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Aspen Custom Modeler Overview
The document discusses Aspen Engineering Suite, a software package for integrated process engineering. It includes Aspen Plus and Aspen Custom Modeler. Aspen Plus is a process modeling tool that allows simulation of plant behaviors using mass and energy balances. It has rigorous equipment models and physical property methods. Aspen Custom Modeler allows creation of custom equipment models and process simulations. It uses a flowsheeting environment and includes optimization tools. An example is given of a Stirling engine model created in Aspen Custom Modeler that includes heat transfer and losses.
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Aspen Custom Modeler Overview
- 1. 1 Heat and PowerTechnology, Stockholm, Sweden ASPEN ENGINEERING SUITE OVERVIEW
- 2. 2 Heat and PowerTechnology, Stockholm, Sweden Software for integrated process engineering, including steady-state and dynamic process simulation, equipment design, and cost evaluation. General Overview Source: Aspen Technology, 2012
- 3. 3 Heat and PowerTechnology, Stockholm, Sweden ASPEN PLUS OVERVIEW
- 4. 4 Heat and PowerTechnology, Stockholm, Sweden Aspen Plus • Aspen Plus is a process modeling tool for conceptual design, optimization, and performance monitoring for diverse industries. Aspen Plus is a core element of AspenTech’s Process Engineering applications. • Given thermodynamic data, realistic operating conditions, and rigorous equipment models Its possible to simulate actual plant behaviors, by using basic engineering relations such as m ass and energy balances, and phase and chem ical equilibrium • Features Best-in-class physical properties methods and data Diverse Model library : Simulation of a wide range of processes Scalability for large and complex processes Online deployment of models: real-time optimization/ advanced process control applications Workflow automation: Aspen Plus models can be linked to Microsoft Excel® using Aspen Simulation Workbook or Visual Basic®
- 5. 5 Heat and PowerTechnology, Stockholm, Sweden Aspen Plus Source: Aspen Technology, 2012
- 6. 6 Heat and PowerTechnology, Stockholm, Sweden Simulation Steps 1. Define Process Flow Sheet. Units –Streams-Models 2. Specify Chemical Components 3. Specify Thermodynamic Model Estimation of physical properties 4. Specify Flow Rates and Thermodynamic conditions 5. Run Simulation – Analyze Results
- 7. 7 Heat and PowerTechnology, Stockholm, Sweden Example
- 8. 8 Heat and PowerTechnology, Stockholm, Sweden Define Process Flow Sheet Coal Drying Flowsheet WET-COAL NITROGEN DRY-REAC IN-DRIER DRY-FLSH EXHAUST DRY-COAL Source: Aspen Technology, 2012
- 9. 9 Heat and PowerTechnology, Stockholm, Sweden Specify Chemical Components Source: Aspen Technology, 2012
- 10. 10 Heat and PowerTechnology, Stockholm, Sweden Specify Thermodynamic Model Source: Aspen Technology, 2012
- 11. 11 Heat and PowerTechnology, Stockholm, Sweden Specify Flow Rates conditions Source: Aspen Technology, 2012
- 12. 12 Heat and PowerTechnology, Stockholm, Sweden Simulation Results Source: Aspen Technology, 2012
- 13. 13 Heat and PowerTechnology, Stockholm, Sweden ASPEN CUSTOM MODELER OVERVIEW
- 14. 14 Heat and PowerTechnology, Stockholm, Sweden General Overview • Aspen Custom Modeler is a process and equipment model development and simulation environment • Aspen Custom Modeler (ACM) is used to create rigorous models of processing equipment and to apply these equipment models to simulate and optimize continuous, batch, and semi-batch processes. • It is used across many industries including chemicals, power, nuclear, food and beverage, metals and minerals, pharmaceuticals, and othrers
- 15. 15 Heat and PowerTechnology, Stockholm, Sweden Features Designed for process engineers : ACM uses a flow sheeting environment based on streams and equipment and includes built-in understanding of components and process thermodynamics. Source: Aspen Technology, 2012
- 16. 16 Heat and PowerTechnology, Stockholm, Sweden Features Physical properties m ethods and data: ACM is fully integrated with Aspen Properties, it includes extensive databases of pure component and phase equilibrium data for chemicals, electrolytes, solids, and polymers Source: Aspen Technology, 2012
- 17. 17 Heat and PowerTechnology, Stockholm, Sweden Features Equation oriented architecture : ACM language is declarative, you say “w hat” you want and leave it to ACM to find out “how ”. - Solver for system of Algebraic Equations, based on Newton iterative procedure Source: Aspen Technology, 2012
- 18. 18 Heat and PowerTechnology, Stockholm, Sweden Features - System of differential and algebraic equations Integration Algorithms - Implicit: Implicit Euler (fixed or variable step), gear - Explicit: Explicit Euler, Runge Kutta Source: Aspen Technology, 2012
- 19. 19 Heat and PowerTechnology, Stockholm, Sweden Features Flexible user-defined form s Volume Time Hours Volume 9,0 9,5 10,0 10,5 11,0 11,5 12,0 12,5 13,0 13,5 14,0 0,0 50,0 100,0 Table Forms Time series Plot forms Phase Plots Pressure vs Volume Volume (m3) Pressure (Pa) 2,e-004 4,e-004 6,e-004 8,e-004 0,001 1,5e+007 2,e+007 2,5e+007 Mass distribution Crank angle (Rad) Regenerator space (kg) Expansion space (kg) Compression Space (kg) 0,0 1,57 3,14 4,71 6,28 0,0025 0,0075 0,0125 Profile Plots
- 20. 20 Heat and PowerTechnology, Stockholm, Sweden Features • Optim ization and estim ation tools enabling parameter fitting, data reconciliation, and steady-state and dynamic process optimization. Estimation example Source: Aspen Technology, 2012
- 21. 21 Heat and PowerTechnology, Stockholm, Sweden Features Optimization example
- 22. 22 Heat and PowerTechnology, Stockholm, Sweden Features • Flexible Task Language to define batch recipes, transition schemes, or to simulate process equipment failures or other disturbances Heating System example: Source: Aspen Technology, 2012
- 23. 23 Heat and PowerTechnology, Stockholm, Sweden Features • Export Equipm ents or process m odels Source: Aspen Technology, 2012
- 24. 24 Heat and PowerTechnology, Stockholm, Sweden Features •Library of control models : to simulate process control systems. •Online deployment of models : ACM includes an OLE for Process Control (OPC) interface, enabling links to process control and information management systems •Workflow automation: ACM models can be linked to Microsoft Excel® using Aspen Simulation Workbook or Visual Basic®, enabling workflow automation and allowing model deployment to casual users
- 25. 25 Heat and PowerTechnology, Stockholm, Sweden Model Example
- 26. 26 Heat and PowerTechnology, Stockholm, Sweden Departm ent of Energy Technology Stirling Engine Adiabatic Model + Losses Assumptions -Adiabatic expansion and compression spaces - Sinusoidal volume variations -Ideal gas inside the engine - Heat Losses -Friction and Pressure drop losses -Non ideal Regenerator - Heat transfer model from the external source to the engine included. Source: Urielli 2014, http://www.ohio.edu/mechanical/stirling/me422.html Source: Genoa Stirling, http://www.genoastirling.com/
- 27. 27 Heat and PowerTechnology, Stockholm, Sweden Heater Regenerator Cooler Stirling S7 S8 S9 Ideal Adiabatic Losses Solution Aspen- C++ Pressure Losses Internal Conducction Heat Exchangers Regenerator Losses Shuttle Effect Losses ) ( 1 dQri dQ ε − = JLd Tc Td kpDd z dQ ) ( 4 . 0 2 − = ρ µ ρ 2 . 2 A d V m fr P P m d Q − = ∆ ∆ = T L kA dQ ∆ = + Ths(source) Tks(source) Tho(heater) Tko(cooler) Teo=Tho Tco= Tko Solve Differential Equations Calculate Tc, Te After 360 (cycle) If Tc<>Tco Te<>Teo Tco=Tc Teo=Te Qheater Q cooler Qloss Th=Ths-Qhs/UA Tk=Tks-Qks/UA If Th<>Tho Tk<>Tko Tho=Th Tko=Tk Qheater Q cooler Qloss
- 28. 28 Heat and PowerTechnology, Stockholm, Sweden Preliminary Results – Adiabatic model Mass distribution Crank angle (Rad) Regenerator space (kg) Expansion space (kg) Compression Space (kg) 0,0 1,57 3,14 4,71 6,28 0,0025 0,0075 0,0125 Pressure vs Volume Volume (m3) Pressure (Pa) 2,e-004 4,e-004 6,e-004 8,e-004 0,001 1,5e+007 2,e+007 2,5e+007 Heat Crank angle (Rad) Q cooler (Joules) Q heater (Joules) 0,0 1,57 3,14 4,71 6,28 -4000,0 0,0 4000,0 8 000,0 Work crank angle Isothermal Work (Joules) Expansion work (Joules) Compression Work(Joules) Total Work (Joules) 0,0 1,57 3,14 4,71 6,28 0,0 20000,0
- 29. 29 Heat and PowerTechnology, Stockholm, Sweden THANKS