Pressure Relief Analysis Using Aspen HYSYS and Aspen Plus

• Define overpressure scenarios in Aspen HYSYS and Aspen Plus using industry-standard methods
• Design single or multiple relief valve arrangements for applicable relief scenarios
• Integrate relief device piping considerations into the study of overpressure scenarios

• High level instruction on pressure relief analysis
• Discussion on the general approach and the key elements for successful PSV design and rating
• Use of Aspen HYSYS/Aspen Plus in design and simulation exercises covering various pressure relief scenarios
• Hands-on workshops using examples using real steady-state simulations in Aspen HYSYS/Aspen Plus
• Detailed course notes and workshop instructions

• Previously attended EHY101 Aspen HYSYS: Process Modeling or EAP101 Aspen Plus: Process Modeling
• Or a working knowledge of Aspen HYSYS/Aspen Plus in steady-state

• Introduction to Pressure Relief Devices (PRDs) & Safety Analysis
• Identify and define relief valve design requirements
• Examine a high-level overview of a pressure relief analysis workflow
• Identify the benefits of relief valve analysis in Aspen HYSYS and Aspen Plus

• Getting Started
• Introduce the Aspen HYSYS/Aspen Plus Safety Analysis Environment
• Specify global values used in relief analysis including valve defaults, custom orifices, and line design preferences
• Review the available pressure relief devices in the Safety Analysis Environment and learn how to add them to a simulation
• Workshop: Getting Started in the Safety Analysis Environment

• Defining a Pressure Safety Valve (PSV)
• Define vessel design and operating conditions to the pressure relief study
• Review pressure safety valve types and their characteristics
• Gain familiarity with the PSV data forms in Aspen HYSYS/Aspen Plus
• Workshop: Setting Up an Equipment-Based Overpressure Analysis

• Identifying Relief Scenarios
• Learn the procedure for creating relief scenarios in Aspen HYSYS and Aspen Plus, incorporating items such as backpressure, required relieving rate, and orifice selection
• Discuss the inputs and methodology for Blocked Outlet emergencies
• Identify applicable relieving phase calculation methods and their applications
• Workshop: Analyzing Applicable Scenarios

• Fire Case Scenarios
• Introduce options for calculating fire case emergency relief situations in Aspen HYSYS and Aspen Plus
• Outline the basics of API 521 Wetted/Un-wetted and semi-dynamic approaches to calculating fire emergency relief rates
• Workshop: Calculate the Required Fire Relief Load

• Multiple Relief Valve Configurations
• Examine how to select a relief scenario for relief sizing purposes
• Explore how to configure multiple relief devices to handle varying potential emergency scenarios
• Workshop: Designing the Pressure Relief Device

• Relief Device Piping
• Discover how to construct and model inlet and outlet piping from a pressure relief device
• Configure line sizing parameters and criteria
• Workshop: Line Sizing in the Safety Analysis Environment

• Documenting Pressure Relief Device (PRD) Calculations
• Discuss how to access pressure relief device reports and documentation through the Documentation Builder feature
• Review the various types of documentation available and discuss its value for compliance and project reporting
• Workshop: Building Pressure Relief Analysis Documentation

Optional Exercises and Extra Materials ( Time Permitting)

• Export Data To Aspen Flare System Analyzer
• Review Aspen Flare System Analyzer as a tool for modeling vent & flare piping header systems
• Discuss the procedure for importing data from the HYSYS Safety Analysis Environment into a Flare System Analyzer file
• Workshop: Import PRD Data into Aspen Flare System Analyzer

• Calculating Relief Loads - Other Scenarios
• Review the option to internally calculate relieving rates for various emergency scenarios
• Discuss the calculations for control valve failure, heat exchanger tube rupture, thermal expansion, fan failure, and reflux failure scenarios
• Workshop: Calculate Relief Loads Based on Control Valve Failure
• Workshop: Calculate Relief Loads Based on Heat Exchanger Tube Failure
• Workshop: Calculate Relief Loads Based on Thermal Expansion

• Storage Tank Protection
• Introduce the Storage Tank Protection capability for modeling venting in/out of low pressure storage tanks
• Review the workflow for defining storage tank design data, normal venting parameters, and emergency venting settings
• Workshop: Evaluate Vent Rates for Storage Tank Protection