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2000 AspenTech. All Rights Reserved. Introduction to Flowsheet Simulation Objective: Introduce general flowsheet simulation concepts and Aspen Plus features Slide 2 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Flowsheet Simulation What is flowsheet simulation? Use of a computer program to quantitatively model the characteristic equations of a chemical process Uses underlying physical relationships Mass and energy balance Equilibrium relationships Rate correlations (reaction and mass/heat transfer) Predicts Stream flowrates, compositions, and properties Operating conditions Equipment sizes Slide 3 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Advantages of Simulation Reduces plant design time Allows designer to quickly test various plant configurations Helps improve current process Answers what if questions Determines optimal process conditions within given constraints Assists in locating the constraining parts of a process (debottlenecking) Slide 4 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus What is the composition of stream PRODUCT? To solve this problem, we need: Material balances Energy balances REACTOR FEED RECYCLE REAC-OUT COOL COOL-OUT SEP PRODUCT General Simulation Problem Slide 5 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Approaches to Flowsheet Simulation Sequential Modular Aspen Plus is a sequential modular simulation program. Each unit operation block is solved in a certain sequence. Equation Oriented Aspen Custom Modeler (formerly SPEEDUP) is an equation oriented simulation program. All equations are solved simultaneously. Combination Aspen Dynamics (formerly DynaPLUS) uses the Aspen Plus sequential modular approach to initialize the steady state simulation and the Aspen Custom Modeler (formerly SPEEDUP) equation oriented approach to solve the dynamic simulation. Slide 6 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Good Flowsheeting Practice Build large flowsheets a few blocks at a time. This facilitates troubleshooting if errors occur. Ensure flowsheet inputs are reasonable. Check that results are consistent and realistic. Slide 7 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Important Features of Aspen Plus Rigorous Electrolyte Simulation Solids Handling Petroleum Handling Data Regression Data Fit Optimization User Routines Slide 8 2000 AspenTech. All Rights Reserved. Aspen Plus References: User Guide, Chapter 1, The User Interface User Guide, Chapter 2, Creating a Simulation Model User Guide, Chapter 4, Defining the Flowsheet The User Interface Objective: Become comfortable and familiar with the Aspen Plus graphical user interface Slide 9 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Run ID Tool Bar Title Bar Menu Bar Select Mode button Model Library Model Menu Tabs Process Flowsheet Window Next Button Status Area The User Interface Reference: Aspen Plus User Guide, Chapter 1, The User Interface Slide 10 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus RStoic Model Heater Model Flash2 Model Filename: CUMENE.BKP REACTOR FEED RECYCLE REAC-OUT COOL COOL-OUT SEP PRODUCT Cumene Flowsheet Definition Slide 11 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Using the Mouse Left button click - Select object/field Right button click - Bring up menu for selected object/field, or inlet/outlet - Cancel placement of streams or blocks on the flowsheet Double left click - Open Data Browser object sheet Reference: Aspen Plus User Guide, Chapter 1, The User Interface Slide 12 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Graphic Flowsheet Operations To place a block on the flowsheet: 1. Click on a model category tab in the Model Library. 2. Select a unit operation model. Click the drop-down arrow to select an icon for the model. 3. Click on the model and then click on the flowsheet to place the block. You can also click on the model icon and drag it onto the flowsheet. 4. Click the right mouse button to stop placing blocks. Slide 13 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Graphic Flowsheet Operations (Continued) To place a stream on the flowsheet: 1. Click on the STREAMS icon in the Model Library. 2. If you want to select a different stream type (Material, Heat or Work), click the down arrow next to the icon and choose a different type. 3. Click a highlighted port to make the connection. 4.Repeat step 3 to connect the other end of the stream. 5.To place one end of the stream as either a process flowsheet feed or product, click a blank part of the Process Flowsheet window. 6.Click the right mouse button to stop creating streams. Slide 14 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Graphic Flowsheet Operations (Continued) To display an Input form for a Block or a Stream in the Data Browser: 1.Double click the left mouse button on the object of interest. To Rename, Delete, Change the icon, provide input or view results for a block or stream: 1.Select object (Block or Stream) by clicking on it with the left mouse button. 2.Click the right mouse button while the pointer is over the selected object icon to bring up the menu for that object. 3.Choose appropriate menu item. Reference: Aspen Plus User Guide, Chapter 4, Defining the Flowsheet Slide 15 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Automatic Naming of Streams and Blocks Stream and block names can be automatically assigned by Aspen Plus or entered by the user when the object is created. Stream and block names can be displayed or hidden. To modify the naming options: Select Options from the Tools menu. Click the Flowsheet tab. Check or uncheck the naming options desired. Slide 16 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus When finished, save in backup format (Run-ID.BKP). filename: BENZENE.BKP FL1 Heater Model Flash2 Model Flash2 Model COOL FEEDCOOL VAP1 LIQ1 FL2 VAP2 LIQ2 Benzene Flowsheet Definition Workshop Objective - Create a graphical flowsheet Start with the General with English Units Template. Choose the appropriate icons for the blocks. Rename the blocks and streams. Slide 17 2000 AspenTech. All Rights Reserved. Aspen Plus References: User Guide, Chapter 3, Using Aspen Plus Help User Guide, Chapter 5, Global Information for Calculations User Guide, Chapter 6, Specifying Components User Guide, Chapter 7, Physical Property Methods User Guide, Chapter 9, Specifying Streams User Guide, Chapter 10, Unit Operation Models User Guide, Chapter 11, Running Your Simulation Basic Input Objective: Introduce the basic input required to run an Aspen Plus simulation Slide 18 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus The User Interface Menus Used to specify program options and commands Toolbar Allows direct access to certain popular functions Can be moved Can be hidden or revealed using the Toolbars dialog box from the View menu Data Browser Can be moved, resized, minimized, maximized or closed Used to navigate the folders, forms, and sheets Slide 19 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus The User Interface (Continued) Folders Refers to the root items in the Data Browser Contain forms Forms Used to enter data and view results for the simulation Can be comprised of a number of sheets Are located in folders Sheets Make up forms Are selected using tabs at the top of each sheet Slide 20 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Object Manager Allows manipulation of discrete objects of information Can be created, edited, renamed, deleted, hidden, and revealed Next Button Checks if the current form is complete and skips to the next form which requires input The User Interface (Continued) Slide 21 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus The Data Browser Menu tree Previous sheet Next sheet Status area Parent buttonUnits Go back Go forward Comments Next Description area Status Slide 22 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Help Help Topics Contents - Used to browse through the documentation. The User Guides and Reference Manuals are all included in the help. All of the information in the User Guides is found under the Using Aspen Plus book. Index - Used to search for help on a topic using the index entries Find - Used to search for a help on a topic that includes any word or words Whats This? Help Select Whats This? from the Help menu and then click on any area to get help for that item. Slide 23 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Functionality of Forms When you select a field on a form (click left mouse button in the field), the prompt area at the bottom of the window gives you information about that field. Click the drop-down arrow in a field to bring up a list of possible input values for that field. Typing a letter will bring up the next selection on the list that begins with that letter. The Tab key will take you to the next field on a form. Slide 24 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Basic Input The minimum required inputs (in addition to the graphical flowsheet) to run a simulation are: Setup Components Properties Streams Blocks Data can be entered on input forms in the above order by clicking the Next button. These inputs are all found in folders within the Data Browser. These input folders can be located quickly using the Data menu or the Data Browser buttons on the toolbar. Slide 25 2000 AspenTech. All Rights Reserved. Introduction to Aspen Plus Status Indicators Input for the form is incomplete Input for the form is complete No input for the form has been entered. It is optional. Results for the form exist. Results for the form exist, but there were calculation errors. Results for the form exist, but there were calculation warnin