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Dyn 002h Pfr
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Transcript of Dyn 002h Pfr
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2012 Aspen Technology, Inc. All rights reserved
Revised: Nov 27, 2012
Dynamic Analysis of a PFRwith Aspen HYSYS V8.0
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Objectives
Understand the basic workflow to a create a dynamicsimulation in Aspen HYSYS Dynamics.
Set up a simple dynamics simulation of a PFR andobserve effects of perturbations of controller settings.
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Background
Dynamic simulation is an extension of steady-state processsimulation whereby time-dependence is built into themodels.
Aspects of dynamic simulation not found in steady-stateinclude start up and shut down, holdup, changing reactionconditions, and thermal changes.
Reacting Acetic Acid and Enthanol produces Ethyl Acetate in
the following reaction:CH3COOH + CH3CH2OH CH3COOCH2CH3 + H2O
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Key Teaching Points
Heat flow can be used to control and alter a reaction.
Control valves must be sized properly to handle the rangeof values they need to cover.
The Dynamics Assistant provides an overview ofmodifications that need to be made to convert a steady-state simulation to dynamic. The recommended changes are not always necessary nor helpful.
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Problem Statement
Provided file PFR Reactor
Reaction activation energy E=5000 cal/mol
Pressure drop=0.1 bar
Dynamic Sequence Run simulation for 1 hour at 10C
Ramp feed from 10 to 60 C over the course of 1 hour
Continue simulation for 1 hour Ramp temperature down from 60 to 10 over 1 hour
Continue run for 1 additional hour
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Copyright
Copyright 2012 by Aspen Technology, Inc. (AspenTech). Allrights reserved. This work may not be reproduced or distributedin any form or by any means without the prior written consent ofAspenTech. ASPENTECH MAKES NO WARRANTY ORREPRESENTATION, EITHER EXPRESSED OR IMPLIED, WITHRESPECT TO THIS WORK and assumes no liability for any errors or
omissions. In no event will AspenTech be liable to you fordamages, including any loss of profits, lost savings, or otherincidental or consequential damages arising out of the use of theinformation contained in, or the digital files supplied with or foruse with, this work. This work and its contents are provided foreducational purposes only.
AspenTech, aspenONE, and the Aspen leaf logo, aretrademarks of Aspen Technology, Inc.. Brands and product namesmentioned in this documentation are trademarks or service marksof their respective companies.
