View source for DWSIM/C2/Heat-Exchanger/English


{| border=1
||'''Visual Cue'''
||'''Narration'''

|-
|| '''Slide Number 1
'''Title Slide'''
|| Welcome to this tutorial on Simulating a '''Heat Exchanger '''in '''DWSIM'''.

|-
|| '''Slide Number 2
'''Learning Objective'''
|| In this tutorial, we will learn to:


* Simulate a''' Heat Exchanger'''

* Calculate the '''Outlet stream temperatures'''

* Calculate '''Thermal Efficiency '''and''' LMTD'''

|-
|| '''Slide Number 3
'''System Requirements'''
|| To record this tutorial, I am using

* '''DWSIM 4.3 '''and

* '''Windows 7'''

The process demonstrated in this tutorial is identical in other OS also, such as-

*  '''Linux''', 

*  '''Mac OS X '''or 

*  '''FOSSEE OS '''on '''ARM'''.

|-
|| '''Slide Number 4'''

'''Pre-requisites '''
|| To practice this tutorial, you should know how to

*  add components to a '''flowsheet'''
*  select '''thermodynamic '''packages and
*  add '''material '''stream''' '''and specify their properties.

|-
|| '''Slide Number 5'''


'''Prerequisite Tutorials and Files'''
|| The prerequisite tutorials are mentioned on our website, '''spoken-tutorial.org'''


You can access these tutorials and all the associated files from this site.

|-
|| '''Slide Number 6'''


'''Compounds '''and''' Inlet Condition'''


Cold Stream: Water

Hot Stream: Methanol


'''Cold Inlet Stream:'''


Mass Flow: 15000 kg/h

Mole Fraction(CH<sub>3</sub>OH): 0

Mole Fraction(H<sub>2</sub>O): 1

Temperature: 10 degree C 

Pressure: 1 bar


'''Hot Inlet Stream:'''


Mass Flow: 25000kg/h

Mole Fraction(CH<sub>3</sub>OH): 1

Mole Fraction(H<sub>2</sub>O): 0

Temperature: 80 degree C 

Pressure: 5 bar
|| We will develop a '''flowsheet '''to determine the '''Outlet stream temperatures.'''

Here we give '''Compounds '''and''' Inlet stream conditions.'''

|-
|| '''Slide Number 6'''


'''Heat Exchanger Properties'''


Flow type: Counter-Current

<nowiki>Overall Heat Transfer Coefficient: 450 W/[m</nowiki><sup>2</sup>.K]

Heat Exchanger Area: 250 m<sup>2</sup>

Cold Fluid Pressure Drop: 0.002 bar

Hot Fluid Pressure Drop: 0.025 bar

Property Package: Raoult’s Law
|| Here we give '''Heat Exchanger''' properties and '''Property package'''.

|-
|| 
|| I have already opened '''DWSIM''' on my machine. 

|-
|| File >>'''New Steady-state Simulation '''
|| Go to '''File '''menu and select '''New Steady-state Simulation.'''

|-
|| Point to '''Simulation Configuration Wizard '''window
|| '''Simulation Configuration Wizard '''window appears.

|-
|| Click on '''Next'''.
|| At the bottom, click on '''Next '''button.

|-
|| Type '''Methanol '''in the '''Search '''tab
|| Now, in the '''Compounds Search '''tab, type '''Methanol.'''

|-
|| '''ChemSep '''database >>'''Methanol'''
|| Select '''Methanol '''from '''ChemSep '''database.

|-
|| '''Type Water '''in the '''Search '''tab
|| Similarly, add '''Water'''.

|-
|| Click on '''Next.'''
|| At the bottom, click on '''Next '''button.

|-
|| Point to''' Property Packages'''
|| Now comes '''Property Packages.'''

|-
|| '''Property Packages'''>> '''Available Property Package'''

Double click on '''Raoult’s Law'''
|| From '''Available Property Package '''list, double-click on '''Raoult’s Law.'''

|-
|| Click on''' Next.'''
|| Then click on '''Next '''button'''.'''

|-
|| Point to''' Flash Algorithm'''
|| We are moved to a new window named '''Flash Algorithm'''.

|-
|| '''Default Flash Algorithm '''>>'''Nested Loops (VLE)'''
|| From '''Default Flash Algorithm '''select '''Nested Loops(VLE)'''

|-
|| Click '''Next'''
|| Click on '''Next '''button'''.'''

|-
|| Point to''' System of Units'''
|| Next option is '''System of Units.'''

|-
|| '''System of Units >> C5'''
|| Under '''System of Units''', select '''C5'''.

|-
|| Click on''' Finish'''
|| At the bottom, click on '''Finish '''button'''.'''

|-
|| 
|| Let us maximize the simulation window for better visibility.

|-
|| 
|| Now let’s insert two material streams that enter the '''Heat Exchanger'''.

|-
|| Point to '''Flowsheet Objects.'''
|| On the right hand side of the main simulation window, go to '''Flowsheet Objects.'''

|-
|| In the''' Filter List '''tab, type '''Material Stream'''
|| In the '''Filter List '''tab, type '''Material Stream.'''

|-
|| Click and drag '''Material Stream '''to the flowsheet
|| From the displayed list, drag and drop a '''Material Stream '''to the '''Flowsheet'''.

|-
|| Click on '''MSTR-000'''
|| Click on '''Material Stream '''“'''MSTR-000” '''to view its properties.

|-
|| Type '''Water In'''
|| Let’s change the name of this '''stream '''to '''Water In.'''

|-
|| 
|| Now we will specify the '''Water In stream '''properties.

|-
|| '''Input Data>>Flash Spec>>Temperature and Pressure(TP)'''
|| Go to '''Input Data.'''


Select '''Flash Spec '''as '''Temperature and Pressure (TP), '''if not already selected.


By default, '''Temperature and Pressure '''are already selected as '''Flash Spec.'''

|-
|| '''Input Data >>Temperature >>10C'''

Press '''Enter'''
|| Change '''Temperature '''to '''10 degC '''and press '''Enter.'''

|-
|| '''Input Data >>Pressure >>1bar'''

Press '''Enter'''
|| Change '''Pressure '''to '''1 bar '''and press '''Enter'''.

|-
|| '''Input Data >>Mass Flow >>15000kg/h'''

Press '''Enter'''
|| Change '''Mass Flow '''to '''15000 kg/h '''and press '''Enter'''.

|-
|| 
|| Now let us specify the '''feed stream compositions'''.

|-
|| '''Composition >>Basis >>Mole Fractions'''
|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected'''.'''


By default, '''Mole Fractions '''is selected as '''Basis.'''

|-
|| '''Methanol: 0'''


|| Now for '''Methanol''', enter the '''Amount '''as '''0 '''and press '''Enter.'''

|-
|| '''Water: 1'''
|| Similarly, for '''Water''', enter it as '''1 '''and press '''Enter.'''

|-
|| Click '''Accept Changes'''
|| On the right, click on this green tick to '''Accept Changes.'''

|-
|| 
|| Now drag and drop another '''Material Stream '''to the flowsheet.

|-
|| Click on '''MSTR-000'''
|| Click on '''Material Stream '''“'''MSTR-001” '''to view its properties.

|-
|| Type '''Methanol In'''
|| Let’s change the name of this '''stream '''to '''Methanol In.'''

|-
|| 
|| Now we will specify the '''Methanol In '''stream properties.

|-
|| '''Input Data>>Flash Spec>>Temperature and Pressure(TP)'''
|| Go to '''Input Data.'''


'''S'''elect '''Flash Spec '''as '''Temperature and Pressure (TP).'''


By default, '''Temperature and Pressure '''are again already selected as '''Flash Spec.'''

|-
|| '''Input Data >>Temperature >> 80 degC'''

Press '''Enter'''
|| Change '''Temperature '''to '''80 degC '''and press '''Enter.'''

|-
|| '''Input Data >>Pressure >>5 bar'''

Press '''Enter'''
|| Change '''Pressure '''to '''5 bar '''and press '''Enter'''.

|-
|| '''Input Data >>Mass Flow >>25000 kg/h'''

Press '''Enter'''
|| Change '''Mass Flow '''to '''25000 kg/h '''and press '''Enter'''.

|-
|| 
|| Now let us specify the '''Methanol In stream compositions'''.

|-
|| '''Composition >>Basis >>Mole Fractions'''
|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected'''.'''


By default, '''Mole Fractions '''is selected as '''Basis.'''

|-
|| '''Methanol: 1'''



|| Now for '''Methanol''', enter the '''Amount '''as '''1 '''and press '''Enter.'''

|-
|| '''Water: 0'''
|| Similarly, for '''Water''', enter it as '''0 '''and press '''Enter.'''

|-
|| Click '''Accept Changes'''
|| On the right, click on this green tick to '''Accept Changes.'''

|-
|| 
|| Now let’s insert two more material streams that exit the '''Heat Exchanger'''.

|-
|| Click and Drag '''Material Stream '''to the flowsheet
|| To do that, let us drag one '''Material Stream.'''

|-
|| 
|| Let us now arrange it.

|-
|| 
|| Leave that stream as unspecified.

|-
|| Type '''Water Out'''
|| We will change the name of this '''stream '''to '''Water Out.'''

|-
|| Click and drag''' Material Stream '''to the flowsheet
|| Next, we will insert another '''Material Stream.'''

|-
|| 
|| Let us once again arrange it.

|-
|| 
|| Leave that stream as unspecified.

|-
|| Type''' Methanol Out'''
|| And name this '''stream '''as '''Methanol Out.'''

|-
|| 
|| Now let us insert a '''Heat Exchanger '''into the '''flowsheet'''.

|-
|| Go to '''Flowsheet Objects'''
|| Go to '''Flowsheet Objects'''.

|-
|| In the '''Filter list '''tab, type '''Heat Exchanger.'''
|| In the '''Filter list '''tab, type '''Heat Exchanger.'''

|-
|| Click and drag '''Heat Exchanger '''to the flowsheet
|| Click on the '''Heat Exchanger '''displayed.


Drag and drop it to the '''flowsheet.'''

|-
|| 
|| Let us now arrange it as required for better visibility.

|-
|| Click '''Heat Exchanger'''
|| We are now ready to specify the '''Heat Exchanger.'''


Let's click on it.

|-
|| 
|| On the left, we can see a tab called''' Property Editor Window.'''

|-
|| Go to''' Connections'''


Click on drop down arrow against''' Inlet Stream 1'''


Select '''Methanol In.'''
|| Under '''Connections, '''click on the drop-down against '''Inlet Stream 1.'''


And select '''Methanol In.'''

|-
|| Click on drop down arrow against''' Outlet Stream 1'''


Select '''Methanol Out.'''
|| Next, click on the drop-down against '''Outlet Stream 1.'''


And select '''Methanol Out.'''

|-
|| Click on the drop down against''' Inlet Stream 2'''


Select '''Water In.'''
|| Then click on the drop-down against '''Inlet Stream 2. '''


And select '''Water In.'''

|-
|| Click on the drop down against''' Outlet Stream 2'''


Select '''Water Out.'''
|| Then click on the drop-down against '''Outlet Stream 2. '''


And select '''Water Out.'''

|-
|| Hover mouse at''' Calculation Parameters'''
|| Now go to the next section- '''Calculation Parameters.'''

|-
|| 
|| Here, the first option is '''Calculation Type.'''

|-
|| Click drop down against '''Calculation Type'''
|| Click on the drop-down against '''Calculation Type.'''

|-
|| Select '''Outlet Temperatures (UA) '''
|| Select '''Outlet Temperatures (UA) '''

|-
|| Click drop down against '''Flow Direction.'''


Select '''Counter Current'''
|| Next, click on the drop-down against '''Flow Direction'''


Select '''Counter Current.'''

|-
|| '''Cold Fluid Pressure Drop'''>>'''0.002 bar'''


Press '''Enter'''
|| Then click on the field against '''Cold Fluid Pressure Drop '''and enter '''0.002 bar.'''


Then press '''Enter.'''

|-
|| '''Hot Fluid Pressure Drop>>0.025bar'''


|| Click on the field against '''Hot Fluid Pressure Drop '''and enter it as '''0.025 bar.'''

|-
|| '''Press Enter'''
|| Then press '''Enter.'''

|-
|| '''<nowiki>Overall Heat Transfer Coefficient >>450W/[m</nowiki><sup>2</sup>.K]'''


Press '''Enter'''
|| Click on the field against '''Overall Heat Transfer Coefficient '''and enter it as '''<nowiki>450W/[m</nowiki><sup>2</sup>.K]'''


Then press '''Enter.'''

|-
|| '''Heat Exchanged Area>>250 m<sup>2'''</sup>


Press '''Enter'''
|| Click on the field against '''Heat Exchanged Area '''and enter it as '''250 m<sup>2</sup>.'''


Then press '''Enter.'''

|-
|| 
|| Now we will run the '''simulation.'''

|-
|| Click '''Solve Flowsheet'''
|| So, from the toolbar, click on '''Solve Flowsheet '''button.

|-
|| Click '''Heat Exchanger'''
|| When the calculations are completed, click on '''Heat Exchanger '''in the '''Flowsheet'''.

|-
|| Hover mouse at''' Results'''
|| From the '''Property Editor Window '''of '''Heat Exchanger, '''locate '''Results '''section.

|-
|| '''Results >>General'''
|| Under '''General''' tab, check '''Thermal efficiency;''' it is '''94.5%'''


Check '''Log Mean Temperature Difference;''' it is '''10.29 degree C.'''

|-
|| 
|| Now we will check the '''stream-'''wise temperature results and '''Material balance.'''

|-
|| '''Insert >>Master Property Table'''
|| Go to '''Insert '''menu and select '''Master Property Table'''.

|-
|| Double click on''' Master Property Table'''
|| Double-click on the '''Master Property Table '''to edit it.

|-
|| Point to '''Configure Master Property Table'''
|| '''Configure Master Property Table '''window opens.

|-
|| Type '''Heat Exchanger – Stream Wise Results'''
|| Enter '''Name '''as '''Heat Exchanger – Stream Wise Results'''

|-
|| '''Object Type >>Material Stream'''
|| Enter '''Object Type '''as '''Material Stream'''.


By default, '''Material Stream '''is already selected.

|-
|| 
|| So we will not change it.

|-
|| '''Object >>Methanol Out, Water Out, Methanol In and Water In.'''
|| Under '''Properties to display''', select '''Object '''as:


'''Methanol Out, Water Out, Methanol In '''and '''Water In'''

|-
|| '''Configure Master Property Table>>Property'''
|| Under '''Property''', scroll down to see all the parameters.


Now select the properties as:


'''Temperature'''

'''Pressure'''

'''Mass Flow'''

'''Molar Flow'''

'''Molar Fraction(Mixture) / Methanol'''

'''Molar Fraction(Mixture) / Water'''

|-
|| Close this window.
|| Close this window.

|-
|| 
|| Move the '''Master Property Table '''for better visibility.


Here we can see the corresponding results for '''Inlet '''and '''Outlet streams.'''

|-
|| 
|| Now we will check the properties of '''Heat Exchanger.'''

|-
|| '''Insert >>Master Property Table'''
|| Go to '''Insert '''menu and select '''Master Property Table'''.

|-
|| Double click on''' Master Property Table'''
|| Double-click on the '''Master Property Table.'''

|-
|| Point to '''Configure Master Property Table'''
|| '''Configure Master Property Table '''window opens.

|-
|| Type '''Heat Exchanger – Results'''
|| Enter '''Name '''as '''Heat Exchanger – Results.'''

|-
|| '''Object Type >>Material Stream'''
|| Enter '''Object Type '''as '''Heat Exchanger'''.

|-
|| '''Object >>HE-004.'''
|| Under '''Properties to display''', select '''Object '''as '''HE-004'''

|-
|| '''Configure Master Property Table>>Property'''
|| Under '''Property''', scroll down to see all the parameters.


Now select the properties as:


'''Global Heat Transfer Coefficient (U)'''

'''Heat Exchange Area (A)'''

'''Heat Load'''

'''Cold fluid outlet temperature'''

'''Hot fluid outlet temperature'''

'''Logarithmic mean temperature difference LMTD'''

'''Thermal Efficiency'''

|-
|| Close this window.
|| Close this window.

|-
|| 
|| Move the '''Master Property Table '''for better visibility.


Here we can see the corresponding results for '''Heat Exchanger.'''

|-
|| 
|| Let's summarize.

|-
|| '''Slide Number 7'''


'''Summary'''
|| In this tutorial, we have learnt to


Simulate a''' Heat Exchanger'''
Calculate the''' Outlet stream temperatures '''
Calculate''' Thermal Efficiency '''and''' LMTD'''

|-
|| '''Slide Number 8'''


'''Assignment'''


'''Compounds and Inlet Condition'''


'''Cold Stream:''' Toluene

'''Hot Stream:''' Acetone


'''Cold Inlet Stream:'''


Mass Flow: 30000 lb/hr

Mole Fraction(C<sub>3</sub>H<sub>6</sub>O): 0

Mole Fraction(C<sub>6</sub>H<sub>5</sub>-CH<sub>3</sub>): 1

Temperature: 100 degree F

Pressure: 1 bar


'''Hot Inlet Stream:'''


Mass Flow: 15000 lb/hr

Mole Fraction(C<sub>3</sub>H<sub>6</sub>O): 1

Mole Fraction(C<sub>6</sub>H<sub>5</sub>-CH<sub>3</sub>): 0

Temperature: 200 degree F 

Pressure: 5 bar


'''Heat Exchanger Properties'''


Flow type: Counter-Current

<nowiki>Overall Heat Transfer Coefficient: 270 W/[m</nowiki><sup>2</sup>.K]

Heat Exchanger Area: 75 m<sup>2</sup>

Cold Fluid Pressure Drop: 0.0035 bar

Hot Fluid Pressure Drop: 0.0025 bar

Property Package: Raoult’s Law



|| As an assignment,


Repeat this simulation with different '''Compounds, feed conditions '''and '''Thermodynamics'''.

|-
|| '''Slide Number 9'''

'''About the Spoken Tutorial Project'''
|| Watch the video available at following link.

'''http://spoken-tutorial.org/ '''

It summarizes the Spoken Tutorial project.

|-
|| '''Slide Number 10'''

'''Spoken Tutorial Workshops'''
| style="background-color:#ffffff;border:0.5pt solid #000001;padding-top:0in;padding-bottom:0in;padding-left:0.0736in;padding-right:0.0736in;"| The Spoken Tutorial Project Team

Conducts workshops and
Gives certificates
For more details, please write to contact@spoken-tutorial.org



|-
|| '''Slide Number 11'''


'''Forum Slide'''


Do you have questions in this '''Spoken Tutorial?'''

Please visit this site 

Choose the minute and second where you have the question. 

Explain your question briefly. 

Someone from the FOSSEE team will answer them. 
|| Please post your times queries in this forum. 

|-
|| '''Slide Number 12
'''DWSIM Flowsheeting Project'''


|| The '''FOSSEE '''team coordinates conversion of existing flow sheets into '''DWSIM'''.

We give honorarium and certificates.

For more details, please visit this site.

|-
|| '''Slide Number 13
'''Lab Migration Project'''
|| The '''FOSSEE '''team helps migrate commercial simulator labs to '''DWSIM.'''


We give honorarium and certificates.


For more details, please visit this site

|-
|| '''Slide Number 14
'''TextBook Companion Project'''
|| The '''FOSSEE '''team coordinates coding of solved examples of popular books.


We give honorarium and certificates .


For more details, please visit this site.

|-
|| '''Slide Number 15
'''Acknowledgements'''
|| '''Spoken Tutorial '''and '''FOSSEE '''projects are funded by '''NMEICT, MHRD''', Government of India.

|-
|| '''Slide Number 16
'''Thanks'''
|| This tutorial is contributed by Kaushik Datta and Priyam Nayak.


Thanks for joining.

|}