DWSIM/C2/Shell-and-Tube-Heat-Exchanger/English-timed

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Time Narration
00:01 Welcome to this tutorial on Simulating a Shell & Tube Heat Exchanger in DWSIM.
00:07 In this tutorial, we will learn to:
00:11 Simulate a Shell & Tube Heat Exchanger
00:14 Calculate the Outlet stream temperatures
00:17 Calculate Overall Heat Transfer Coefficient
00:20 Calculate Heat Exchange Area
00:23 Calculate Thermal Efficiency and LMTD
00:27 To record this tutorial, I am using DWSIM 4.3 and Windows 7
00:36 The process demonstrated in this tutorial is identical in other OS also, such as-

Linux, Mac OS X or FOSSEE OS on ARM.

00:48 To practice this tutorial, you should know how to add components to a flowsheet
00:55 Select thermodynamic packages and add material stream and specify their properties.
01:03 The prerequisite tutorials are mentioned on our website.
01:08 You can access these tutorials and all the associated files from this site.
01:14 Here, we will develop a flowsheet to determine: Outlet stream temperatures
01:19 Overall Heat Transfer coefficient and Heat Exchange area.
01:24 Here we give Compounds and Inlet stream conditions.
01:29 Here we give Heat Exchanger properties and Property package.
01:34 Here we give Shell & Tube Heat Exchanger Properties.
01:39 I have already opened DWSIM on my machine.
01:44 Go to File menu and select New Steady-state Simulation.
01:50 Simulation Configuration Wizard window appears.
01:54 At the bottom, click on Next.
01:57 Now, in the Compounds Search tab, type Methanol.
02:03 Select Methanol from ChemSep database.
02:07 Similarly, add Water.
02:11 At the bottom, click on Next
02:14 Now comes Property Packages.
02:18 From the Available Property Packages, double-click on Raoult’s Law.
02:24 Then click on Next button.
02:28 We are moved to a new window named Flash Algorithm.
02:33 From Default Flash Algorithm select Nested Loops(VLE)
02:39 Click on Next button.
02:42 Next option is System of Units.
02:46 Under System of Units, select C5.
02:51 At the bottom, click on Finish button.
02:55 Let us maximize the simulation window for better visibility.
03:00 Now let’s insert two material streams that enter the Heat Exchanger.
03:06 On the right hand side of the main simulation window, go to Flowsheet Objects.
03:12 In the Filter List tab, type Material Stream.
03:17 From the displayed list, drag and drop a Material Stream to the Flowsheet.
03:23 Click on MSTR-000 to view its properties.
03:29 Let’s change the name of this stream to Water In.
03:34 Now we will specify the Water In stream properties.
03:40 Go to Input Data.
03:43 Select Flash Spec as Temperature and Pressure (TP), if not already selected.
03:50 By default, Temperature and Pressure are already selected as Flash Spec.
03:56 Change Temperature to 10 degree Centigrade and press Enter.
04:02 Change Pressure to 1 bar and press Enter.
04:08 Change Mass Flow to 15000 kg/h and press Enter.
04:16 Now let us specify the feed stream compositions.
04:21 Under Composition, choose the Basis as Mole Fractions, if not already selected.
04:29 By default, Mole Fractions is selected as Basis.
04:34 Now for Methanol, enter the Amount as 0 and press Enter.
04:42 Similarly, for Water, enter it as 1 and press Enter.
04:50 On the right, click on this green tick to Accept Changes.
04:55 Now drag and drop another Material Stream to the flowsheet.
05:01 Click on Material Stream MSTR-001” to view its properties.
05:08 Let’s change the name of this stream to Methanol In.
05:13 Now we will specify the Methanol In stream properties.
05:19 Go to Input Data. Select Flash Spec as Temperature and Pressure (TP).
05:26 By default, Temperature and Pressure are again already selected as Flash Spec.
05:33 Change Temperature to 80 degC and press Enter.
05:40 Change Pressure to 5 bar and press Enter.
05:46 Change Mass Flow to 25000 kg/h and press Enter.
05:55 Now let us specify the Methanol In stream compositions.
06:01 Under Composition, choose the Basis as Mole Fractions, if not already selected.
06:09 By default, Mole Fractions is selected as Basis.
06:14 Now for Methanol, enter the Amount as 1 and press Enter.
06:22 Similarly, for Water, enter it as 0 and press Enter.
06:30 On the right, click on this green tick to Accept Changes.
06:35 Now let’s insert two more material streams that exit the Heat Exchanger.
06:41 To do that, let us drag one Material Stream.
06:45 Let us now arrange it.
06:48 Leave that stream as unspecified.
06:52 We will change the name of this stream to Water Out.
06:57 Next, we will insert another Material Stream.
07:01 Let us once again arrange it.
07:04 Leave that stream as unspecified. And name this stream as Methanol Out.
07:11 Now let us insert a Heat Exchanger into the flowsheet.
07:17 Go to Flowsheet Objects.
07:20 In the Filter list tab, type Heat Exchanger.
07:25 Click on the Heat Exchanger displayed.
07:28 Drag and drop it to the flowsheet.
07:31 Let us now arrange it as required for better visibility.
07:36 Let's click on it.
07:38 On the left, we can see a tab called Property Editor Window.
07:44 Under Connections, click on the drop-down against Inlet Stream 1. And select Methanol In.
07:54 Next, click on the drop-down against Outlet Stream 1. And select Methanol Out.
08:03 Then click on the drop-down against Inlet Stream 2. And select Water In.
08:11 Then click on the drop-down against Outlet Stream 2.

And select Water Out.

08:21 Now go to the next section- Calculation Parameters.
08:27 Here, the first option is Calculation Type.
08:32 Click on the drop-down against Calculation Type.
08:35 Select Shell and Tubes Exchanger Ratings.
08:40 Next, click on the drop-down against Flow Direction
08:45 Select Counter Current.
08:48 Then click on the field against Cold Fluid Pressure Drop and enter 0.002 bar.

Then press Enter.

09:01 Click on the field against Hot Fluid Pressure Drop and enter it as 0.025 bar.
09:10 Then press Enter.
09:13 Now we will enter the properties of Shell & Tube Exchanger.
09:18 Click on Edit Shell and Tube Heat Exchanger Properties.
09:24 Shell and Tube Exchanger Properties window opens.
09:28 Here, we can see the by default values for Shell and Tube side configurations.
09:34 First we will edit the Shell Side Configuration.
09:39 Click on the field against Shell in Series and enter it as 1
09:46 Click on the field against Shell Passes and enter it as 2
09:53 Click on the field against Internal Diameter and enter it as 1000
10:00 Click on the field against Fouling Factor and enter it as 0.00035
10:10 Click on the field against Baffle Spacing and enter it as 250
10:17 Click on the field against Baffle Cut(% diameter) and enter it as 25
10:24 This completes the Shell Side Configuration.
10:28 Now we will edit the Tube Side Configuration.
10:33 Click on the field against Internal Diameter and enter it as 15
10:40 Click on the field against External Diameter and enter it as 20
10:47 Click on the field against Length and enter it as 5
10:54 Click on the field against Fouling Factor and enter it as 0.00035
11:03 Click on the field against Roughness and enter it as 0.05
11:11 Click on the field against Thermal Conductivity and enter it as 60
11:18 Click on the field against Passes per Shell and enter it as 4
11:25 Click on the field against Tubes per Shell and enter it as 1024
11:33 Click on the field against Tube Spacing and enter it as 25
11:40 Click on the drop down against Tube Layout and select Square
11:47 Select the option Cold against Fluid in Tubes
11:53 Now all the Shell & Tube Exchanger Properties are specified.
11:58 Close the Shell and Tube Exchanger Properties window by clicking red cross mark on the top right of the window.
12:06 Now we will run the simulation.
12:09 So, from the toolbar, click on Solve Flowsheet button.
12:15 When the calculations are completed, click on Heat Exchanger in the Flowsheet.
12:21 From the Property Editor Window of Heat Exchanger, locate Calculation Parameters section.
12:28 Check Cold Fluid Outlet Temperature. It is 66.15 degree Centigrade
12:37 Check Hot Fluid Outlet Temperature. It is 40.95 degree Centigrade
12:45 Check Overall Heat Transfer Coefficient. It is 191.83 Watt per meter square kelvin
12:54 Check Heat Exchange Area. It is 319.12 meter square
13:01 From the Property Editor Window of Heat Exchanger, locate Results section.
13:08 Under Results section, check Thermal efficiency; it is 79.05 %
13:17 Check Log Mean Temperature Difference; it is 21.25 degree Centigrade.
13:25 Now we will check the stream-wise temperature results and Material balance.
13:32 Go to Insert menu and select Master Property Table.
13:39 Double-click on the Master Property Table to edit it.
13:44 Configure Master Property Table window opens.
13:49 Enter Name as Heat Exchanger – Stream Wise Results
13:55 Enter Object Type as Material Stream.
13:59 By default, Material Stream is already selected.
14:03 So we will not change it.
14:06 Under Properties to display, select Object as: Water In, Methanol In, Water Out and Methanol Out.
14:18 Under Property, scroll down to see all the parameters.
14:24 Now select the properties as: Temperature
14:29 Pressure
14:31 Mass Flow, Molar Flow
14:36 Molar Fraction(Mixture) / Methanol
14:41 Molar Fraction(Mixture) / Water
14:45 Close this window.
14:48 Move the Master Property Table for better visibility.
14:54 Here we can see the corresponding results for Inlet and Outlet streams.
15:00 Now we will check the properties of Heat Exchanger.
15:05 Go to Insert menu and select Master Property Table.
15:11 Double-click on the Master Property Table.
15:15 Configure Master Property Table window opens.
15:20 Enter Name as Heat Exchanger – Results.
15:25 Enter Object Type as Heat Exchanger.
15:31 Under Properties to display, select Object as HE-004
15:39 Under Property, scroll down to see all the parameters.
15:45 Now select the properties as: Global Heat Transfer Coefficient (U)
15:52 Heat Exchange Area (A)

Heat Load

15:57 Cold fluid outlet temperature
15:59 Hot fluid outlet temperature
16:04 Logarithmic mean temperature difference LMTD and Thermal Efficiency
16:12 Close this window.
16:15 Move the Master Property Table for better visibility.
16:22 Here we can see the corresponding results for Heat Exchanger.
16:27 Let's summarize.
16:29 In this tutorial, we have learnt to Simulate a Shell & Tube Heat Exchanger
16:35 Calculate the Outlet stream temperatures
16:38 Calculate Overall Heat Transfer Coefficient
16:41 Calculate Heat Exchange Area
16:44 Calculate Thermal Efficiency and LMTD
16:48 As an assignment, Repeat this simulation with different Compounds, feed conditions and Thermodynamics.
16:57 Watch the video available at following link.
17:01 It summarizes the Spoken Tutorial project.
17:05 The Spoken Tutorial Project Team

Conducts workshops and Gives certificates. For more details, please write to us.

17:14 Please post your times queries in this forum.
17:18 The FOSSEE team coordinates conversion of existing flow sheets into DWSIM.
17:25 We give honorarium and certificates. For more details, please visit this site.
17:32 The FOSSEE team coordinates coding of solved examples of popular books.
17:38 We give honorarium and certificates . For more details, please visit this site.
17:44 The FOSSEE team helps migrate commercial simulator labs to DWSIM.
17:50 We give honorarium and certificates. For more details, please visit this site
17:57 Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
18:05 This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thanks for joining.

Contributors and Content Editors

PoojaMoolya, Sandhya.np14