DWSIM/C2/Heat-Exchanger/English-timed - Revision history

Sandhya.np14 at 05:43, 21 June 2018

2018-06-21T05:43:12Z

Sandhya.np14 at 05:26, 21 June 2018

2018-06-21T05:26:37Z

PoojaMoolya: Created page with " {| border=1 ||'''Time''' ||'''Narration''' |- ||00:01 || Welcome to this tutorial on Simulating a '''Heat Exchanger '''in '''DWSIM'''. |- ||00:07 || In this tutorial, we wi..."

2017-10-27T10:45:33Z

Created page with " {| border=1 ||'''Time''' ||'''Narration''' |- ||00:01 || Welcome to this tutorial on Simulating a '''Heat Exchanger '''in '''DWSIM'''. |- ||00:07 || In this tutorial, we wi..."

New page

{| border=1
||'''Time'''
||'''Narration'''

|-
||00:01
|| Welcome to this tutorial on Simulating a '''Heat Exchanger '''in '''DWSIM'''.

|-
||00:07
|| In this tutorial, we will learn to: Simulate a''' Heat Exchanger'''

|-
||00:13
|| Calculate the '''Outlet stream temperatures'''

|-
||00:16
|| Calculate '''Thermal Efficiency '''and''' LMTD'''

|-
|| 00:20
|| To record this tutorial, I am using '''DWSIM 4.3 '''and '''Windows 7'''

|-
||00:28
|| The process demonstrated in this tutorial is identical in other OS also, such as-

'''Linux''', '''Mac OS X '''or '''FOSSEE OS '''on '''ARM'''.

|-
||00:40
|| To practice this tutorial, you should know how to add components to a '''flowsheet'''

|-
|| 00:47
|| Select '''thermodynamic '''packages

|-
|| 00:50
|| Add '''material '''stream''' '''and specify their properties.

|-
|| 00:54
|| The prerequisite tutorials are mentioned on our website

|-
|| 00:58
|| You can access these tutorials and all the associated files from this site.

|-
||01:04
|| We will develop a '''flowsheet '''to determine the '''Outlet stream temperatures.'''

|-
|| 01:09
|| Here we give '''Compounds '''and''' Inlet stream conditions.'''

|-
|| 01:13
|| Here we give '''Heat Exchanger''' properties and '''Property package'''.

|-
|| 01:18
|| I have already opened '''DWSIM''' on my machine.

|-
|| 01:23
|| Go to '''File '''menu and select '''New Steady-state Simulation.'''

|-
|| 01:28
|| '''Simulation Configuration Wizard '''window appears.

|-
|| 01:32
|| At the bottom, click on '''Next '''button.

|-
|| 01:36
|| Now, in the '''Compounds Search '''tab, type '''Methanol.'''

|-
||01:42
|| Select '''Methanol '''from '''ChemSep '''database.

|-
|| 01:46
|| Similarly, add '''Water'''.

|-
|| 01:49
|| At the bottom, click on '''Next '''button.

|-
|| 01:53
|| Now comes '''Property Packages.'''

|-
||01:56
|| From '''Available Property Packages''', double-click on '''Raoult’s Law.'''

|-
|| 02:01
|| Then click on '''Next '''button'''.'''

|-
|| 02:04
|| We are moved to a new window named '''Flash Algorithm'''.

|-
||02:08
|| From '''Default Flash Algorithm '''select '''Nested Loops(VLE)'''

|-
|| 02:14
|| Click on '''Next '''button'''.'''

|-
|| 02:17
|| Next option is '''System of Units.'''

|-
|| 02:21
|| Under '''System of Units''', select '''C5'''.

|-
|| 02:26
|| At the bottom, click on '''Finish '''button'''.'''

|-
|| 02:30
|| Let us maximize the simulation window for better visibility.

|-
|| 02:35
|| Now let’s insert two material stream that enter the '''Heat Exchanger'''.

|-
|| 02:41
|| On the right hand side of the main simulation window, go to '''Flowsheet Objects.'''

|-
|| 02:47
|| In the '''Filter List '''tab, type '''Material Stream.'''

|-
|| 02:52
|| From the displayed list, drag and drop a '''Material Stream '''to the '''Flowsheet'''.

|-
|| 02:58
|| Click on the '''Material Stream '''“'''MSTR-000” '''to view its properties.

|-
|| 03:04
|| Let’s change the name of this stream to '''Water In.'''

|-
|| 03:08
|| Now we will specify the '''Water In''' stream properties.

|-
|| 03:13
|| Go to '''Input Data.'''

|-
|| 03:15
|| Select '''Flash Spec '''as '''Temperature and Pressure (TP), '''if not already selected.

|-
|| 03:21
|| By default, '''Temperature and Pressure '''are already selected as '''Flash Spec.'''

|-
|| 03:27
|| Change '''Temperature '''to '''10 degC '''and press '''Enter.'''

|-
|| 03:32
|| Change '''Pressure '''to '''1 bar '''and press '''Enter'''.

|-
|| 03:37
|| Change '''Mass Flow '''to '''15000 kg per hour '''and press '''Enter'''.

|-
|| 03:44
|| Now let us specify the '''feed stream compositions'''.

|-
|| 03:49
|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected'''.'''

|-
|| 03:56
|| By default, '''Mole Fractions '''is selected as '''Basis.'''

|-
|| 04:01
|| Now for '''Methanol''', enter the '''Amount '''as '''0 '''and press '''Enter.'''

|-
|| 04:08
|| Similarly, for '''Water''', enter it as '''1 '''and press '''Enter.'''

|-
|| 04:15
|| On the right, click on this green tick to '''Accept Changes.'''

|-
|| 04:20
|| Now drag and drop another '''Material Stream '''to the flowsheet.

|-
|| 04:25
|| Click on '''Material Stream '''“'''MSTR-001” '''to view its properties.

|-
|| 04:30
|| Let’s change the name of this stream to '''Methanol In.'''

|-
|| 04:35
|| Now we will specify the '''Methanol In '''stream properties.

|-
||04:40
|| Go to '''Input Data.'''

|-
|| 04:42
|| Select '''Flash Spec''' as '''Temperature and Pressure(TP).'''

|-
|| 04:46
|| By default, '''Temperature and Pressure''' are again already selected as '''Flash Spec.'''

|-
|| 04:42
|| Change '''Temperature '''to '''80 degC '''and press '''Enter.'''

|-
|| 04:58
|| Change '''Pressure '''to '''5 bar '''and press '''Enter'''.

|-
|| 05:03
|| Change '''Mass Flow '''to '''25000 kg/h '''and press '''Enter'''.

|-
|| 05:11
|| Now let us specify the '''Methanol In''' stream compositions.

|-
|| 05:17
|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected'''.'''

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

|-
||05:29
|| Now for '''Methanol''', enter the '''Amount '''as '''1 '''and press '''Enter.'''

|-
|| 05:36
|| Similarly, for '''Water''', enter it as '''0 '''and press '''Enter.'''

|-
|| 05:43
|| On the right, click on this green tick to '''Accept Changes.'''

|-
|| 05:48
|| Now let’s insert two more material streams that exit the '''Heat Exchanger'''.

|-
|| 05:54
|| To do that, let us drag one '''Material Stream.'''

|-
|| 05:58
|| Let us now arrange it.

|-
|| 06:00
|| Leave that stream as unspecified.

|-
|| 06:03
|| We will change the name of this stream to '''Water Out.'''

|-
|| 06:07
|| Next, we will insert another '''Material Stream.'''

|-
|| 06:11
|| Let us once again arrange it.

|-
|| 06:14
|| Leave that stream as unspecified.

|-
|| 06:18
|| And name this stream as '''Methanol Out.'''

|-
|| 06:22
|| Now let us insert a '''Heat Exchanger '''into the '''flowsheet'''.

|-
|| 06:27
|| Go to the '''Flowsheet Objects'''.

|-
|| 06:30
|| In the '''Filter list '''tab, type '''Heat Exchanger.'''

|-
||06:35
|| Click on the '''Heat Exchanger '''displayed.

|-
|| 06:39
|| Drag and drop it to the '''flowsheet.'''

|-
|| 06:42
|| Let us now arrange it as required for better visibility.

|-
|| 06:47
|| We are now ready to specify the '''Heat Exchanger.''' Let's click on it.

|-
|| 06:53
|| On the left, we can see a tab called''' Property Editor Window.'''

|-
|| 06:58
|| Under '''Connections, '''click on the drop-down against '''Inlet Stream 1.'''

And select '''Methanol In.'''

|-
|| 07:07
|| Next, click on drop-down against '''Outlet Stream 1''' and select '''Methanol Out.'''

|-
||07:14
|| Then click on drop-down against '''Inlet Stream 2. '''

And select '''Water In.'''

|-
|| 07:21
|| Then click on drop-down against '''Outlet Stream 2. '''

And select '''Water Out.'''

|-
|| 07:28
|| Now go to the next section- '''Calculation Parameters.'''

|-
|| 07:32
|| Here, the first option is '''Calculation Type.'''

|-
|| 07:36
|| Click on the drop-down against '''Calculation Type.'''

|-
||07:39
|| Select '''Outlet Temperatures '''

|-
|| 07:43
|| Next, click on the drop-down against '''Flow Direction'''

Select '''Counter Current.'''

|-
|| 07:51
|| Then click on the field against '''Cold Fluid Pressure Drop '''and enter '''0.002 bar.'''

Then press '''Enter.'''

|-
|| 08:03
|| Click on the field against '''Hot Fluid Pressure Drop '''and enter it as '''0.025 bar.'''

|-
|| 08:11
|| Then press '''Enter.'''

|-
||08:15
|| Click on the field against '''Overall Heat Transfer Coefficient '''and enter it as '''450 Watt meter sqaure Kelvin'''

Then press '''Enter.'''

|-
|| 08:27
|| Click on the field against '''Heat Exchange Area '''and enter it as '''250 meter square.'''

Then press '''Enter.'''

|-
|| 08:37
|| Now we will run the '''simulation.'''

|-
|| 08:40
|| So, from the toolbar, click on '''Solve Flowsheet '''button.

|-
|| 08:45
|| When the calculations are completed, click on '''Heat Exchanger '''in the '''Flowsheet'''.

|-
|| 08:50
|| From the '''Property Editor Window '''of '''Heat Exchanger, '''locate '''Results '''section.

|-
|| 08:56
|| Check '''Thermal efficiency;''' it is '''94.5%'''. Check '''Log Mean Temperature Difference;''' it is '''10.29 degree Centigrade.'''

|-
|| 09:09
|| Now we will check the stream-wise temperature results and '''Material balance.'''

|-
|| 09:15
|| Go to '''Insert '''menu and select '''Master Property Table'''.

|-
|| 09:20
|| Double-click on '''Master Property Table '''to edit it.

|-
||09:24
|| '''Configure Master Property Table '''window opens.

|-
|| 09:28
|| Enter '''Name '''as '''Heat Exchanger – Stream Wise Results'''

|-
|| 09:33
|| Enter '''Object Type '''as '''Material Stream'''. By default, '''Material Stream '''is already selected.

|-
|| 09:40
|| So we will not change it.

|-
||09:43
|| Under '''Properties to display''', select '''Object '''as: '''Water In, Methanol In, Water Out, Methanol Out'''

|-
|| 09:54
|| Under '''Property''', scroll down to see all the parameters.

|-
|| 10:00
||Now select the properties as:

'''Temperature'''

'''Pressure'''

'''Mass Flow'''

'''Molar Flow'''

|-
|| 10:11
||'''Molar Fraction(Mixture) / Methanol'''

|-
|| 10:15
||'''Molar Fraction(Mixture) / Water'''

|-
|| 10:19
|| Close this window.

|-
|| 10:22
|| Move the '''Master Property Table '''for better visibility.

|-
|| 10:27
||Here we can see the corresponding results for '''Inlet''' and '''Outlet''' streams.

|-
|| 10:33
|| Now we will check the properties of '''Heat Exchanger.'''

|-
|| 10:37
|| Go to '''Insert '''menu and select '''Master Property Table'''.

|-
|| 10:42
|| Double-click on '''Master Property Table.'''

|-
|| 10:46
|| '''Configure Master Property Table '''window opens.

|-
|| 10:50
|| Enter '''Name '''as '''Heat Exchanger – Results.'''

|-
|| 10:55
|| Enter '''Object Type '''as '''Heat Exchanger'''.

|-
|| 10:59
|| Under '''Properties to display''', select '''Object '''as '''HE-004'''

|-
|| 11:06
|| Under '''Property''', scroll down to see all the parameters.

|-
|| 11:12
||Now select the properties as: '''Global Heat Transfer Coefficient (U)'''

|-
|| 11:17
||'''Heat Exchange Area (A)'''

'''Heat Load'''

|-
|| 11:21
||'''Cold fluid outlet temperature'''

'''Hot fluid outlet temperature'''

|-
|| 11:26
||'''Logarithmic mean temperature difference(LMTD)''' and

'''Thermal Efficiency'''

|-
|| 11:32
|| Close this window.

|-
|| 11:35
|| Move the '''Master Property Table '''for better visibility.

|-
|| 11:39
||Here we can see the corresponding results for '''Heat Exchanger.'''

|-
|| 11:43
|| Let's summarize.

|-
|| 11:45
|| In this tutorial, we have learnt to Simulate a ''' Heat Exchanger'''

|-
|| 11:50
|| Calculate the''' Outlet stream temperatures '''

|-
|| 11:53
||Calculate''' Thermal Efficiency '''and''' LMTD'''

|-
|| 11:57
|| As an assignment, Repeat this simulation with different '''Compounds, feed conditions '''and '''Thermodynamics'''.

|-
|| 12:05
|| Watch the video available at following link.

|-
|| 12:08
||It summarizes the Spoken Tutorial project.

|-
|| 12:12
|| The Spoken Tutorial Project Team, Conducts workshops and Gives certificates

For more details, please write to us.

|-
|| 12:20
|| Please post your times queries in this forum.

|-
|| 12:24
|| The '''FOSSEE '''team coordinates conversion of existing flow sheets into '''DWSIM'''.

|-
|| 12:29
||We give honorarium and certificates. For more details, please visit this site.

|-
||12:36
|| The '''FOSSEE '''team coordinates coding of solved examples of popular books.

|-
|| 12:41
||We give honorarium and certificates. For more details, please visit this site.

|-
|| 12:48
|| The '''FOSSEE '''team helps migrate commercial simulator labs to '''DWSIM.'''

|-
|| 12:54
||We give honorarium and certificates. For more details, please visit this site.

|-
|| 13:00
|| '''Spoken Tutorial '''and '''FOSSEE '''projects are funded by '''NMEICT, MHRD''', Government of India.

|-
||13:09
|| This tutorial is contributed by Kaushik Datta and Priyam Nayak.

Thanks for joining.

|}

@@ Line 350: / Line 350: @@
 |-
 ||07:14
-|| Then click on drop-down against '''Inlet Stream 2. '''
+|| Then click on drop-down against '''Inlet Stream 2 ''' and select '''Water In.'''
-−
-And select '''Water In.'''
 |-
 || 07:21
-|| Then click on drop-down against '''Outlet Stream 2. '''
+|| Then click on drop-down against '''Outlet Stream 2''' and select '''Water Out.'''
-−
-And select '''Water Out.'''
 |-
@@ Line 374: / Line 370: @@
 |-
 ||07:39
-|| Select '''Outlet Temperatures '''
+|| Select '''Outlet Temperatures.'''
 |-
 || 07:43
-|| Next, click on the drop-down against '''Flow Direction'''
+|| Next, click on the drop-down against '''Flow Direction'''. Select '''Counter Current.'''
-−
 Select '''Counter Current.'''
 |-
 || 07:51
 || Then click on the field against '''Cold Fluid Pressure Drop '''and enter '''0.002 bar.'''
 Then press '''Enter.'''
@@ Line 398: / Line 391: @@
 |-
 ||08:15
-|| Click on the field against '''Overall Heat Transfer Coefficient '''and enter it as '''450 Watt meter sqaure Kelvin'''
+|| Click on the field against '''Overall Heat Transfer Coefficient '''and enter it as '''450 Watt meter square Kelvin.'''
-−
 Then press '''Enter.'''
@@ Line 405: / Line 397: @@
 || 08:27
 || Click on the field against '''Heat Exchange Area '''and enter it as '''250 meter square.'''
 Then press '''Enter.'''
 |-
 || 08:37
-|| Now we will run the '''simulation.'''
+|| Now we will '''run''' the '''simulation.'''
 |-
@@ Line 446: / Line 437: @@
 |-
 || 09:28
-|| Enter '''Name '''as '''Heat Exchanger – Stream Wise Results'''
+|| Enter '''Name '''as '''Heat Exchanger – Stream Wise Results'''.
 |-
@@ Line 454: / Line 445: @@
 |-
 || 09:40
-|| So we will not change it.
+|| So, we will not change it.
 |-
 ||09:43
-|| Under '''Properties to display''', select '''Object '''as: '''Water In, Methanol In, Water Out, Methanol Out'''
+|| Under '''Properties to display''', select '''Object '''as: '''Water In, Methanol In, Water Out, Methanol Out'''.
 |-
 || 09:54
-|| Under '''Property''', scroll down to see all the parameters.
+|| Under '''Property''', scroll-down to see all the parameters.
 |-
@@ Line 468: / Line 459: @@
 ||Now select the properties as:
-'''Temperature'''
+'''Temperature''',
-'''Pressure'''
+'''Pressure''',
-'''Mass Flow'''
+'''Mass Flow''',
-'''Molar Flow'''
+'''Molar Flow''',
 |-
 || 10:11
-||'''Molar Fraction(Mixture) / Methanol'''
+||'''Molar Fraction(Mixture) / Methanol''',
 |-
 || 10:15
-||'''Molar Fraction(Mixture) / Water'''
+||'''Molar Fraction(Mixture) / Water'''.
 |-
@@ Line 494: / Line 485: @@
 |-
 || 10:27
-||Here we can see the corresponding results for '''Inlet''' and '''Outlet''' streams.
+||Here, we can see the corresponding results for '''Inlet''' and '''Outlet''' streams.
 |-
@@ Line 522: / Line 513: @@
 |-
 || 10:59
-|| Under '''Properties to display''', select '''Object '''as '''HE-004'''
+|| Under '''Properties to display''', select '''Object '''as '''HE-004'''.
 |-
@@ Line 530: / Line 521: @@
 |-
 || 11:12
-||Now select the properties as: '''Global Heat Transfer Coefficient (U)'''
+||Now, select the properties as: '''Global Heat Transfer Coefficient (U)''',
 |-
 || 11:17
-||'''Heat Exchange Area (A)'''
+||'''Heat Exchange Area (A)''',
+'''Heat Load''',
 '''Heat Load'''
 |-
 || 11:21
-||'''Cold fluid outlet temperature'''
+||'''Cold fluid outlet temperature''',
+'''Hot fluid outlet temperature''',
 '''Hot fluid outlet temperature'''
 |-
 || 11:26
 ||'''Logarithmic mean temperature difference(LMTD)''' and
+'''Thermal Efficiency'''.
 '''Thermal Efficiency'''
 |-
@@ Line 568: / Line 556: @@
 |-
 || 11:45
-|| In this tutorial, we have learnt to Simulate a ''' Heat Exchanger'''
+|| In this tutorial, we have learnt to: simulate a ''' Heat Exchanger''',
 |-
 || 11:50
-|| Calculate the''' Outlet stream temperatures '''
+|| calculate the''' Outlet stream temperatures, '''
 |-
 || 11:53
-||Calculate''' Thermal Efficiency '''and''' LMTD'''
+||calculate''' Thermal Efficiency '''and''' LMTD'''.
 |-
 || 11:57
-|| As an assignment, Repeat this simulation with different '''Compounds, feed conditions '''and '''Thermodynamics'''.
+|| As an assignment, repeat this simulation with different '''Compounds, feed conditions '''and '''Thermodynamics'''.
 |-
@@ Line 588: / Line 576: @@
 |-
 || 12:08
-||It summarizes the Spoken Tutorial project.
+||It summarizes the '''Spoken Tutorial''' project.
 |-
 || 12:12
-|| The Spoken Tutorial Project Team,  Conducts workshops and Gives certificates
+|| The Spoken Tutorial Project Team conducts workshops and gives certificates.
-−
 For more details, please write to us.
@@ Line 631: / Line 618: @@
 ||13:09
 || This tutorial is contributed by Kaushik Datta and Priyam Nayak.
 Thanks for joining.
 |}

@@ Line 6: / Line 6: @@
 |-
 ||00:01
-|| Welcome to this tutorial on Simulating a '''Heat Exchanger '''in '''DWSIM'''.
+|| Welcome to this tutorial on simulating a '''Heat Exchanger '''in '''DWSIM'''.
 |-
 ||00:07
-|| In this tutorial, we will learn to: Simulate a''' Heat Exchanger'''
+|| In this tutorial, we will learn to: simulate a''' Heat Exchanger''',
 |-
 ||00:13
-||  Calculate the '''Outlet stream temperatures'''
+||  calculate the '''Outlet stream temperatures''',
 |-
 ||00:16
-||  Calculate '''Thermal Efficiency '''and''' LMTD'''
+||  calculate '''Thermal Efficiency '''and''' LMTD'''.
 |-
 || 00:20
-|| To record this tutorial, I am using  '''DWSIM 4.3 '''and '''Windows 7'''
+|| To record this tutorial, I am using  '''DWSIM 4.3 '''and '''Windows 7'''.
 |-
@@ Line 28: / Line 28: @@
 || The process demonstrated in this tutorial is identical in other OS also, such as-
-'''Linux''',   '''Mac OS X '''or  '''FOSSEE OS '''on '''ARM'''.
+'''Linux''',  '''Mac OS X '''or  '''FOSSEE OS '''on '''ARM'''.
 |-
 ||00:40
-|| To practice this tutorial, you should know how to  add components to a '''flowsheet'''
+|| To practice this tutorial, you should know how to  add components to a '''flowsheet''',
 |-
 || 00:47
-||  Select '''thermodynamic '''packages
+||  select '''thermodynamic package'''s,
 |-
 || 00:50
-||   Add '''material '''stream''' '''and specify their properties.
+||   add '''material stream''' and specify their properties.
 |-
 || 00:54
-|| The prerequisite tutorials are mentioned on our website
+|| The prerequisite tutorials are mentioned on our website.
 |-
@@ Line 56: / Line 56: @@
 |-
 || 01:09
-|| Here we give '''Compounds '''and''' Inlet stream conditions.'''
+|| Here, we give '''Compounds '''and''' Inlet stream conditions.'''
 |-
 || 01:13
-|| Here we give '''Heat Exchanger''' properties and '''Property package'''.
+|| Here, we give '''Heat Exchanger''' properties and '''Property package'''.
 |-
@@ Line 104: / Line 104: @@
 |-
 || 02:01
-|| Then click on '''Next '''button'''.'''
+|| Then click on '''Next '''button.
 |-
@@ Line 112: / Line 112: @@
 |-
 ||02:08
-|| From '''Default Flash Algorithm '''select '''Nested Loops(VLE)'''
+|| From '''Default Flash Algorithm, '''select '''Nested Loops(VLE).'''
 |-
 || 02:14
-|| Click on '''Next '''button'''.'''
+|| Click on '''Next '''button.
 |-
@@ Line 128: / Line 128: @@
 |-
 || 02:26
-|| At the bottom, click on '''Finish '''button'''.'''
+|| At the bottom, click on '''Finish '''button.
 |-
 || 02:30
-|| Let us maximize the simulation window for better visibility.
+|| Let us maximize the '''simulation window''' for better visibility.
 |-
 || 02:35
-|| Now let’s insert two material stream that enter the '''Heat Exchanger'''.
+|| Now, let’s insert two '''material stream''' that enter the '''Heat Exchanger'''.
 |-
@@ Line 152: / Line 152: @@
 |-
 || 02:58
-|| Click on the '''Material Stream '''“'''MSTR-000” '''to view its properties.
+|| Click on the '''Material Stream''' “'''MSTR-000” '''to view its properties.
 |-
@@ Line 188: / Line 188: @@
 |-
 || 03:44
-|| Now let us specify the '''feed stream compositions'''.
+|| Now, let us specify the '''feed stream compositions'''.
 |-
 || 03:49
-|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected'''.'''
+|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected.
 |-
@@ Line 212: / Line 212: @@
 |-
 || 04:20
-|| Now drag and drop another '''Material Stream '''to the flowsheet.
+|| Now drag and drop another '''Material Stream '''to the '''flowsheet'''.
 |-
 || 04:25
-|| Click on '''Material Stream '''“'''MSTR-001” '''to view its properties.
+|| Click on '''Material Stream''' “'''MSTR-001” '''to view its properties.
 |-
@@ Line 252: / Line 252: @@
 |-
 || 05:11
-|| Now let us specify the '''Methanol In''' stream compositions.
+|| Now, let us specify the '''Methanol In''' stream compositions.
 |-
 || 05:17
-|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected'''.'''
+|| Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected.
-−
 By default, '''Mole Fractions '''is selected as '''Basis.'''
@@ Line 274: / Line 273: @@
 |-
 || 05:48
-|| Now let’s insert two more material streams that exit the '''Heat Exchanger'''.
+|| Now, let’s insert two more '''material stream'''s that exit the '''Heat Exchanger'''.
 |-
@@ Line 302: / Line 301: @@
 |-
 || 06:14
-|| Leave that stream as unspecified.
+|| Leave that '''stream''' as unspecified.
 |-
@@ Line 310: / Line 309: @@
 |-
 || 06:22
-|| Now let us insert a '''Heat Exchanger '''into the '''flowsheet'''.
+|| Now, let us insert a '''Heat Exchanger '''into the '''flowsheet'''.
 |-
@@ Line 343: / Line 342: @@
 || 06:58
 || Under '''Connections, '''click on the drop-down against '''Inlet Stream 1.'''
 And select '''Methanol In.'''