ASPEN HYSYS TUTORIAL - · PDF filefrom HYSYS databanks Define an appropriate thermodynamic...

ASPEN HYSYS TUTORIAL

PROCESS DEVELOPMENT ENGINEERING

7TH SEMESTER

BEFORE THE SIMULATION

• Create a list of components

• Select an appropriate thermodynamic model

Start a new simulation by

clicking on “New Case”

MODIFY UNIT SETS

Select Tools>Preferences

In the menu toolbar

You can also define

independently units for a

specific variable

You can change the

number of decimal points

in the “Formats” tab

PREPARING THE PFD

✓Insert appropriate streams (mass or energy)

PREPARING THE PFD


Heater Valve Pump Mixer Heat Exchanger

✓Insert appropriate units

PREPARING THE PFD


Pump

Separator (flash)

Distillation Column

Absorber Column


✓Insert appropriate conditions

PREPARING THE PFD


Heater Valve


• Temperature• Pressure• Flow• Degrees of Freedom

Define the components

from HYSYS databanks

Define an appropriate

thermodynamic model to

calculate the fluid properties

You can define hypothetical

components from correlations

by defining specific properties,

eg. Tb, MW

Click “Add” to insert the

thermodynamic model

✓ The selection of the model depends on the specific process.

✓ If in doubt, you can consult “Methods Assistant”

Selection of

assumptions

Modify

Interaction

Parameters

OBJECT PALETTE

Material Stream Energy Stream

Separator Compressor

Heater

Expander

Heat Exchanger

Pump

Valve Mixer

Distillation Column

Absorber Column

AdjustRecycle

Set

Spreadsheet

MATERIAL STREAMS

ADD STREAMS AND UNITS

From menu “Flowsheet” in the toolbar select “Add stream” or “Add operation”

From the “Tools” menu in the toolbar, select “Workbook”

Using the Object Palette

Alternatively, you can use F11 (to add stream) and F12 (to insert operation).

MATERIAL STREAM - DEFINITIONS

Double Click on the selected stream


Define conditions by typing in <empty>

Yellow color indicates undefined variables!

Click on “Composition” tab to define composition



Define compositions by typing in <empty>

You can select the input and output type of composition by selecting the tab “Basis”



Define compositions by typing in <empty>

You can select the input and output type of composition by selecting the tab “Basis”

When all required input is complete the bar turns green

Blue color indicates values defined by user,Black calculated from the models

MATERIAL STREAM - PROPERTIES

You can add more properties by clicking

on the + button



on the + button

You can select the kind of property you want to add depending on the use of interest, eg. Gas



on the + button

A list of available properties appears. You

can add a specific property by selecting it and then click on the

Apply button



on the + button

The property is now added

MATERIAL STREAM - UTILITIES

Click on the attachments tab

Click on the “Utilities” tab

MATERIAL STREAM - UTILITIES

Click on the attachments tab

Click on the “Utilities” tab

Click on the “Create…” button to insert “Envelope” utility

AUXILLIARY UNITS

HEAT EXCHANGER

Heat Exchanger

HEAT EXCHANGER

Heat Exchanger

From menu “Connections” define the streams exchanging energy

You can change the thermodynamic package independently for this unit

Shell

sideTube

side

HEAT EXCHANGER

Heat Exchanger



Shell

sideTube

side

Click on the “Parameters” tab to define pressure drop and exchanger typeYou can define different pressure drop

for shell and tube side

Click on the “Performance” tab to find the simulation results

HEAT EXCHANGER

Heat Exchanger



Shell

sideTube

side

Click on the “Parameters” tab to define pressure drop and exchanger type

You can define different pressure drop for shell and tube side

HEAT EXCHANGER

Heat Exchanger



Shell

sideTube

side

Click on the “Parameters” tab to define pressure drop and exchanger typeYou can define different pressure drop

for shell and tube side

Click on the “Performance” tab to find the simulation results

HEATER/COOLER

Heater

HEATER/COOLER

Undefined product streams!

You can select a different model for part of the simulation

HEATER/COOLER

Unknown heat duty or undefined temperature of stream 2

SEPARATOR

You can add optional energy stream

Define T, P

VALVES

Pressure drop or pressure of outlet stream 2 must be defined

EXPANDER

An energy stream must be defined

EXPANDER

An energy stream must be defined

Define efficiency

COMPRESSOR

Define connections, energy stream and fluid package

MIXER

Insert inlet streams

Insert outlet streams

MIXER

Insert inlet streams

Insert outlet streamsYou can determine the

pressure assignment

PUMPS

You can either determine the pump

duty or the pressure of the outlet stream S8

PUMPS

You can either determine the pump

duty or the pressure of the outlet stream S8

Define pump adiabatic efficiency

LOGICAL OPERATORS

ADJUST

On the “select var..” tab choose manipulated variable

ADJUST


Define object

ADJUST

On the “select var..” tab choose object variable

ADJUST


Define object

On the “select var..” tab choose object variable

Specify target variable value

You can adjust several parameters, such as method,

tolerance, step size…

You can adjust the number of iterations

SET

Define object variable

SET


Define source

SET

Define source

SET


Define source

RECYCLE

On the parameters tab

RECYCLE


Define sensitivity

RECYCLE


Define sensitivity

You can adjust the number of iterations

SPREADSHEET

Double click on the spreadsheet icon to open spreadsheet window

SPREADSHEET

Click on “Add import” to specify

input variable, e.g. component

mass flow

SPREADSHEET



mass flow

Select the appropriate stream

and variable, depending on

the task in hand

SPREADSHEET



mass flow

After the definition of the import variables,

go to the spreadsheet tab

Define the appropriate formula between

input and output cells!

SPREADSHEET



mass flow The calculated result is

displayed in red color

SPREADSHEET



mass flow



The calculated result is


Get back to “Connections” tab, to define

which variable has been calculated by

clicking on “Add Export..”

SPREADSHEET

Double click on the spreadsheet icon to open spreadsheet window



mass flow

Select the appropriate stream

and variable, depending on

the task in hand



Define the appropriate formula between

input and output cells!

The calculated result is


Get back to “Connections” tab, to define

which variable has been calculated by

clicking on “Add Export..”

SPREADSHEET



mass flow

DISTILLATION DESIGN

DISTILLATION DESIGN (1/7)

By double clicking on the column the following wizard appears


Insert number of stages


Select on or more feed stages by drag and drop existing streams or defining new ones

Select condenser type

Insert energy streams

Insert outlet streams

You can also define (optionally) more

outlet streamsWhen all parameters are defined,

click on the “Next” button




Select condenser typeInsert energy

streams


outlet streams

Reboiler configuration





streams


outlet streams


When all parameters are defined, click on the “Next” button


Define condenser and Reboiler pressure

If needed, define pressure drop in

condenser and reboiler





streamsInsert outlet

streams


outlet streams







You can give optional initial estimates for the

temperature to help convergence





streamsInsert outlet

streams


outlet streams







You can give optional initial estimates for the

temperature to help convergence

Depending on the process, you

can define reflux ratio or side

ops

The input procedure is completed by clicking on

“Done..” button


You can change feed stage and number of stages depending on the problem at hand.

In order to be able to Run the column

and to obtain convergence, some

specifications must be defined.


You can define specification value

by selecting the “View” button, or by

manually changing the value


Depending on the defined

specs, the degrees of

freedom are calculated

You can add or remove

specification depending on

the problem

DISTILLATION DESIGN (5/7)Attention!!!

Solver must be

active

To start the calculations and solve the case,

click on “Run” button

If the status remains

“unconverged”

(with solver active),

Go to “Parameters” tab


Depending on the problem, you can

change the solving method,

tolerance, number of iterations, to

obtain convergence.

When the status gets to “Converged” you can

check the calculation results


To recalculate, eg by changing number of stages, we click on the “Reset”

button, do the required changes (e.g. stage number) and then click on “Run”,

after changing the solver to “Active”.

GENERAL

After the solution, the material streams get a dark color and the units a

black contour.

Yellow color indicates unsolved unit operation, or missing input parameters

ABSORBER

ABSORBER DESIGN (1/2)

Top and bottom inlets must be defined

Number of stages or packing characteristics must be defined


Top and bottom outlets must be defined


Define top and bottom stage pressure

On the next step, you can add optional

temperature estimates.

Don’t forget to click on the “Run” button

GOOD LUCK!

ASPEN HYSYS TUTORIAL - · PDF filefrom HYSYS databanks Define an appropriate thermodynamic...

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Transcript of ASPEN HYSYS TUTORIAL - · PDF filefrom HYSYS databanks Define an appropriate thermodynamic...