Improved Energy Efficiency through Heat Integration

Approach

• Prospective students indicate ahead of course whether the main modeling tool used is Aspen Plus or Aspen HYSYS
• Instruction on basic topics
• Instructor-guided demonstrations of features
• Hands-on sessions exemplifying practical applications
• Detailed course notes

Pre-requisites

• EAP101 Aspen Plus: Process Modeling
• EHY101 Aspen HYSYS: Process Modeling

Agenda

• Overview of Aspen Energy Analyzer, Conceptual Design, Pinch Technology and features of Aspen Energy Analyzer
• Workshop : Manually design a small heat exchanger network to obtain better heat integration

• Construct Composite Curves to set energy recovery targets Access and view the desired inputs and results
• Introduce the “Pinch” to set an upper limit for heat recovery
• Architecture of Aspen Energy Analyzer and data input to automatically generate the targets
• Workshop: Manually construct composite curves and obtain calculated energy targets

• Introduce the basic structure of Aspen Energy Analyzer
• Basic input required for energy targets
• Obtain heating and cooling targets using Aspen Energy Analyzer
• Workshop: Input stream T-H data in the software and obtain energy targets.

• Fundamentals of cost, heat transfer area and number of unit targets.
• Use Aspen Energy Analyzer to obtain cost, area and unit targets
• Workshop: Use Aspen Energy Analyzer to obtain cost, are and unit targets. Manually calculate some of the results and verify the numbers.

• Familiarization with the  user interface for both Heat Integration (HI) Case and Heat Integration (HI) Project
• Learn placement of input and result forms, tables and plots in the software
• Workshop: Practice navigation of the GUI

• Use the "Aspen Energy Analyzer Process Simulator" interface to extract heat integration information from an Aspen HYSYS or an Aspen Plus process model
• Extract heat integration data from Excel template
• Workshop: Import data from Aspen Plus or HYSYS. Import heat integration data from an Excel template.

• Introduce the “Utility Pinch” to limit utility load
• Construct Grand Composite Curves that aid in the selection of multiple utilities
• Workshop: Use GCC method, cheapest utility principle and user specified method to obtain utility targets.

• Use Pinch Analysis to identify process modifications that produce step changes in performance
• Implement these modifications in the process simulation model
• Workshop: Study composite curve of a process and look for opportunity of process modification that can give better heat integration opportunity.

• Grid Diagram representation of the Heat Exchanger Network
• Mathematical model used in Aspen Energy Analyzer to solve the Heat Exchanger Network
• Simulate the Heat Exchanger Network and understand its behavior using Aspen Energy Analyzer
• Workshop: Use HEN Grid diagram to simulate different scenarios in an existing network.

• Use Aspen EDR or Aspen Capital Cost Estimator to estimate cost of heat exchanger units.
• Use exchanger costs to regress capital cost parameters for Energy Analysis
• Workshop: Use Aspen EDR and / or Aspen Capital cost estimator to obtain accurate cost and regress the parameters of capital cost used in Aspen Energy Analyzer.

• Introduction to Pinch Design Method (PDM) rules to manually design a Heat Exchanger Network
• Use the Aspen Energy Analyzer’s Heat Exchanger Network Grid Diagram for manual design
• Optimize design after network evolution using Aspen Energy Analyzer Optimizer
• Automatically generate Heat Exchanger Network Designs using Aspen Energy Analyzer
• Workshop: Use PDM rule to design a heat exchanger network that is near or on target.

• Introduction to Pinch Design Method (PDM) rules to manually design a Heat Exchanger Network
• Use the Aspen Energy Analyzer's Heat Exchanger Network Grid Diagram for manual design
• Optimize design after network evolution using Aspen Energy Analyzer Optimizer
• Automatically generate Heat Exchanger Network Designs using Aspen Energy Analyzer
• Workshop: Use PDM rule to design a heat exchanger network that is near or on target.

• Learn how to work with Aspen Energy Analyzer directly from Aspen HYSYS or Aspen Plus
• Learn how to change any parameter in this workflow:
• Change Utility
• Change cost parameters, etc.
• DTmin global and local
• Select automatic DTmin depending on process type
• Introduce retrofit functions to generate alternative designs
• Identify the optimum design to realize energy cost savings in the current simulation.

• Implement an optimum design obtained by Aspen Energy Analyzer into Aspen Plus/HYSYS model.
• Workshop: Use one of the designs obtained by using Aspen Energy Analyzer and implement the new design in Aspen Plus or HYSYS model.

• Obtaining performance improvements using HEN Operation and Decision Support
• Analyze how monitoring is usually done and how the performance trends are identified
• Identify possible actions to improve HEN performance
• Using Aspen Energy Analyzer Operations for Decision Support
• Workshop: Move to operations mode from a case file. Use operations mode to perform what if analysis and trend analysis.

• Discuss common problems and identify potential troubleshooting corrective actions that may help to resolve them.

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.