Modeling Processes with Equation Oriented Methods using Aspen Plus

Benefits

• Learn when to use the EO strategy over SM and how to efficiently convert your SM simulations to EO
• Understand how SM features, such as Design Specs and Calculator blocks, are translated to EO
• Manipulate the EO data entry, including Spec groups, EO input, and Analyzer blocks
• Heat integrate your process using the Heater/HXFlux combination
• Use Parameter Estimation and Data Reconciliation for model tuning
• Optimize a process using EO Optimization
• Effectively troubleshoot common EO simulation errors
• Access to Aspen Plus at worksite is needed before and after the course in order to gain full benefit

Approach

• Instruction on basic topics
• Discussion about the general approach and the key elements for successful simulations
• Instructor-guided demonstrations of the main features
• Hands-on workshops that apply learned concepts
• Detailed course notes

Pre-requisites

• Attend  EAP101 Aspen Plus:Process Modeling
• Designed as a stepping-stone between EAP101 Aspen Plus:Process Modeling and the EAP301 Aspen Plus: Real Time Modeling and Optimization courses, it is assumed that you are able to set up and run process models in sequential-modular (SM) mode in Aspen Plus.

Subsequent Courses

Agenda

• Differentiate between Equation Oriented (EO) and Sequential Modular (SM) modeling  approaches within Aspen Plus
• Discuss and demonstrate typical uses for EO Modeling
• Review the EO modeling inputs and control panel functions 
• Synchronize model from SM to EO
• Workshop:  Examine EO variables and create a query for the column duties and product flowrates

• Review workflow and general changes which may be required to run EO simulation
• Discuss reinitialization options and variables import/export
• Workshop Experiment with reinitialization and export of variables;

• Define and use Spec Groups and EO Input to change the Specifications of pairs of variables
• Workshop Create a Spec Group and enter EO Input data; set the variable specifications so that the water mole fraction in a stream is fixed and the distillate rate is calculated;

• Review how to specify connections
• Workshop Create a connection to enforce pressure equality for inlet streams of Flash2 block;

• Review and explain the options for User Calculations in the EO strategy
• Use the automatic variable mapping capabilities and create local parameter in Calculator blocks
• Review the setup of Analyzer block to generate EO variables
• Workshop: Set up and run a Calculator block in EO mode.

• Wrap-up workshop to review previous topics
• Workshop Configure an existing simulation in EO mode with minimal guidance;

• Identify and explain the modeling options for heat integration
• Use the Heater/HXFlux combination with Spec Groups and Connections to heat integrate your process in the EO simulation mode
• Workshop: Determine refrigerant flow and process conditions.

• Identify the Tuning modes in the EO strategy
• Learn how to setup a Parameter Estimation run
• Workshop: Use Parameter Estimation to calculate heat transfer coefficient based on known process outlet temperature.

• Learn how to use Reconciliation mode to tune a model
• Workshop: Use Reconciliation to calculate heat transfer coefficient by minimizing the measurement error in inlet flows and temperatures, and outlet cooling water temperature.

• Identify and explain equation oriented strategy for Optimization
• Workshop: Find the process cooling temperature that maximizes the profit.

• Review how to setup an EO Sensitivity Analysis
• Workshop: Perform an EO Sensitivity Analysis calculation

• Discuss the purpose of Scripts
• Review the syntax of scripts and how to execute them
• Review some typical script applications

• Review common causes of EO convergence problems
• Discuss troubleshooting tips for resolving EO convergence problems
• Workshop: Review EO troubleshooting techniques

• Identify and explain the features and capabilities of the following EO solvers
  • DMO
  • LSSQP
  • NSOLVE
  • XSLP
• Workshop: Use the different EO solvers and observe the output

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.