WPS 360 lect 1 slides

# WPS 360 lect 1 - Modeling and Simulation Physical Models Mathematical Models General Material Balance Model for a Press PHYSICAL PRINCIPLE

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Modeling and Simulation Physical Models Mathematical Models

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General Material Balance Model for a Press EQUATIONS REPRESENTING PHYSICAL PRINCIPLE (MATHEMATICAL MODEL) GENERAL PRESS MODEL EQUATIONS DESCRIBING EQUIPMENT (MATHEMATICAL MODEL) PHYSICAL PRINCIPLE CONSERVATION OF MASS F1 = F2 + F3 P1 = P2 + P3 EXIT CONSISTENCY = F(NIP PRESSURE) CONSISTENCY = P/(F + P) DEFINITIONS
Modular Mass & Energy Balances Pulp and paper processes are broken into small pieces (unit operations) Pieces can be easily connected to represent alternative flowsheets Mill model consists of many small unit operations models connected and managed by an executive

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Advantages of Modularity No computer programming required by user Flexibility Separates equations (models) from numerical values (input data) so that same model can be used many times in the a simulation
Overview of Simulation Process Define the problem clearly Select level of detail and components to be tracked Collect data and a current flowsheet

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## This note was uploaded on 08/22/2011 for the course WPS 417 taught by Professor Kirkman during the Spring '11 term at N.C. State.

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WPS 360 lect 1 - Modeling and Simulation Physical Models Mathematical Models General Material Balance Model for a Press PHYSICAL PRINCIPLE

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