Objectives

• Develop the skills and techniques required for creating and running dynamic simulations
• Build dynamic models of various unit operations, including distillation column control
• Learn the best practices for transitioning from steady-state to dynamic modeling

 Who Will Benefit

• Professionals
• Fresh Graduates
• Students

 Prerequisites

• Familiarity with Aspen HYSYS / UniSim Design steady-state modeling concepts and Aspen HYSYS / UniSim Simulation Workbook
• Or previously attended Process Simulation & Modeling Aspen Hysys Basic Course / Steady State Process Simulation Basics By Using UniSim Course

 Course Detail

Getting Started in Steady State

• Review the fundamental steps and requirements for building a steady-state model in Aspen HYSYS / UniSim
• Learn about a variety of shortcuts, tips and tricks
• Develop a steady state module for transitioning purpose

 Transitioning from Steady State to Dynamics

• Understand the requirements of Aspen HYSYS / UniSim Dynamics Pressure/Flow Solver
• Define dynamic pressure/flow specifications and equipment sizing data
• Review the solving strategy and degrees of freedom analysis of HYSYS / UniSim Dynamics
• Utilize the Dynamics Assistant to check the preparedness of a simulation for dynamic calculations
• Convert a steady-state Aspen HYSYS / UniSim simulation a HYSYS / UniSim Dynamics simulation

Controllers and Strip Charts

• Review basic process control theory and methodology
• Discuss the commonly used Controller operations in HYSYS / UniSim Dynamics
• Add Strip Charts to monitor and graph key process variables
• Introduce PID controllers and Strip Charts to augment an Aspen HYSYS / UniSim Dynamics simulation

Dynamic Column Modeling

• Review the procedure for converting a steady state model into dynamics
• Prepare a distillation column for dynamic simulation by using a Tray Sizing analysis
• Model a distillation column in dynamics and develop an effective control strategy
• Set up a distillation column in steady state mode, transition back into dynamics, and operate the distillation column as a dynamic unit operation

Expanding the Model

• Follow best practices for adding dynamic specifications, unit operations and controllers in the dynamic mode
• Develop appropriate control strategies
• Add equipment and modify the control system in simulation directly in dynamic mode
• Model rotating equipment in the dynamic mode and apply performance curves to better represent the dynamic behavior

Column Pressure Relief

• Modify the condenser overhead section of a distillation column to include an Exchanger operation
• Further develop model-building techniques and best practices by adding operations and controllers in the dynamic mode
• Install a relief valve for protection of the column overhead system
• Set up a customized distillation column overhead condenser system and protect it from overpressure with a relief valve

Event Scheduler

• Implement the Event Scheduler to build automated sequences in HYSYS / UniSim Dynamics
• Set up a scenario for a vessel and implement process safety measures via the Event Scheduler

Dynamic Compressor Surge Analyses

• Model compressors using performance curves
• Set up a compressor to perform dynamic surge analyses
• Run surge analysis with different dynamic scenarios (HYSYS)