Dy01_Getting Dtarted in Steady State

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Getting Started in Steady State 1

G etting S ta rted in S teady S ta te

2005 AspenTech - All Rights reserved.EB1017.04.05Document1


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2 Getting Started in Steady State

WorkshopThe Getting Started in Steady State module introduces you to some of the basicconcepts necessary for creating simulations in Aspen HYSYS. Some of the thingsyou will learn from this module are:

Methods for moving through different environments Selecting property packages and components Gaining familiarity with the new property views of Aspen HYSYSDynamics Adding streams Adding operations

You will use Aspen HYSYS to define streams and unit operations to develop aFlowsheet for a DePropanizer column feed train.

Lea rn ing Ob j ec tiv e sOnce you have completed this section, you will be able to:

Define a Fluid Package (Property Package, Components) Add Streams Add Operations Process Overview

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B u ild in g a S te ad y S ta te S im u la tio nT he S im u la tio n B as is M an ag erAspen HYSYS uses the concept of the Fluid Package to contain all necessaryinformation for performing flash and physical property calculations. This approachallows you to define all information (property package, components, hypotheticalcomponents, interaction parameters, reactions, tabular data, etc.) inside a singleentity. There are four key advantages to this approach:

All associated information is defined in a single location, allowing for easycreation and modification of the information. Fluid Packages can be stored as completely defined entities for use in any

simulation. Component lists can be stored out separately from the Fluid Packages ascompletely defined entities for use in any simulation. Multiple Fluid Packages can be used in the same simulation. However, theyare all defined inside the common Basis Manager.

The Simulation Basis Manager is a property view that allows you to create andmanipulate multiple Fluid Packages or Component Lists in the simulation.

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The first tab of the Basis Manager allows you to manage the Component List(s) usedinyour case. There are a number of buttons available:Figure 1

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View. Allows you to access the property view for the selected ComponentList. Add. Allows you to create a Component List. Note: Component Lists canalso be added via the Fluid Package property view. Delete. Removes the selected Component List from the simulation. Copy. Makes a copy of the selected Component List. Import. Allows you to import a pre-defined Component List from disk.Component Lists have the file extension .crnl. Export. Allows you to export the selected Component List to disk. The

exported Component List can be retrieved into another case, by using theImport function. Refresh. Allows you to reload and update all the pure component propertydata from the database. If you have a case created with an older version of

Aspen HYSYS, you can update the pure component database to the latestversion by using the Refresh function.

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The Fluid Pkgs tab allows you access to the Fluid PackageslFlowsheet associationslist as well as the Fluid Package definition. As with older versions, Aspen HYSYSallows the user to use multiple fluid packages within a single simulation byassociating the fluid packages with various Flowsheets and linking the Flowsheetstogether. However, beginning with Aspen HYSYS version 3.0 the user no longerrequires the use of flowsheets to employ multiple fluid packages within a singlesimulation. The user can now utilize the Stream Cutter operation to incorporatemultiple Fluid Packages into a single flowsheet.Figure 2

Basis Environment icon

View. This is only active when a Fluid Package exists in the case. Itallowsyou to view the property view for the selected Fluid Package. Add. Allows you to create and install a Fluid Package into the simulation. Delete. Removes the selected Fluid Package from the simulation. Copy. Makes a copy of the selected Fluid Package. Everything is identicalin the copied version, except the name. This is useful for modifying fluid

packages. Import. Allows you to import a pre-defined Fluid Package from disk. Fluid

Packages have the file extension .fpk. Export. Allows you to export the selected Fluid Package to a disk. Theexported Fluid Package can be retrieved into another case, by using the

Import function.You can use the CTRL B hot key to re-enter the Simulation Basis Manager from anypoint in the simulation or choose the Basis Environment icon from the toolbar.(When in the Simulation Basis Manager, this is the Home View button).

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D efin in g th e S im u la tio n B as is1. Start a new case by selecting the New Case icon.2. Go to the Fluid Pkgs tab and create a fluid package by selecting the Add button.

New Case icon 3. Choose the Peng-Robinson Equation of State model.Figure 3

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4. Change the name from the default Basis-l to DePropanizer.5. Select the View button in the Component List Selection section of the Set Up

tab. This will allow you to add components to the Component List that is nowassociated with the DePropanizer Fluid package.You can select components for your simulation using several different methods.

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You can add a range ofcomponents by highlightingthe entire range andcl ick ing the Add Purebutton.

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Object I DescriptionMatch Cel l 1. Select one of the three name formats, SimName, Full

Namel Synonym, or Formula by select ing thecorresponding radio button.

2. Click the Match cell and enter the name of the component.As you start to type, the list will change to match what youhave entered.

3. Once the desired component is highl ighted, either: Press the ENTER key Click the Add Pure button Double-c lick the component to add it to your simulat ion.

Component List 1. Using the scroll bar for the main component list, scrollthrough the l ist unt il you f ind the desired component.

2. To add the component, either: Press the ENTER key Click the Add Pure button. Double-c lick the component to add it to your simulat ion.

Filters 1. Ensure the Match cell is empty and click the V iew Filtersbutton.

2. Select the Use Filter check box to display the variousfamily filters.

3. Select the desired family ( i.e., Hydrocarbons) from the l is tof Family Fi lters to display only that type of component.

4. Use either of the two previous methods to then select thedesired component.

6. Select the library components Ethane, Propane, i-Butane, n-Butane, i-Pentane,n-Pentane, and n-Hexane.

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7. Close the Component List View.8. Close the Fluid Package view.


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You have now completed the installation of a fluid package and may begin buildingthe simulation. Click the Enter Simulation Environment icon.

S elec ting a U nit S etIn Aspen HYSYS, it is possible to change the unit set used to display the differentvariables.1. From the Tools menu, choose Preferences.2. Switch to the Variables tab.Figure 5

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-3. Select the desired unit set. Both Field and SI units will be given in this module,

so choose the unit set that you are most comfortable with.4. Close the Session Preferences view.

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C h an gin g U nits fo r a S pe cif ic atio nTo change the units for a specification, simply type the numerical value of thespecification and press the space bar to switch to the inline unit drop-down menu.Choose the units for the value you are providing. Aspen HYSYS will convert theunits back to the default units.Figure 6

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A d din g S tre am sIn Aspen HYSYS, there are two types of streams, Material and Energy. Materialstreams have a composition and parameters such as temperature, pressure andtlowrate. They are used to represent Process Streams. Energy streams have only oneparameter, a Heat Flow. They represent heating and cooling duties in a plant as wellas power to drive pumps and compressors.


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There are a variety of ways to add streams in Aspen HYSYS.To use this .. I Do this ...Menu Bar Select Add Stream from the Flowsheet menu.or

Press the F11 Hot Key.The Stream property view wil l open.

Workbook Open the Workbook and go to the Material S treams tab. Typea stream name into the New cell.Object Palette Select Object Palette from the Flowsheet menu.

or Press F4 to open the Object Palet te. Double-c lick thestream icon.

In this exercise, you will add numerous streams.

E n te rin g S tre am C ompo sitio nsThere are two different methods to enter stream compositions.

To use this. .. I Do this ...Condition page

or Double-click the Molar Flow cell to enter mole fractions.

Double-click the Mass Flow cell to enter mass fractions.or

Double-click the LiqVol Flow cell to enter volumefractions.The Input Composit ion for Stream dialog is shown.

Composition page Click the Edit button. The Input Composition for Stream dialogis shown.

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E JSteady State moder ; ; : ; ; : : 1~Dynamic mode

Aspen HYSYSautomatically normalizesthe compositions once yourcl ick the OK button. Ensurethat you have entered theright composition valuesbefore click ing the OKbutton.

To edit a cell or to changethe value specified with in acell , you will need to pressthe F2 function key. AspenHYSYS now supports in-line editing.

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A dd ing a S tream from the M enu Bar/H o t K eyThis procedure describes how to add a stream using the Fll hot key. (You should bein the Simulation Environment). Note that you are in Steady State mode.1. Press the Fll hot key. The stream property view is displayed:Figure 7

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. + , 'if2. Add a stream with the following information and compositions:In this ceil ... Enter ...WorksheetName NGL FeedTemperature 15C (60F)Pressure 380 kPa (55 psia)Std Ideal Liq Vol Flow 200 m3/hr (30,000 bbl/d)Composition (Mole Fraction)Ethane 0.01Propane 0.43i-Butane 0.07n-Butane 0.12i-Pentane 0.05n-Pentane 0.04n-Hexane 0.28

3. Close the Stream Property view.


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A dd ing a S tream from th e O bjec t P ale tte1. If the Object Palette is not open on the Desktop, press the F4 hot key to open it.2. Double-click the Material Stream icon, (the blue arrow on the Object Palette).The Stream property view displays.3. Change the name of the stream to Shell-Out and supply the following

information and compositions:In this cell... Enter ...WorksheetName Shell-OutTemperature 155DC (310DF)Pressure 1100 kPa (160 psia)Std Ideal Liq Vol Flow 55 m%r (8300 bbl/d)Composition (Mole Fract ion)Ethane 0Propane 0i-Butane 0n-Butane 0.03i-Pentane 0.11n-Pentane 0.11n-Hexane 0.75

4. Close the Stream Property view.Object Palette S av ing Y ou r C ase

You can use one of several different methods to save a case in Aspen HYSYS: From the File menu select Save to save your case with the same name. From the File menu select Save As to save your case in a different locationor with a different name. Click the Save icon on the too1bar to save your case with the same name.

Save your case as: Feed Stream.hsc.

Save your case! I13


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Add in g Ope ra tio n sAs with streams, there are various ways to install Unit Operations in Aspen HYSYS.Some of these methods immediately open the operation's Property View and somedo not.The initial Flowsheet for the DePropanizer Column feed train process will be built inSteady State mode. Generally, all of the necessary information required to specifythe unit operations for process design purposes is on the Design- Parameters tab.Once all the necessary information has been entered, the message OK will appear inthe status bar, and the colour of the status bar will change to green.To use this .. Do this ..Menu Bar Choose the Flowsheet option from the menu bar, andthen select Add Operation.

or Press the F12 hot key

Workbook Unit Ops page From the Unit Ops page o f the Workbook, clickthe Add Unit Op button.Object Palette Double-cl ick the operation icon and the Property view will

appear.

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A dd th e O pe ra tio nsChoosing one of the three methods listed on the previous page, add the followingoperations:

A dd a Va lveValve icon1. Choose NGL Feed as the Feed stream and type To Sep as the Product stream.

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2, Choose Parameters and specify a pressure drop 0[70 kPa (10 psi).Figure 9

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Separator icon

Pump icon


A dd a S ep ara to rAdd a separator and enter the following information:

In this cell... Enter ...ConnectionsName SeparatorInlet ToSepVapour Outlet Sep YapLiquid Outlet Sep Liq

Note that the Separator unit operation is completely defined in Steady State withouthaving to specify a pressure drop and a volume, but these are important parametersfor dynamic simulation analysis.

Add a Pum pAdd a pump and enter the following information:

In this ceil .. Enter ...ConnectionsName Feed PumpInlet Sep LiqOutlet Pump OutEnergy PumpQParametersDelta P 1900 kPa (275 psi)Adiabatic Efficiency 75% (default)

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A dd a ValveAdd another valve and enter the following information:

In this ceil ... Enter ...ConnectionsName VLV-101 {default}Inlet Pump OutOutlet Process-InParametersDelta P 70 kPa {10 psi}

A dd a H ea t E xchangerAdd a heat exchanger and enter the following information:

In this ceil .. Enter ..ConnectionsName Heat ExchangerTube Side Inlet Process-InShell Side Inlet Shell-InTube Side Outlet Process-OutShell Side Outlet Shell-OutParametersHeat Exchanger Model Exchanger Design End Point {default}Tube Side Delta P 70 kPa {10 psi}Shell Side Delta P 70 kPa {10 psi}UA 8000 kJ/C-h {4200 Btu/F-hr}Heat Leak/Loss None {default}


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Heater icon


A dd a H eate rAdd a heater and enter the following information:

In this ceil ... Enter ..ConnectionsName HeaterInlet Process-OutOutlet ColFeedEnergy Heater-QParametersDelta P 70 kPa (10 psi)WorksheetColFeed Temperature 50C (120F)

As an alternative to specifying a ColFeed Temperature of SOGC(120GF), wecould have specified a heater duty. This duty could have been entered on theDesignParameters tab.However, by specifying the Col Feed temperature, the heater duty isautomatically calculated. This is an example of the DOF analysis Aspen HYSYSuses in Steady State mode.

Save your case as: Feed Heater Train.hsc.

Save your case! I

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The A spen H YS YS D ynam ics A ss is tan tAspen HYSYS contains a Dynamics Assistant that helps new users developsuccessful dynamic simulations. The Assistant performs many tasks that the newuser may not be aware of, or familiar with.The Assistant is capable of suggesting specifications that will produce a workablesimulation; if, however, your simulation will deviate from the "standard," theAssistant may suggest specifications that are not desired in your simulation.For the purposes of this course, the Assistant will be deactivated to allow you tobecome familiar with tasks that the Assistant would do automatically. It is importantthat you become familiar with these tasks, because while the Dynamics Assistant is apowerful tool for creating simple dynamic simulations, it is not as useful whencreating nonstandard dynamic simulations.Open the Preferences view from the Tools drop down menu and select the Dynamicspage on the Simulation tab. By default, the first check mark under the Assistantoption on this page is unchecked. This will prevent the Dynamics Assistant frommake any changes to the examples we are working on. The page should look likethis.Figure 10

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Dy01_Getting Dtarted in Steady State

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