Getting Started with Aspen HYSYS Dynamics

1 2012 Aspen Technology, Inc. All rights reserved Getting Started with Aspen HYSYS Dynamics Solving safety and operability challenges Dr. Glenn Dissinger, Product Director, Aspen Technology Hosted by: Ron Beck, Product Marketing, AspenTech Optimizing Operations Webinar Sept 5, 2012 2012 Aspen Technology, Inc. All rights reserved | 2 Ongoing Series of Technical Webinars Engineering Webinars for education and best practices UPCOMING WEBINARS OF INTEREST: Sept 5, 2012: Getting Started with Aspen HYSYS Dynamics Sept 13, 2012 (Asia/Pacific time): Improved Heat Exchanger Design with aspenONE EDR Integrated with Process Modeling (Tom Ralston) Sept 20, 2012: Improving Olefins Plant Feedstock Flexibility and Window of Operation Using Aspen Plus (Phil Edwards, SABIC UK) Oct 24, 2012: Modeling Conversion of Carbon to Biomass in Algal Systems (Dr.)

2 Eric Dunlop, Pan Pacific) Dec 12, 2012: Solid Phase Modeling in Specialty Chemicals (Ajay Lakshmanan) OTHER TOPICS TO BE ANNOUNCED A library of additional recent webinars on many engineering topics is available on the AspenTech public website 2012 Aspen Technology, Inc. All rights reserved | 3 Common Models & Data aspenONE Integration Support Manufacturing & Supply Chain Conceptual Engineering Basic Engineering Detailed Engineering aspenONE engineering Best-in-class engineering solutions in an integrated work flow Aspen Simulation Workbook & Aspen Online Deployment Aspen Petroleum Downstream & HYSYS Upstream Aspen Equipment Design & Rating Aspen Basic Engineering Aspen Capital Cost Estimator (ACCE) Aspen Plus Dynamics , ACM & Flare System & Energy Analyzer Aspen Plus Aspen HYSYS Aspen Process Economic Analyzer (APEA) Detailed Engineering 2012 Aspen Technology, Inc.

3 All rights reserved | 4 Agenda Introduction to Dynamic Simulation What Is It? Applications Overview of HYSYS Dynamics Demo Transitioning a Steady-State Model to Dynamics Q&A 2012 Aspen Technology, Inc. All rights reserved | 5 Process Dynamics Consider the simple bath tub example Steady-state: Fi = Fo Dynamic: dV/dt = Fi Fo where V=Vinit @ t=0 V=H*A Fo = k * H Dynamic simulation predicts how a process and its associated control system will respond to various disturbances as a function of time Usage has been increasing Better tools Safety and quality demands have increased Today, steady-state design by itself is not enough!

4 2012 Aspen Technology, Inc. All rights reserved | 6 Applications of Dynamic Modeling & Simulation Design / Analysis of Control Schemes Design the process and control system simultaneously Analyze and improve basic control strategies ( , fractionators, compressor surge, location of sensors, etc.) Pre-tune control loops Evaluate, develop and test APC scenarios (DMCplus) Operability Engineering Studies Understand dynamic plant behavior, including upset propagation ( , slugging) Operability studies of highly-integrated processes Design / analysis of start-up, shutdown and process transition strategies Hazard and Safety Studies Design / analysis of pressure relief and flare systems Safety studies Design / analysis of emergency shutdown systems Operator Training DCS checkout Graphics functionality/operability of the operator consoles 2012 Aspen Technology, Inc.

5 All rights reserved | 7 Agenda Introduction to Dynamic Simulation What Is It? Applications and Success Stories Overview of HYSYS Dynamics Demo Transitioning a Steady-State Model to Dynamics Q&A 2012 Aspen Technology, Inc. All rights reserved | 8 What Does HYSYS Dynamics Offer? Seamless transition from Steady State to Dynamic Interactive environment Rich choice between simple and detailed modeling A comprehensive library of control and logical operations Dynamics Assistant 2012 Aspen Technology, Inc. All rights reserved | 9 Steady State Dynamic mode Completely Integrated with HYSYS Same program Same GUI Same thermodynamic models All input data are shared Steady state results can be used as initialization for dynamic simulation 2012 Aspen Technology, Inc.

6 All rights reserved | 10 Rich choice between simple and detailed modeling options - Vessels Simple Design Dynamics A vessel with only the volume specified Detailed Plant Dynamics A vessel with Vessel elevation defined Nozzle positions defined Heat losses defined Entrainment modeling Level taps or 2012 Aspen Technology, Inc. All rights reserved | 11 Rich choice between simple and detailed modeling options - Valves Simple Design Dynamics A linear valve with instant action Detailed Plant Dynamics An equal percentage valve with an actuator with linear rate an actuator with a defined fail mode a holdup an offset to simulate leaking or 2012 Aspen Technology, Inc.

7 All rights reserved | 12 Controllers Boolean Operations Logical Operations Comprehensive Library of Controller and Logical Operations Used to replicate control logic and strategies used in the actual plant DCS system 2012 Aspen Technology, Inc. All rights reserved | 13 Dynamics Assistant Can be VERY useful as a guide to see what changes it recommends However, use the Make Changes button with caution as its advice may NOT be what you want to do 2012 Aspen Technology, Inc. All rights reserved | 14 Agenda Introduction to Dynamic Simulation What Is It? Applications and Success Stories Overview of HYSYS Dynamics Demo Transitioning a Steady-State Model to Dynamics Q&A 2012 Aspen Technology, Inc.

8 All rights reserved | 15 Additional Data Required for a Dynamic Model Dynamic Model Steady-State Model Initial Model Input: Thermodynamics Components Unit Operations Flowsheet Construction Dynamic Model Additional Input: Pressure-Flow Specs Equipment Sizing Controllers Strip Charts 2012 Aspen Technology, Inc. All rights reserved | 16 Transitioning from Steady State to Dynamics 4 Steps are Needed Flow Setup and Specifications Sizing up your Control Strategy up your Strip Charts and Run the Model 2009 AspenTech. All Rights Reserved. Transitioning from Steady State to Dynamics Step 1: Pressure Flow Setup and Specifications 2012 Aspen Technology, Inc.

9 All rights reserved | 18 Solver Basics Aspen HYSYS Dynamics Solver is different from the Steady State Solver Steady State Pressures and Flows are not related, but can be set independently Flow = 495 m3/s Pres = 130 kPa Flow = 55 m3/s Pres = 120 kPa Flow = 440 m3/s Pres = 120 kPa Flow = 440 m3/s Pres = 375 kPa Flow = 440 m3/s Pres = 365 kPa Flow = 440 m3/s Pres = 375 kPa No pressure drop across heat exchanger! 2012 Aspen Technology, Inc. All rights reserved | 19 Pressure Flow Solver in HYSYS Dynamics Pressures and Flows are related, and can NOT be set independently Flow = 495 m3/s Pres = 130 kPa Flow = 55 m3/s Pres = 120 kPa Flow = 440 m3/s Pres = 120 kPa Flow = 440 m3/s Pres = 375 kPa Flow = 440 m3/s Pres = 348 kPa Flow = 440 m3/s Pres = 360 kPa There must be a pressure drop to get a flowrate!

10 ! 2012 Aspen Technology, Inc. All rights reserved | 20 Pressure-Flow Relationship Concepts All unit operation models are categorized in one of the following categories Pressure Node Operations contain significant volume and calculate a pressure based on the holdup of vapor in the unit operation Resistance Equation Operations calculate a pressure drop based on a resistance equation P/F specifications MUST be set on all boundary streams 2012 Aspen Technology, Inc. All rights reserved | 21 Guidelines for Transitioning to Dynamics a resistance unit operation ( , valve, pump, compressor) between all pressure nodes in the flowsheet Internal flow rates will be calculated by the pressure gradients throughout the flowsheet P/F specification should be made on each boundary stream (feeds and products)