DYNSIM Training Tutorials_1-4

DYNSIM Tutorials

DYNSIM Training Tutorials

Company Confidential


DYNSIM 5.1

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2

Table of Contents

TUTORIAL 1: Reverse Flow

TUTORIAL 2: Drum Level Control

TUTORIAL 3: Drum Scenarios

TUTORIAL 4: Flowsheet Modification

Company Confidential DYNSIM Tutorials

Reverse Flow

Drum Level Control

Drum Scenarios

Flowsheet Modification

DYNSIM Tutorials

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TUTORIAL 1

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4

TUTORIAL 1: Reverse Flow

Objective: Illustrate the configuration of a simple flowsheet to examine reverse flow across a

valve.

Step 1 Launch Dynsim

� Click on Start\Programs

Dynsim splash screen.

� Use SimSci for both the username and password and lau

on the Login button.

The Dynsim interface incorporate

PRO/II simulation, the steps to setup

� Define the Units of Measure (UOM)

� Select components and define component slates

� Define a Thermodynamic method and other default methods

� Lay down and define the models and control blocks

� Connect the blocks using appropriate streams

� Run the simulation and monitor the dynamic behavior of the pro

This example demonstrates how to model reverse flow through a valve.

Step 2 Create New Simulation

� Click File and select New and Simulation. The New Simulation dialog box will appear

and prompt for a simulation name, u

Create. The simulation will be created in a default user directory, as follows:


Reverse Flow

configuration of a simple flowsheet to examine reverse flow across a

Launch Dynsim

Programs\SIMSCI\DSS50, and select Dynsim 5.0, which brings up the

for both the username and password and launch the application by clicking

incorporates many of the elements found in the PRO/II GUI, and

the steps to setup a simulation are as follows:

Define the Units of Measure (UOM)

ect components and define component slates

Define a Thermodynamic method and other default methods

d define the models and control blocks

using appropriate streams

Run the simulation and monitor the dynamic behavior of the process

This example demonstrates how to model reverse flow through a valve.

New Simulation

select New and Simulation. The New Simulation dialog box will appear

for a simulation name, use ReverseFlow as the simulation name and click

. The simulation will be created in a default user directory, as follows:

DYNSIM Tutorials

configuration of a simple flowsheet to examine reverse flow across a

, which brings up the

nch the application by clicking

many of the elements found in the PRO/II GUI, and as in a

select New and Simulation. The New Simulation dialog box will appear

name and click

. The simulation will be created in a default user directory, as follows:

DYNSIM Tutorials

C:\SIMSCI

Tip: All Dynsim simulation files are saved in a zipped format using *.s4m extension.

the file rename the ex

WinZip

� Click View\Change Toolbars

Note: There are four User Profile roles

access to all Dynsim capabilities

different permissions use of

simulation and an Operator role cannot.

Simulators (OTS)

Step 3 Define the Units of Measure (UOM)

The UOM icon is denoted using a

available for use with Dynsim. To use a custom UOM, create a New

reference an existing UOM and then modify the units as needed

For this example, using SI

� Click on , and the New Slate button and t

SI as new UOM base, and then click OK.

� Highlight the Pressure

Measure window

� Click Custom radio button, select the pressure

Change. Note that


SIMSCI\DSS50\User\ReverseFlow.s4m.

All Dynsim simulation files are saved in a zipped format using *.s4m extension.

the file rename the extension to .zip and then open file using a compression utility such as

Change Toolbars\Engineer.

There are four User Profile roles under Change Toolbars. Administrator

access to all Dynsim capabilities whereas Operator, Instructor, and Engineer

different permissions use of the toolbar, e.g. an Engineer role can

and an Operator role cannot. The Operator role is used for the

program use a single integrated modeling environment.

Define the Units of Measure (UOM)

The UOM icon is denoted using a ruler icon. A standard set of predefined UOM lists are

available for use with Dynsim. To use a custom UOM, create a New UOM Sl

sting UOM and then modify the units as needed.

SI as the reference UOM and change Pressure units from kPa to kPag.

, and the New Slate button and type EngSI as new UOM slate na

as new UOM base, and then click OK.

Pressure parameter, and double click kPa. It will open Change Unit

Measure window

Click Custom radio button, select the pressure new pressure unit as

Note that check marks appear on the UOMs changed.

5

All Dynsim simulation files are saved in a zipped format using *.s4m extension. To unzip

tension to .zip and then open file using a compression utility such as

under Change Toolbars. Administrator role allows full

ator, Instructor, and Engineer roles have

role can edit and modify a

used for the Operator Training

e integrated modeling environment.

A standard set of predefined UOM lists are

UOM Slate and then

as the reference UOM and change Pressure units from kPa to kPag.

as new UOM slate name, select

. It will open Change Unit-of-

new pressure unit as kPag, and click

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Step 4 Select Components and Define Component Slates

Select all the components

containing all or a subset of those components

� Click on the component

the simulation.

component from the library to the Selected

name, alias, or the chemical formula in the Add Library Component cell

Add or Enter button.

� Add the following components

Selected Components list.


Select Components and Define Component Slates

he components needed for the entire simulation and then a create a

t of those components to improve the computational speed

component icon to define components and thermodynamics

. Using the Library tab select the pure components

component from the library to the Selected Components column or

, or the chemical formula in the Add Library Component cell

or Enter button.

Add the following components Ethylene, Ethane, Propane, and

Selected Components list.

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Select Components and Define Component Slates

create a components slate(s)

computational speed.

components and thermodynamics methods for

pure components by either dragging the

Components column or by typing the full

, or the chemical formula in the Add Library Component cell and clicking

, and IsoButane to the

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The next step is to define the component slates.

Tip: A component slate contains all or a

of a cooling water stream there may

Dynsim calculates, for example, the enthalpy of a particular stream at a particular time step,

it only needs to consider those components defined in the component

faster calculation speeds. This is important

numbers of components.

� Click on the Slate tab and

Add. Multi select all components

Ethane, Ethylene, Propane


next step is to define the component slates.

A component slate contains all or a subset of the Selected Components list, e.g., in the case

cooling water stream there may only be one component i.e. water. As a result, when

or example, the enthalpy of a particular stream at a particular time step,

it only needs to consider those components defined in the component slate resulting in

. This is important for large simulation models containing large

and create a New Component Slate called PROCESS

Multi select all components from the Selected Components list, Drag and drop

Ethane, Ethylene, Propane and IsoButane to the PROCESS Components

DYNSIM Tutorials

, e.g., in the case

water. As a result, when

or example, the enthalpy of a particular stream at a particular time step,

slate resulting in

for large simulation models containing large

PROCESS and click

Drag and drop

PROCESS Components Slate list.

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Step 5 Define a Thermodynamic Method

The next step is to specify a thermodynamic method.

� Click on the Method

� Expand the Thermodynamic Data tree

and Density and select Soave

method. For this simulation, the components selected consist of light hydrocarbons and

therefore an equation of state method such as SRK or PR is appropriate.


Define a Thermodynamic Method

The next step is to specify a thermodynamic method.

Click on the Method tab and create a New Method Slate called SRK

Expand the Thermodynamic Data tree. Right click on Equilibrium, Enthalpy, En

and select Soave-Redlich-Kwong Equation of State for the property

. For this simulation, the components selected consist of light hydrocarbons and


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SRK and click Add.

Equilibrium, Enthalpy, Entropy

uation of State for the property

. For this simulation, the components selected consist of light hydrocarbons and


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� Click on the Default tab

Slate and SRK for Method Slat

Thermodynamics window.


tab and under Default Objects select PROCESS for Component

for Method Slate and click OK to save and close the Components and

Thermodynamics window.

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for Component

OK to save and close the Components and

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All subsequent models placed on flowsheet will use this default component slat

thermodynamic methods.

Step 6 Lay Down Models

Create the Flowsheet by

� Select the Icon Palette icon. This palette appears o

on the View me

window containing streams, models and

Tip: Alternatively, select the Types

the same list of the

includes graphical libraries for widgets, primitives, and references that are not on the Icon

Palette.

� From the Icon Palette, click to select a Source, move the mouse to flowsheet canvas, and

then click to drop it on the flowsheet.

� Double click on the source icon or right click and select

Data Entry Window (DEW)


All subsequent models placed on flowsheet will use this default component slat

thermodynamic methods.

Lay Down Models

by either using the Icon Palette or the Types tab, as follows:

Icon Palette icon. This palette appears on the main toolbar or

on the View menu and selecting it from there which displays a floating Icon Palette

containing streams, models and controls

Alternatively, select the Types tab on the bottom left hand corner of the screen

of the model libraries that the Icon Palette contains. The Types tree also


From the Icon Palette, click to select a Source, move the mouse to flowsheet canvas, and

drop it on the flowsheet. Do the same with a Valve and a Sink.

ouble click on the source icon or right click and select Data Entry

Data Entry Window (DEW) to configure the source.

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All subsequent models placed on flowsheet will use this default component slate and

, as follows:

n the main toolbar or by clicking

a floating Icon Palette

on the bottom left hand corner of the screen and contains

hat the Icon Palette contains. The Types tree also


From the Icon Palette, click to select a Source, move the mouse to flowsheet canvas, and

Do the same with a Valve and a Sink.

Data Entry to bring up a

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Note: The data entry window box

suggested optional data. If you override a Red, Yellow, or Green, the entry box will also

have no color. Once all of the red and yellow data is completed, the red

change to a blue .

Note: If you select the Edit option, the Object Editor Viewer (OEV) pops

contains a super set of all the parame

� Enter the following data:

� Enter the component composition data:

Propane to 4 kg-mol, and

normalized to 1.

� Click the Thermo Tab and n

is Process.

� Click OK.


The data entry window boxes are color-coded. Red: required data; Yellow:


have no color. Once all of the red and yellow data is completed, the red

If you select the Edit option, the Object Editor Viewer (OEV) pops-up. This window

contains a super set of all the parameters associated with this Model for advanced users.

Enter the following data: Pressure to 3550 kPag, and Temperature to 395 K.

Enter the component composition data: Ethylene to 3 kg-mol, Ethane to 2 kg

mol, and IsoButane to 2 kg-mol. Note: the molar composition will be

and note that the Thermo method is SRK and the component slate

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. Red: required data; Yellow: strongly


on the tab will

up. This window

his Model for advanced users.

95 K.

mol, Ethane to 2 kg-mol,

molar composition will be

component slate

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� Enter the following


Enter the following information for the Valve model, CV = 100

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� Enter the following information for the Sink model, Pressure = 200


Enter the following information for the Sink model, Pressure = 200 kPag.

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kPag.

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Step 7 Connect the Units Using Appropriate Streams

� Next, connect the m

types available in Dynsim

Stream Type

Process Stream

Heat Stream

Mechanical Stream

Electrical Stream

Connectors

Note: Valid port locations are highlighted


Connect the Units Using Appropriate Streams

connect the models using the Process Stream type. Note: there are other stream

types available in Dynsim as follows:

Description

Used for connecting models from the base equipment lib

represents compositional streams.

Used for connecting utility exchangers to models that can have a duty

associated with them, e.g., distillation column and separator etc.

Used for linking a mechanical drive to a model, e.g., a shaft linked to a

pump or compressor.

Used for linking electrical models to process equipment, e.g., an

electrical bus connected to a motor.

Used for linking a signal variable to the input of a controller and the

output of a controller to a final control element, e.g.,

port locations are highlighted green.

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Connect the Units Using Appropriate Streams

there are other stream

Used for connecting models from the base equipment library and

Used for connecting utility exchangers to models that can have a duty

associated with them, e.g., distillation column and separator etc.

Used for linking a mechanical drive to a model, e.g., a shaft linked to a

Used for linking electrical models to process equipment, e.g., an

variable to the input of a controller and the

output of a controller to a final control element, e.g., valve.

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Note: If a big arrow remains on the flowsheet like the figure above, this means that the stream

was not properly connected.

Step 8 Start and Monitor the Dynamic Behavior

The flowsheet is ready to run, click the start button

frozen state. To run the simulation, click on the Resume button

Once the simulation up and running,

� Select the Flow Rate Indicator from the Refe

the flow rate through the valve

� Drop the Flow Rate Indicator below the valve and

be tracked, in this case S2. A green arrow denotes a positive flow rate in the direction

specified by the stream. A red arrow denotes reverse flow.

� Double click on the valve flowsheet icon

valve position using the

Rate Indicator shows a positive flow rate in the direction of flow specified by the user

(green arrow).


If a big arrow remains on the flowsheet like the figure above, this means that the stream

was not properly connected. Retry connecting the stream to the equipment.

Start and Monitor the Dynamic Behavior

click the start button , to load and start the simulation

state. To run the simulation, click on the Resume button .

imulation up and running, test the dynamic behavior of the system as follows:

Select the Flow Rate Indicator from the References library on the Types

the flow rate through the valve

Flow Rate Indicator below the valve and enter the stream name that needs to


specified by the stream. A red arrow denotes reverse flow.

Double click on the valve flowsheet icon to open the Valve faceplate and ad

valve position using the slider. Set the position to 100% open and notice

shows a positive flow rate in the direction of flow specified by the user

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If a big arrow remains on the flowsheet like the figure above, this means that the stream

start the simulation in the

system as follows:

rences library on the Types tab to monitor

the stream name that needs to


and adjust the

and notice that the Flow

shows a positive flow rate in the direction of flow specified by the user

DYNSIM Tutorials

To modify the boundary condition of the sink (i.e.

in the Data Entry Window,

follows:

� Select a Slider from the W

� Right click and

name of the Sink followed by the parameter we wish to control.

� The Min/Max ra

orientation is set to vertic

Before varying this parameter (Sink Pressure Boundary) remotely, change its designation from

STATIC to DYNAMIC

� Highlight the Sink, right click

Viewer (OEV) interface

� Change the Poi

DYNAMIC and


o modify the boundary condition of the sink (i.e. pressure) without having to edit the par

in the Data Entry Window, drop a Slider onto the flowsheet and link it to sink

Select a Slider from the Widgets library on the Types tab and drop it on

and select Draw Attributes. For Point Name type SNK1.PB, which is the

name of the Sink followed by the parameter we wish to control.

ranges for the slider are set to 500 and 5000 kPa respectively, and the

orientation is set to vertical. Set the width and height to 100 and 300.


DYNAMIC.

ight the Sink, right click and select Edit. This brings up the Ob

Viewer (OEV) interface

Change the Point Class for the parameter PB under the Boundary Conditions to

and click Apply and OK.

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pressure) without having to edit the parameter

to sink pressure as

rop it onto the flowsheet.

SNK1.PB, which is the

0 kPa respectively, and the

to 100 and 300.


Edit. This brings up the Object Editor

ndary Conditions to

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� Click LF button to load the changes.

� Click to resume running the si

� Vary the pressure of the Sink by mov

� To display the exact value of the pressure at the sink

library on the Types tab

reference variable.

Note: STATIC points are model

simulation and represent physical dimensions

and cannot change during a simulation

flows that change during the simulation.

Step 9 Induce Reverse Flow in the Model

� Increase the pressure at SNK1

vertical slider on the flowsheet.

across the valve reduces and e

� To customize the flowsheet graphics such

Types\Primitives\Rectangle and d

select Draw Attributes and choose a fill color.

the colors

� Click OK to confirm the selection.

� To move the primitive objects,

selected object, hold down the left button, and move the object.


to load the changes.

resume running the simulation.

the pressure of the Sink by moving the slider.

the exact value of the pressure at the sink, select a Point from the References

tab, place it next to the Sink block, and enter SNK1.PB

STATIC points are model parameters, which are normally fixed parameters for the

and represent physical dimensions such as valve Cv, drum diameter, and so on

and cannot change during a simulation. DYNAMIC points are temperatures, press

ing the simulation.

Induce Reverse Flow in the Model

the pressure at SNK1 slowly by adjusting the position of the pointer on the

vertical slider on the flowsheet. As the pressure increases at the sink end

reduces and eventually the pressure at the sink end causes reverse flow.

To customize the flowsheet graphics such as highlighting the slider, select

Rectangle and draw a rectangle around the slider then ri

select Draw Attributes and choose a fill color. Double click on the fill color to

lick OK to confirm the selection.

ve the primitive objects, select the object first, move the mouse to the edge of

hold down the left button, and move the object.

DYNSIM Tutorials

select a Point from the References

enter SNK1.PB for the

are normally fixed parameters for the

rum diameter, and so on

are temperatures, pressures, and

by adjusting the position of the pointer on the

end, the flow rate

causes reverse flow.

lect

around the slider then right click and

on the fill color to customize

select the object first, move the mouse to the edge of

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� Select Start\Stop to shut down the simulation.

� Select File\Save to save the simulation.

� Select File\Close to close the simulation or File

save this file before you exit


Stop to shut down the simulation.

Save to save the simulation.

Close to close the simulation or File\Exit to close Dynsim. It is important to

ou exit Dynsim, because it will be required in the next tutorial.

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Exit to close Dynsim. It is important to

in the next tutorial.

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TUTORIAL 2

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TUTORIAL 2: Drum Level Control

Objective: Illustrates how to setup a simple flowsheet with a very basic control scheme. At the

end of this section, the flowsheet should l

into a flash drum and a PI controller to maintain the

adjusting the valve position.

Step 1 Launch Dynsim

We will start to build on the work already

� Launch Dynsim, and type username and password as

� Click File\Open and select the previous simulation file

simulation

� Click File\Save As …, and give a new name

Step 2 Define Simulation

� Click the UOM icon and make sure to select

Close the UOM window by clicking OK.

� Click to open the Compo

Methane, Propane, and

� Select the Slate Tab and

Methane, Ethane, Propane

� Click the Method Tab; and


Drum Level Control

setup a simple flowsheet with a very basic control scheme. At the

end of this section, the flowsheet should look similar to the image below, with a source feeding

drum and a PI controller to maintain the level in the drum at a fixed value by

Launch Dynsim

work already completed in Tutorial 1:

Launch Dynsim, and type username and password as SimSci and SimSci.

Open and select the previous simulation file ReverseFlow.s4m

Save As …, and give a new name LevelControl and save the file.

Define Simulation

icon and make sure to select EngSI UOM created in the Tutorial 1.

lose the UOM window by clicking OK.

to open the Components and Thermodynamics window. Add new components

, and n-Butane under the Library Tab.

and create new slate called NATURALGAS, which contains

Propane and n-Butane.

; and select SRK thermodynamic slate created previously.

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setup a simple flowsheet with a very basic control scheme. At the

ook similar to the image below, with a source feeding

at a fixed value by

.

ReverseFlow.s4m. to open the

and save the file.

created in the Tutorial 1.

dd new components

contains

thermodynamic slate created previously.

DYNSIM Tutorials

� Click the Default

and keep the Method Slate as

Step 3 Change Flowsheet Canvas

� Select the Lasso key and draw a box around the primitive rectangle object. Right

click and select the

� Click on the stream S2 to highlight it, then place your mouse pointer on the black square

that covers the connection between S2 and SNK

square and drag the stream away from SNK1, and then disconnect it from SNK1.

� Move SNK1 to the top right hand corner of the flowsheet canvas.


Default Tab; change the Component Slate from PROCESS

eep the Method Slate as SRK and click OK.

Change Flowsheet Canvas

Lasso key and draw a box around the primitive rectangle object. Right

select the Delete from the menu. Repeat the procedure to delete Slide also.

Click on the stream S2 to highlight it, then place your mouse pointer on the black square

that covers the connection between S2 and SNK1, Disconnect will appear. Click on the


Move SNK1 to the top right hand corner of the flowsheet canvas.

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ROCESS to NATURALGAS

Lasso key and draw a box around the primitive rectangle object. Right

Delete from the menu. Repeat the procedure to delete Slide also.

Click on the stream S2 to highlight it, then place your mouse pointer on the black square

1, Disconnect will appear. Click on the


Move SNK1 to the top right hand corner of the flowsheet canvas.

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Step 4 Lay Down Base Equipment Models

� Drop down the following new models on the flowsheet canvas.

Unit Name

Drum V1

Valve PV1

Valve LV1

Sink SNK2

� Connect the models using process streams as shown in the figure below:


Lay Down Base Equipment Models

llowing new models on the flowsheet canvas.

Attributes

Configuration = Vertical, Diameter = 1.5 m, Length = 3 m,

Thickness = 12.7 mm

Inlet port height = 0.01 m

Port Diameter = 100 mm

Source Initialization Object = SRC1

Cv = 75, Time to Open & Close = 5 sec

Cv = 50, Time to Open & Close = 5 sec

Pressure = 100 kPag

Connect the models using process streams as shown in the figure below:

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Configuration = Vertical, Diameter = 1.5 m, Length = 3 m,

Connect the models using process streams as shown in the figure below:

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Step 5 Configure Base Equipment Models

� Right click on the source

change the Component Slate from

two phases.

� Click on the Basic

SRC1 Property

Pressure

Temperature

Composition

Methane

Ethane

Propane

n-Butane

� Click OK to save the modifications.

� Right click on the sink SNK1 and select the Data Entry

kPag, and click OK.

� Right click on the valve XV1 and select the Data Entry

the Component Slate to

both open and close the valve. On the Basic

Properties option.

� Right click on the drum V1 and select the Data Entry


Configure Base Equipment Models

Right click on the source SRC1 and select the Data Entry . Click on the Thermo

change the Component Slate from Process to NaturalGas, and select Ex

lick on the Basic tab and enter the following data

SRC1 Property Specification

ssure 8,000 kPag

Temperature 300 K

Composition kg-mol

Methane 1.0

Ethane 0.5

Propane 0.3

Butane 0.1

Click OK to save the modifications.

Right click on the sink SNK1 and select the Data Entry . Reset th

click OK.

Right click on the valve XV1 and select the Data Entry . On the Thermo

the Component Slate to NaturalGas. On the Actuator tab, enter 5 seconds for the time to

h open and close the valve. On the Basic tab, check the box to

Properties option.

Right click on the drum V1 and select the Data Entry . and enter the following details

25

Click on the Thermo tab,

and select External phase as

eset the pressure to 100

. On the Thermo tab, change

, enter 5 seconds for the time to

box to Calculate Outlet

. and enter the following details

26

� On the Thermo tab, select

slate.

� On the Feeds tab, specify that S2 is the inlet stream with a Port Height of 0.01 m and a

Port Diameter of 100 mm.

� On the Initialization Tab, list the source SRC1 as the initialization object.

� Right click on the valve PV1 and select the Data Entry

details:

PV1 Valve Parameter

Valve Coefficient

Calculate Critical Flow

Critical flow Coefficient XT

Time to Open Valve

Time to Close Valve

Thermo Method

Component Slate

� Right click on the sink SNK2 and select the Data Entry

to 100 kPag

� Right click on the valve LV1 and select the Data Entry

LV1 Valve Parameter

Valve Coefficient

Time to Open Valve

Time to Close Valve

Thermo Method Slate

Component Slate

Step 6 Lay Down Controller Model

Add a level controller for the drum.

� Click the Types tab and the Controls Library and select a PID controller model. Lay it

down on the flowsheet canvas; name it LC1


select SRK as the method slate and NaturalGas as the component

tab, specify that S2 is the inlet stream with a Port Height of 0.01 m and a

Port Diameter of 100 mm.

On the Initialization Tab, list the source SRC1 as the initialization object.

Right click on the valve PV1 and select the Data Entry and enter the following

Valve

75 Cv

Check

0.7

5 sec

5 sec

SRK

NaturalGas

ick on the sink SNK2 and select the Data Entry and set the boundary pressure

Right click on the valve LV1 and select the Data Entry enter the following details

Valve

50 Cv

5 sec

5 sec

SRK

NaturalGas

Lay Down Controller Model

dd a level controller for the drum.

and the Controls Library and select a PID controller model. Lay it

the flowsheet canvas; name it LC1. Click OK.

DYNSIM Tutorials

as the component

tab, specify that S2 is the inlet stream with a Port Height of 0.01 m and a

On the Initialization Tab, list the source SRC1 as the initialization object.

enter the following

the boundary pressure

enter the following details:

and the Controls Library and select a PID controller model. Lay it

DYNSIM Tutorials

� The Configure PID

Step 7 Configure Connectors

The measured variable is the liquid level in the drum. The manipulated variable is the val

position

.

� To make the connection, go to the Types

Default Connector


he Configure PID LC1 window pops-up. Select Level radio butto

Configure Connectors

he measured variable is the liquid level in the drum. The manipulated variable is the val

To make the connection, go to the Types tab, select the Connectors library, and c

Default Connector. Click on the drum V1 and keeping the left mouse button pressed

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radio button and click OK

he measured variable is the liquid level in the drum. The manipulated variable is the valve

Connectors library, and click

and keeping the left mouse button pressed

28

drag the connector stream to the controller LC1. Dynsim automatically

parameters are to link based on type of controller configuration selected.

Note: Always click and drag the connector in the direction of data flow, i.e. from the vessel to the

controller.

� If Dynsim cannot determine the parameters automati

than one, then define them manually

Select the Process Variable

liquid phase from the Calculated Values

� Link the controller LC1output to the valve LV1

connector stream from the controller to the valve. In this case, controller parameter is

the Output, and the valve parameter is the

which are linked automatically.


connector stream to the controller LC1. Dynsim automatically defa

based on type of controller configuration selected.

click and drag the connector in the direction of data flow, i.e. from the vessel to the

If Dynsim cannot determine the parameters automatically because there may be more

define them manually using Parameter Assignment window that pops up.

Process Variable from the Inputs node of controller LC1 and select

Calculated Values node of the drum L1.

Link the controller LC1output to the valve LV1 using Default Connector


, and the valve parameter is the Open Command under the Externa

automatically.

DYNSIM Tutorials

defaults to which

based on type of controller configuration selected.

click and drag the connector in the direction of data flow, i.e. from the vessel to the

because there may be more

using Parameter Assignment window that pops up.

node of controller LC1 and select Level of

Default Connector and drag a


External Inputs,

DYNSIM Tutorials

Step 8 Configure Controller Model

� Right click on the controller LC1 and select

controller to Direct (

input to 0.0 m.

process variable.

parameter reference equal to zero.

� Click OK.


Configure Controller Model

Right click on the controller LC1 and select Data Entry. Specify the Action of

controller to Direct (PV-SP). Provide High limit on input to 3.0 m and Low limit on

input to 0.0 m. On the Connections tab, note that V1.L has already been entered as the

process variable. In the Set Point section of the connections tab, leave the

ameter reference equal to zero.

29

Specify the Action of

o 3.0 m and Low limit on

has already been entered as the

, leave the Set point

30


DYNSIM Tutorials

DYNSIM Tutorials

Step 9 Load Simulation and Specify Set Point

� Click the Start button, to load the simulation model.

� Double click on the controller LC1 to open the faceplate to change mode, controller

output and set point values.

window.

Note: Note the controller faceplate will only

is shutdown, double clicking on the controller, brings up DEW for the model.

Step 10 Create Reference Points

� Click on the Types tab

under the streams S3 and S5. S1 should already have one.

� Click on the Instances

and select OP –

of valve open rate XV1.OP. This displays

1.0 represents a fully open valve

� Similarly create

additional points

Point Name

SRC1.FLASH.VF

SIMSPD

V1.Flash.P

V1.Flash.T

V1.Flash.MWV


tep 9 Load Simulation and Specify Set Point

Start button, to load the simulation model.

Double click on the controller LC1 to open the faceplate to change mode, controller

output and set point values. Specify LC1 Setpoint (m) to 1 m. Click OK to close the

Note the controller faceplate will only appear during simulation mode. When the simulation


Step 10 Create Reference Points

on the Types tab and select the References library. Place Flow Rate Indicators

under the streams S3 and S5. S1 should already have one.

Click on the Instances tab and extend the object tree all the way to XV1

– Open Command, then drag it to the flowsheet canvas

valve open rate XV1.OP. This displays the position of the valve as a fraction

1.0 represents a fully open valve and 0.0 represents a fully closed valve.

Similarly create valve open rate points for valve PV1 and LV1 and

additional points:

Parameter

Vapor fraction in Source SRC1

Speed of simulation as a % of real time

Pressure in the drum V1

Temperature in the drum V1

Molecular weight of Vapor in V1

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Double click on the controller LC1 to open the faceplate to change mode, controller

to 1 m. Click OK to close the

mode. When the simulation


Flow Rate Indicators

and extend the object tree all the way to XV1\External Inputs,

then drag it to the flowsheet canvas to create the point

tion of the valve as a fraction where

0.0 represents a fully closed valve.

nts for valve PV1 and LV1 and also add these

32

Step 11 Create Trends

� Click on the icon Trends, and drop it on the flowsheet canvas.

typed into the point cell

interest and clicking the

� Examine the behavior of the

liquid level, metal temperature, and fla

monitoring. Click Apply once to

� Deselect the check marks under the Auto column a

the following picture.

� Click OK and enter the

associate the trend as follows:


Trends, and drop it on the flowsheet canvas. Any point

into the point cell or selected using the Instances tab drilling down to the poin

ing the Add button.

Examine the behavior of the system when V1 is depressurized. Add the drum pressure,

liquid level, metal temperature, and flash and fluid temperature to the chart for

Click Apply once to save the changes.

k marks under the Auto column and set Ymin and Ymax

Click OK and enter the Trend Name as well as the Flowsheet name with which to

as follows:

DYNSIM Tutorials

ny point can be

drilling down to the point of

he drum pressure,

sh and fluid temperature to the chart for

Ymax as shown in

th which to

DYNSIM Tutorials

Step 12 Create Snapshots

Run the simulation and view the behavior of the system.

� Click on the

� Click on the Resume button

� Double click on the va

on the valve PV1 to

Hint: To reach steady state

� When the system

and open it full 100%

� Observe the point

Note: Model changes are uploaded

click the Resume button

� Wait for the simulation to reach steady state conditions, and then save an initial

condition snapshot or IC by clicking on the Snapshot

name the IC Steady St

� Click Shutdown button, save,

be required for next tutorial.


Create Snapshots

un the simulation and view the behavior of the system.

Save key to save the modifications to LevelControl.s4m

Click on the Resume button to start the simulation.

Double click on the valve XV1 and using the slider open valve 100% and

on the valve PV1 to 10% open position and let the system come a steady state condition

steady state quickly, increase the simulation speed in the Running Panel.

When the system is stable, double click on the valve PV1 (if you closed the faceplate)

and open it full 100%.

point references on the Depressurizing Trend

Model changes are uploaded without reloading the simulation by clicking the

he Resume button to start again.

Wait for the simulation to reach steady state conditions, and then save an initial

condition snapshot or IC by clicking on the Snapshot button on the tool bar and

Steady State.

Shutdown button, save, and close the simulation. This workshop answer

for next tutorial.

33

LevelControl.s4m.

100% and double click

and let the system come a steady state condition.

the simulation speed in the Running Panel.

ble click on the valve PV1 (if you closed the faceplate)

by clicking the and then

Wait for the simulation to reach steady state conditions, and then save an initial

button on the tool bar and

This workshop answer will

34


DYNSIM Tutorials

DYNSIM Tutorials


TUTORIAL 3

35

36

TUTORIAL 3: Drum Scenarios

Objective: Set up and record scenarios, scenarios

Step 1Launch Dynsim

� Launch Dynsim and Open the

the button to start the simulation.

� After the simulation has loaded,

Summary icon to bring up the IC


Drum Scenarios

Objective: Set up and record scenarios, scenarios capture the flowsheet changes with time.

Open the LevelControl simulation created in Tutorial 2 and

the simulation.

After the simulation has loaded, the IC Summary icon becomes active. Click on IC

Summary icon to bring up the IC SteadyState previously saved in Tutorial 2

DYNSIM Tutorials

flowsheet changes with time.

eated in Tutorial 2 and click

becomes active. Click on IC

previously saved in Tutorial 2.

DYNSIM Tutorials

� Click on the “Num” column to highlight the

simulation model to the

� Click Yes when asked Are you sure?


lick on the “Num” column to highlight the IC SteadyState and click

imulation model to the SteadyState condition.

Click Yes when asked Are you sure?

37

and click Load to restore the

38

Step 2 Record two Scenarios

The next step is to record two different scenarios.

First is a depressurizing scenario.

� Isolate the flash drum by closing all three valves (i.e. the inlet and two outlet

Continue to run the simulation without chang

time.

� The Depressuring trend located in the Instances tab under the FS tab, double click to

open it.

� Display the Scenario Summary Window by clicking on the

the button.

� Open the valve PV1 on the vapor outlet line from the drum

trends change as the vessel depressurizes down to atmospheric pressure.

� Create Scenarios manually

would record a macro in Microsoft Excel. Clicking

the icon to . Click on the Stop Recording button t

click the button

� Pause the simulation once the

the drum.


Record two Scenarios

wo different scenarios.

irst is a depressurizing scenario.

Isolate the flash drum by closing all three valves (i.e. the inlet and two outlet

Continue to run the simulation without changing anything for a minute of simulation

ing trend located in the Instances tab under the FS tab, double click to

Display the Scenario Summary Window by clicking on the scenario icon. Click on

on the vapor outlet line from the drum slowly and w

trends change as the vessel depressurizes down to atmospheric pressure.

s manually using a custom scripting language or record a scenario as one

n Microsoft Excel. Clicking the record scenario button changes

Click on the Stop Recording button to stop scenario recording or

button to pause scenario recording.

Pause the simulation once the flow rates are steady and then close the valves

DYNSIM Tutorials

Isolate the flash drum by closing all three valves (i.e. the inlet and two outlet valves).

ing anything for a minute of simulation

ing trend located in the Instances tab under the FS tab, double click to

scenario icon. Click on

slowly and watch how the

a custom scripting language or record a scenario as one

the record scenario button changes

scenario recording or

the valves to isolate

DYNSIM Tutorials

Hint: To close the valve on the liquid outlet stream from the drum, LV1, double click on the level

controller to bring

between manual and automatic control

� Click on “Manual”

dragging the slider to zero.

Step 3Check steady state

� Hit the resume key and watch as the valves change color, going from green to

yellow to red. Allow the simulation to run for a minute

valves closed. Bring up the

liquid level in the drum.


To close the valve on the liquid outlet stream from the drum, LV1, double click on the level

to bring up the controller’s “faceplate” within which the

between manual and automatic control and specify a new set point for the controller.

Click on “Manual” button to override the controller and manually close the valve

dragging the slider to zero.

steady state

resume key and watch as the valves change color, going from green to

yellow to red. Allow the simulation to run for a minute of simulation time

ed. Bring up the Depressuring trend to examine the pressure, temperature and

liquid level in the drum.

39

To close the valve on the liquid outlet stream from the drum, LV1, double click on the level

controller can be toggled

set point for the controller.

to override the controller and manually close the valve by

resume key and watch as the valves change color, going from green to

of simulation time with all the

trend to examine the pressure, temperature and

40

Note a slight disturbance to the drum pressure and liquid level as the valves close, isolating the

drum from the rest of the model.

Step 4 With the drum isolated and the simulation running,

the drum. Watch how the trends change as the valve moves from fully closed to fully open.



drum from the rest of the model.

lated and the simulation running, open PV1, the valve on the vapor outlet from


DYNSIM Tutorials


open PV1, the valve on the vapor outlet from


DYNSIM Tutorials

� When the pressure in the drum reaches atmo

clicking on the

Dynsim will automatically bring up the script of the scenario just recorded

by editing the script itself.


When the pressure in the drum reaches atmospheric pressure, stop the scenario by

clicking on the button. Save the scenario as Depressuring Drum V1

Dynsim will automatically bring up the script of the scenario just recorded

ng the script itself.

41

spheric pressure, stop the scenario by

as Depressuring Drum V1.

Dynsim will automatically bring up the script of the scenario just recorded which can be modified

42

At any time review or run the recorded scenario by clicking on the

Step 5 Record blowdown scenario

The second scenario simulates a blowdown of the drum V1.

steady state IC.

� Click on the icon, select “

simulation.

� Resume the simulation and isolate the drum by closing all three valves.

� Display the Scenario Summ

the button.

� To model a blowdown, slowly open valve LV1 after a minute of simulation time by

double clicking on the LC

valve by manipulating the slider.


or run the recorded scenario by clicking on the scenario summary icon.

Record blowdown scenario

The second scenario simulates a blowdown of the drum V1. Restore the simulation back to the

icon, select “SteadyState” and hit restore. This restores and freezes the

the simulation and isolate the drum by closing all three valves.

Display the Scenario Summary Window by clicking on the scenario icon. Click on

To model a blowdown, slowly open valve LV1 after a minute of simulation time by

on the LC1 controller, switch to manual operation and slow open the

valve by manipulating the slider.

DYNSIM Tutorials

scenario summary icon.

mulation back to the

restores and freezes the

scenario icon. Click on

To model a blowdown, slowly open valve LV1 after a minute of simulation time by

low open the

DYNSIM Tutorials

� Observe the resulting trend that tracks both the temperature inside the drum and

temperature of the drum wall as the blowdown occurs.

� Stop and save the scenario when the pressure inside

pressure.

Note to compare changes in metal and fluid temperature in the drum use the sa

Ymax values for V1.TM and V1.Flash.T.

Step 6

Having saved the two scenarios they can be run

the scenario summary icon, highlight the scenario and hit the “Run” key

Summary window.


Observe the resulting trend that tracks both the temperature inside the drum and

temperature of the drum wall as the blowdown occurs.

Stop and save the scenario when the pressure inside the drum reaches atmospheric

Note to compare changes in metal and fluid temperature in the drum use the sa

for V1.TM and V1.Flash.T.

ing saved the two scenarios they can be run at any time during the simulatio

scenario summary icon, highlight the scenario and hit the “Run” key

43

Observe the resulting trend that tracks both the temperature inside the drum and

the drum reaches atmospheric

Note to compare changes in metal and fluid temperature in the drum use the same Ymin and

at any time during the simulation by clicking on

scenario summary icon, highlight the scenario and hit the “Run” key on the Scenario

44

The scenario changes from yellow to green indicating it is active and running.

Dynsim freezes the simulation and notifies

scenario run.

� Shutdown the existing simulation


The scenario changes from yellow to green indicating it is active and running.

ezes the simulation and notifies the user with a pop-up window at the end of the

Shutdown the existing simulation and click on File\Save As “LevelControl2”.

DYNSIM Tutorials

up window at the end of the

“LevelControl2”.

DYNSIM Tutorials


TUTORIAL 4

45

46

TUTORIAL 4: Flowsheet Modificat

Objective: This tutorial looks at how to add a pump and attach a utility exchanger to the drum in

the existing simulation. When you are finished, the model should look something like this

to this schematic for point references a

We would like to build on the work already completed in Tutorial 2

Step 1 Define UOM

The UOM, the component and method slates ar

definition of the unit operations.

� Make the following changes to the flowsheet equipment models:

Unit Name

Source SRC1

Valve PV1

Sink SNK1


Flowsheet Modification

This tutorial looks at how to add a pump and attach a utility exchanger to the drum in

the existing simulation. When you are finished, the model should look something like this

point references and flow indicator locations.

ork already completed in Tutorial 2.

The UOM, the component and method slates are unchanged and there are some changes to the

ollowing changes to the flowsheet equipment models:

Attributes

Pb = 8000 kPag

Cv = 300

Pressure = 100 kPag

DYNSIM Tutorials

This tutorial looks at how to add a pump and attach a utility exchanger to the drum in

the existing simulation. When you are finished, the model should look something like this, refer

there are some changes to the

DYNSIM Tutorials

Step 2 � Start the simulation

� Open XV1 to 100% and

resume simulation.

Step 3 � Allow the simulation to

clicking the “Camera” icon

� Display the snapshot summary window, by clicking on the Initial Conditions Icon

(Snapshots are also called Initial Conditions)

saved.


tart the simulation in freeze mode using the button .

Open XV1 to 100% and PV1 to 50%. Unfreeze the simulation and let it run using the

resume simulation.

Allow the simulation to reach steady state and then create a snapshot called “SS” by

the “Camera” icon on the Snapshot pane.

he snapshot summary window, by clicking on the Initial Conditions Icon

(Snapshots are also called Initial Conditions) to see that the snapshot has been

47

the simulation and let it run using the

create a snapshot called “SS” by

he snapshot summary window, by clicking on the Initial Conditions Icon

to see that the snapshot has been

48

Step 4 � Add a pressure controller on the drum to provide a constant suction

Unit Name

Controller PC1

Step 5 � Connect the controller by dragging the

PC1.PV to V1.P. You can

� Drag the Default Connector from PC1 to PV1

PC1.Out automatically.

Step 6 � Press LF to load your model changes.

� Resume the simulation

� Save a snapshot when the

Step 7 � Add a Pump between the Drum V1 and Valve LV1 to the flowsheet

Unit Name


Add a pressure controller on the drum to provide a constant suction to the pump:

Attributes

Action= PV-SP, High Range of Input Hi_In = 10000 kPa,

Low Range of Input Lo_In = 0 kPa

Connect the controller by dragging the Default Connector from V1 to PC1 and connect

PC1.PV to V1.P. You can find V1.P under the “Calculated Values” node

Drag the Default Connector from PC1 to PV1which will connect the PV1.Op to the

PC1.Out automatically.

Press LF to load your model changes.

Resume the simulation and change make the Setpoint of PC1= 5000 kPa

Save a snapshot when the pressure lines out at 5000 kPa.

ump between the Drum V1 and Valve LV1 to the flowsheet

Attributes

DYNSIM Tutorials

to the pump:

SP, High Range of Input Hi_In = 10000 kPa,

Connector from V1 to PC1 and connect

er the “Calculated Values” node.

the PV1.Op to the

kPa.

DYNSIM Tutorials

Pump P1

Valve LV1

Sink SNK2

Step 8 � Press LF to load your model changes.

= 5000 kPa.

� Save a snapshot

Step 9 � Add a separate flow path for the utility exchanger: Source SRC2, Valve XV2, Utility

Heat Exchanger E1

Unit Name

Source SRC2

Valve XV2

Utility Ex E1

Sink SNK3

Step 10 � Drag a heat stream from the E


P1

Flow Curve Scale Qscale = 0.1 m3/sec, Head Curve Scale

DHScale = 500 m, Efficiency Curve Scale ETAScale = 0.7,

Reverse Flow Factor KJR = 0, Use Default Curve = True

LV1 Valve Cv = 100 Cv, Reverse Flow Factor KJR = 0

SNK2 Pressure Pb = 6000 kPag

Press LF to load your model changes. Resume simulation and make the Setpo

Save a snapshot when the pressure steadies out at 5000 kPa.

Add a separate flow path for the utility exchanger: Source SRC2, Valve XV2, Utility

Heat Exchanger E1 (Heat Stream type) and Sink SNK3.

Attributes

Pressure PB = 800 kPag, Temperature Tb = 500 K,

Composition: Methane = 0.1, Ethane = 0.2, Propane = 1, N

Butane = 1

Valve Cv = 500, Reverse Flow Factor KJR = 0,

Open 20%

Metal Mass MM = 5000 kg, Volume Vol2 = 2 m3, Heat

Transfer Area = 50 m2, Constant Overall Heat Transfer

Coefficient ConstUFlag = True, Overall Heat Transfer

Coefficient U = 4 kW/m2-K

Pressure Pb = 500 kPag

Drag a heat stream from the E1 to V1. Note: Connect to the fluid heat stream port of V1.

49

Flow Curve Scale Qscale = 0.1 m3/sec, Head Curve Scale

rve Scale ETAScale = 0.7,

Reverse Flow Factor KJR = 0, Use Default Curve = True

Valve Cv = 100 Cv, Reverse Flow Factor KJR = 0

and make the Setpoint of PC1

when the pressure steadies out at 5000 kPa.

Add a separate flow path for the utility exchanger: Source SRC2, Valve XV2, Utility

Pressure PB = 800 kPag, Temperature Tb = 500 K,

Composition: Methane = 0.1, Ethane = 0.2, Propane = 1, N-

Valve Cv = 500, Reverse Flow Factor KJR = 0,

Vol2 = 2 m3, Heat

Transfer Area = 50 m2, Constant Overall Heat Transfer

Coefficient ConstUFlag = True, Overall Heat Transfer

luid heat stream port of V1.

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Step 11

� Press LF to load your model changes and resume simulation.

� Double click on valve XV2 and open the valve.

Save a snapshot when the pressure lines out at 5


LF to load your model changes and resume simulation.

Double click on valve XV2 and open the valve.

hen the pressure lines out at 5000 kPa and the V1 level is

DYNSIM Tutorials

000 kPa and the V1 level is at 1 m.

DYNSIM Training Tutorials_1-4

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