lahore PakistanDepartment of Chemical Engineering, U.E.T. Lahore Pakistan

Dr.Ing. Naveed Ramzan

Lecture 1: Introduction to Process Control
http://www.pdfcomplete.com/cms/hppl/tabid/108/Default.aspx?r=q8b3uige22http://www.pdfcomplete.com/cms/hppl/tabid/108/Default.aspx?r=q8b3uige22


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6. Februar 2008 / Dr. Ing Naveed Ramzan #

Course Books


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Tentative Schedule


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Introduction to Process Control


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What does a feedback system do?


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Basic Concept feedback system


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Examples of feedback system


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Why is Control Necessary?

vSuppressing the influence of external disturbances

vEnsuring the stability of a chemical process

vOptimizing the performance of a chemical process

Incentives for Chemical Process Control


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Disturbances?


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vOptimizing the performance of a chemical process



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http://www.pdfcomplete.com/cms/hppl/tabid/108/Default.aspx?r=q8b3uige22


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Lecture 2: Design Aspects of a Process Control System


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Classification of Variables in a Chemical Process


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Example

Classification of Variables in a Chemical Process


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Design Elements of a Control System
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Primary Measurements


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Secondary Measurements

Unmeasured output=(Secondary measurements)


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Direct Measurements of external disturbances


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A control configuration is the informationstructure that is used to connect the availablemeasurements to the available manipulatedvariables.


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Same information flows to differentmanipulated variables


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Same manipulated variables but differentmeasurements


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General Control Configurations

Feedback control configuration Feedforward control configuration


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Inferential control configuration


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--- Single input , Single output (SISO)

--- Multiple input , Multiple output (MIMO)


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--- Proportional Control

--- Integral Control

--- Proportional Integral Control


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Hardware for a process Control System

--- Chemical Process

--- Measurement Instruments or sensors

--- Transducers

--- Transmission lines

--- The Controller

--- The Final Control Element

--- Recording Elements


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Hardware for a process Control System


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Lecture 3: Dynamic behaviour of first order system

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