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EHY2102 - Aspen HYSYS Petroleum Refining – Unit O is not just another software tutorial. It is a systematic methodology to transform raw crude assays into actionable process designs – whether you are maximizing diesel yield, minimizing hydrogen consumption, or designing a grassroots hydrotreater.
By mastering the unit operations detailed in Unit O – from the atmospheric tower’s pumparounds to the catalytic reformer’s recycle compressor – you gain the confidence to tackle any refining simulation challenge. And in an industry where a 1% increase in liquid yield can mean millions of dollars annually, that confidence is priceless.
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Have you taken EHY2102? Which Unit O topic – CDU convergence, hydrotreater kinetics, or reformer modeling – did you find most challenging? Share your experience with the refining community.
Keywords: EHY2102, Aspen HYSYS Petroleum Refining, Unit O, crude distillation, hydrotreating simulation, vacuum distillation unit, catalytic reforming, HYSYS convergence, diesel HDS.
EHY2102: Aspen HYSYS Petroleum Refining: Process Modeling and Optimization for Refinery Unit Operations is a specialized training course designed by AspenTech to help engineers build and optimize complex refinery models. Core Course Objectives
The training focuses on the practical application of Aspen HYSYS for refinery-wide process modeling:
Build & Evaluate Models: Construct complex refinery reactors and flowsheets to predict stream yields and properties. EHY2102 Aspen HYSYS Petroleum Refining...Unit O...
Property Tracking: Monitor over 350 petroleum properties throughout the simulation to analyze end-product value.
Profit Analysis: Perform case studies and evaluate refinery profit margins for steady-state simulations.
Planning Integration: Understand the workflow for transferring HYSYS data to Aspen PIMS for updating refinery planning models. Key Refinery Unit Operations & Models
The course covers a suite of specialized unit operations and rigorous reactor models:
Distillation & Separation: Use of the Petroleum Distillation Column and Refining Short-Cut Column for atmospheric and vacuum crude modeling.
Reactor Systems: Includes Fluidized Catalytic Cracking (FCC), Hydrocracker, Catalytic Reformer, and Isomerization reactor models. Utility Operations:
Petroleum Feeder: Used to set up feeds as specific blends or cuts of petroleum assays. EHY2102 - Aspen HYSYS Petroleum Refining – Unit
Assay Manipulator: Adjusts petroleum properties within the flowsheet.
Product Blender: For final product specification and value analysis.
Petroleum Yield Shift Reactor: Creates simplified models for operations like Delayed Cokers. Workflow for Refinery Simulations
Assay Characterization: Import and manage crude oil assay information using the Petroleum Assay feature.
Flowsheet Construction: Add unit operations from the HYSYS palette to represent the refinery configuration.
Calibration: Tune models (especially distillation columns and reactors) to match actual plant data.
Optimization: Conduct case studies to determine the most profitable operating points. Have you taken EHY2102
EHY2102 goes beyond mass balance; it introduces rate-based distillation. This is where the "Petroleum Refining" nature of the course shines.
Instead of assuming 100% tray efficiency, you model the hydraulics.
The Insight: When you run the simulation with tray rating activated, Aspen HYSYS will calculate the jet flood and downcomer backup. Most refinery bottlenecks (specifically a crude tower flooding at +15% throughput) are captured here. The EHY2102 course dedicates three hours to adjusting feed nozzle location based on these hydraulic results, often debottlenecking a unit by 20% without hardware changes.
If you attempt to simulate a crude column using standard HYSYS property packages (e.g., simple Peng-Robinson without petroleum characterization), you will encounter three fatal errors:
EHY2102 - Unit O solves these by introducing:
During EHY2102 - Unit O, approximately 40% of lab time is spent on convergence strategies. Here are the top three methods you will learn:
If you are undertaking the EHY2102 module or utilizing these tools, here are the core competencies you will master:
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