Training Course Data Sheet

EHY223

Aspen HYSYS Dynamics:
Introduction to Dynamic Modeling

Course
Number:

EHY223

Duration:

3 days

CEUs
Awarded:

2.1

Level:

Intermediate

Course Overview

·         Develop the skills and techniques required for creating and running dynamic simulations

·         Study items of interest in dynamic modeling such as vessel relief scenarios, compressor surge control, distillation column control,  and pipeline hydraulics

·         Learn the best practices for transitioning from steady-state to dynamic modeling and discover shortcuts for efficient use of HYSYS Dynamics

·         Study the effectiveness of process safety measures for the implementation of ESD (Emergency Shutdown systems) through implementation of the Event Scheduler

·         Help justify operational changes and counter regulatory concerns to comply with regulations and product quality constraints for process operations

Course Benefits

·         Explore your Dynamics model to introduce various real-life disturbances to a simulation and discover how different control strategies can mitigate these disturbance

·         Automate actions within a HYSYS Dynamics simulation by using the Event Scheduler tool

·         Learn pressure flow theory, column dynamics concepts, pipeline hydraulics, and process control theory

·         Properly define and adjust pressure flow specifications, strip charts, and controller parameters

·         Discover techniques and “rules of thumb” for controller tuning

Who Should Attend

·         Engineers with Aspen HYSYS experience

·         Engineers with no or limited previous experience in dynamic simulation

Approach

·         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

Prerequisites

·         Familiarity with Aspen HYSYS steady-state modeling concepts and Aspen Simulation workbook or have attended EHY101 Aspen HYSYS: Process Modeling  and EHY121 Building MS Excel User Interfaces for Aspen HYSYS Simulations Using Aspen Simulation Workbook

EHY223 Aspen HYSYS Dynamics: Introduction to Dynamic Modeling -Course Agenda

·         Define dynamic pressure/flow specifications and equipment sizing data

·         Add controllers and build strip charts to capture key results and operating data to analyze the process variables

·         Explore flow sheet summary table to enter inputs and review preference settings to maintain file backup and data size

·         Workshop: Review the basic concepts of steady state modeling in HYSYS, then convert the simulation into HYSYS Dynamics

·         More detailed investigation of the required inputs for a HYSYS Dynamics simulation

·         Learn about dynamic pressure/flow specifications for various unit operations

·         Review the solving strategy and degrees of freedom analysis of HYSYS Dynamics

·         Learn about the HYSYS Dynamics Assistant, flow sheet color scheme and key shortcuts for building dynamic models

·         Workshop: Vary the pressure flow spec around vessels and valves to perform backflow flow calculation for flow profile

·         Follow best practices for adding dynamic specifications, unit operations and controllers in the dynamic mode

·         Develop appropriate control strategies using split range and on-off controllers

·         Install a relief valve for vessel overpressure protection

·         Workshop: Add equipment, modify the control system and add a pressure relief valve to a simulation directly in Dynamic mode 

·         Specify head and efficiency curves for compressors

·         Use multiple curves to model compressor performance

·         Make changes and additions in Dynamic mode

·         Move Pressure-Flow specs when required

·         Accurately model existing plant equipment with Aspen HYSYS

·         Add anti-surge control to a compressor

·         Workshop: Apply performance curves to better represent the dynamic behavior of a compressor model. Implement a compressor surge control strategy to protect the equipment from potential damage

·         Configure LNG column model in HYSYS Dynamics

·         Prepare the column for dynamic simulation using tray sizing utility to calculate the tray holdup volume details

·         Develop an appropriate control strategy for the column reflux, tray temperature and condenser pressure

·         Explore the workflow to replace the column default kettle reboiler with a shell and tube heat exchanger

·         Workshop: Set up a distillation column in steady state mode and transition back into dynamics

·         Replace the standard condenser unit operation with a detailed overhead system including an air cooled exchanger

·         Make necessary P/F (Pressure / Flow) specs for the overhead system

·         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

·         Workshop: Set up a customized distillation column overhead condenser system

·         Introduction to Event Scheduler manager

·         Add Schedules and Build Sequences

·         Implement cause-and-event matrix

·         Create event conditions to activate valve actions

·         Workshop: Set up a fire scenario for a vessel and implement process safety measures

·         Learn the basics of process control theory including feedback and feed forward control

·         Discuss PID control action and options for tuning PID parameters

·         Examine general guidelines for implementing appropriate control strategies

·         Workshop: Basic discussion on control Theory for Dynamic Simulations

·         Basics of Modeling Multiphase Flow in Pipelines

·         Pipeline Modeling Options in HYSYS

·         Review pipeline hydraulics calculation options in Aspen HYSYS

·         Explore Aspen Hydraulics to model pipeline hydraulics

·         Pig launching, generating pipeline profiles and identifying slug regions

·         Workshop: Configure and use the pigging operations, and launch pig using ASW