Build, Optimize and Control Dynamic Process Models using Aspen HYSYS® Dynamics

Course Id:  EHY223   |   Duration:  3.00 day(s)   |   CEUs Awarded:  2.1   |   Level:  Intermediate

Course Objective

  • Learn how to convert steady-state models into dynamic models to solve process design, plant operation and control problems using Aspen HYSYS Dynamics.
  • Analyze and determine the best control strategy to keep the plant operation at its best using different controller models and strip charts (plots).
  • Rigorously model valve characteristics and define actuator parameters to closely mimic a realistic flow behavior.
  • Dynamically model compressors using performance curves and account for anti-surge controllers to overcome the problems that arise when low flow to the compressor is likely to occur due to process disturbances.
  • Model distillation columns in dynamic mode and vent off excess vapor through pressure safety valves to protect the columns against overpressure scenarios.
  • Learn to automate dynamic models by defining actions to be executed either when a condition is met or when a specific simulation time is reached during the dynamic run in the Event Scheduler.

Course Overview

  • Develop the skills and techniques required for creating and running dynamic simulations. 
  • Build dynamic models of vessel relief scenarios, compressor surge control, distillation column control, and pipeline hydraulics. 
  • Develop distillation column control with detailed geometry using the Column Analysis tool. 
  • Apply the best practices for transitioning from steady-state to dynamic modeling and discover shortcuts for efficient use of HYSYS Dynamics.


  • Explore Dynamic models to introduce various real-life disturbances to a simulation and discover how different control strategies can mitigate these disturbances
  • Define dynamic specifications, create strip charts and configure various controllers in the process simulation
  • Automate actions within a HYSYS Dynamics simulation by using the Event Scheduler and Cause & Effect Matrix tools
  • Interactive sizing of distillation column using the Column Analysis tool to obtain detailed geometry for dynamic simulation
  • Learn pressure flow theory, column dynamics concepts, pipeline hydraulics, and basic process control theory


  • Engineers with Aspen HYSYS experience
  • Engineers with no or limited previous experience in dynamic simulation


  • Instruction on basic topics through presentation
  • Discussion about the general approach and the key elements for successful dynamic simulations
  • Instructor-guided demonstrations of features
  • Hands-on workshops
  • Detailed course notes


  • Familiarity with Aspen HYSYS steady-state modeling concepts and Aspen Simulation Workbook
  • Or previously attended EHY101 Introduction to Process Modeling using Aspen HYSYS and EHY121 Building MS Excel User Interfaces for Aspen HYSYS Simulations Using Aspen Simulation Workbook

Class Schedule

Class Agenda

EHY223: Build, Optimize and Control Dynamic Process Models using Aspen HYSYS® Dynamics

Transitioning from Steady-state to Dynamic Mode

  • Define dynamic pressure-flow specifications and enter equipment sizing data
  • Understand the solving strategy and degrees of freedom analysis in Aspen HYSYS Dynamics
  • Use the Dynamics Assistant tool to verify the preparedness of a simulation to be run in dynamic mode
  • Workshop: Convert a Steady-state Model into a Dynamic Model
Controllers and Strip Charts
  • Add and set up controllers in a dynamic model
  • Create strip charts to monitor key process variables
  • Workshop: Add controllers and Strip Charts
Dynamic Details
  • Configure a control valve with detailed operating characteristics and actuator parameters
  • Implement heat loss models for process vessels
  • Select nozzle locations and account for the hydrostatic head contribution in pressure drop calculations
  • Workshop: Dynamic Details
Expanding the Model
  • Add unit operations directly in dynamic mode
  • Initialize newly added unit operations in dynamic mode 
  • Develop appropriate control strategies using split range and on-off controllers 
  • Install a relief valve for vessel overpressure protection
  • Workshop: Expanding the Model in Dynamic mode
Compressor Curves and Surge Control
  • Robustly model compressors using performance curves
  • Model rotating equipment in dynamic mode
  • Implement surge control schemes for compressors
  • Workshop: Compressor Curves and Surge Control 
Dynamic Column Modeling
  • Convert a steady-state model containing distillation columns into a dynamic model
  • Use the Column Internals tool to enter column geometry data and have it ready to run in dynamic mode
  • Model an LPG distillation column in dynamic mode and implement an effective control strategy
  • Workshop: Dynamic Column Modeling 
Column Pressure Relief
  • Modify the condenser overhead structure of a distillation column to include rigorous heat transfer equipment
  • Develop model-building techniques and follow best practices by adding operations and controllers to the dynamic model
  • Install a relief valve to protect the column overhead system against pressurization / emergency scenarios
  • Workshop: Configure a Column Pressure Safety Valve
The Event Scheduler and Cause & Effect Matrix
  • Configure the Event Scheduler and Cause and Effect Matrix tools to automate an Aspen HYSYS Dynamics model
  • Perform customized calculations in dynamic mode with the Spreadsheet operation
  • Workshop: Fire Scenario with the Event Scheduler and Cause & Effect Matrix
User Variables and Linking Aspen Simulation Workbook to a Dynamic Simulation
  • Learn how to define User Variables in Aspen HYSYS Dynamics
  • Demonstrate the use of Aspen Simulation Workbook as a tool to link Aspen HYSYS Dynamics variables with Microsoft Excel
  • Use ASW Profile Tables to monitor process variables in Excel
  • Workshop: Create a Dynamic User Variable and Link Aspen Simulation Workbook to a Dynamic Model  
Pipeline Hydraulics
  • Explain the basics of multiphase flow modeling in pipelines
  • Review pipeline modeling options in Aspen HYSYS
  • Build Aspen Hydraulics as an option for steady-state and dynamic pipeline modeling
  • Workshop: Pipeline Hydraulics 
Activated Dynamic Compressor Surge
  • Set up a compressor to perform dynamic surge analyses.
  • Perform dynamic runs by only fully defining a compressor model in steady-state (skipping the necessary setup to depart to dynamic mode).
  • Activate the analysis and run the dynamic scenario.
  • Workshop: Activated Dynamic Compressor Surge

Aspen Technology, Inc. awards Continuing Education Units (CEUs) for training classes conducted by our organization. One CEU is granted for every 10 hours of class participation.