View source for DWSIM/C3/Custom-Unit-Operation-using-Scilab/English-timed



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||'''Time'''
||'''Narration'''

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||00:01
||Welcome to this tutorial on simulating a '''Custom Unit Operation''' using '''Scilab.''' 

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||00:07
||In this tutorial, we will learn to: 

Create a custom unit operation using '''Scilab''' 

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||00:14
|| Calculate the '''Outlet pressure '''of '''product stream''' 

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||00:18
|| Calculate '''Molar flow rate '''and''' Enthalpy''' 

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||00:22
||To record this tutorial, I am using 

'''DWSIM 5. 6 update 8''' '''(Classic UI) '''and '''Windows 10''' 

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||00:32
||But, this process is identical in '''Linux, Mac OS X '''or '''FOSSEE OS on ARM'''. 

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||00:40
||To practice this tutorial, you should know to- 

Add components to a '''flowsheet''' 

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||00:46
|| Select '''thermodynamic packages''' 

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||00:49
|| Add '''material streams''' and specify their properties 
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||00:54
||The prerequisite tutorials are available on our website. 
 
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||00:59
||You can access these tutorials and all the associated files from this site. 

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||01:05
||You should also have '''Scilab 5.02 '''(or higher)''' '''installed on your system. 

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||01:12
||First let us learn what is '''Scilab CAPE-OPEN Unit Operation'''. 

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||01:17
||It is an '''unit operation '''implementation for which the calculations can be entered in '''Scilab'''. 

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||01:25
||More information on this is given in the '''Additional reading material''' link of this tutorial. 

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||01:31
||We will develop a '''flowsheet''' to determine the '''product stream Temperature, Pressure,''' 

'''Molar flow rate '''and '''Molar enthalpy '''from a '''Mixer model''' created using '''Scilab'''. 
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|| 01:42
|| Here we give '''Inlet Stream Conditions''' of the '''product stream'''. 

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|| 0147
||Now let me open '''DWSIM (Classic UI).''' 

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||01:52
||To open '''DWSIM''', go to the''' Desktop'''. 

Right-click on '''DWSIM (Classic UI)''' and click '''Run as Administrator.''' 
 
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|| 02:04
|| '''Welcome to DWSIM''' window opens. 

Close this window. 

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||02:10
||Now go to the '''File''' menu and select '''New Steady-state Simulation.''' 

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||02:18
||'''Simulation Configuration Wizard''' window appears. 

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||02:22
||At the bottom, click on the '''Next '''button. 

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||02:26
||In the '''Compounds search''' tab, type '''Water.''' 

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||02:30
||Select '''Water '''from the '''ChemSep database'''. 

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||02:34 
||Similarly, add '''Methanol.''' 

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||02:38
||Followed by '''Ethanol.''' 

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||02:41
||And then click on the '''Next''' button at the bottom. 

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||02:45
||The '''Property Packages '''window opens. 

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||02:49
||From '''Available Property Packages''' list, double-click on '''Raoult’s Law.''' 

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||02:55
||Then click on the '''Next '''button at the bottom. 

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||02:59
||The next option after this, is '''System of Units.''' 

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||03:04
||Under '''System of Units, '''select '''SI'''. 

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||03:08
||Click on the '''Finish '''button at the bottom. 

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||03:12
||Let us maximize the simulation window. 

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||03:16
||Let’s insert the '''feed streams''' that enter the '''Custom Mixer'''. 

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|| 03:21
||Go to '''Streams '''tab, at the bottom of the '''main simulation'''. 

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||03:26
||From the displayed list, drag and drop three '''Material Streams''' to the '''Flowsheet'''. 

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||03:32
||Click on the first '''material stream''' named as '''MSTR-000''' 

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||03:38
||Let’s change the name of this '''stream''' to '''Water.''' 

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|| 03:42
||Now we will specify the '''Water stream''' properties. 

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||03:47
||Go to '''Input Data.''' 

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||03:49
||Under '''Stream Conditions '''tab, select '''Flash Spec''' as '''Temperature and Pressure (TP).''' 

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||03:55
||By default, '''Temperature '''and''' Pressure '''should already be selected as '''Flash Spec.''' 

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||04:01
||Change '''Temperature''' to '''300 Kelvin''' and press '''Enter.''' 

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||04:07
||Change '''Pressure''' to '''100000 Pascals''' and press '''Enter.''' 

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||04:12
||Change '''Mass Flow''' to '''10 kg per second''' and press '''Enter.''' 

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||04:17
||Now let us specify the '''Water stream compositions.''' 

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||04:21
||For this, click on '''Compound Amounts''' tab under '''Input Data.''' 

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||04:27
||Choose the '''Basis''' as '''Mole Fractions''', if not already selected. 

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||04:32
||By default, '''Mole Fractions''' is already selected as '''Basis.''' 

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||04:37
||Now for '''Water''', enter the '''Amount''' as '''1''' and press '''Enter.''' 

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||04:43
||For '''Methanol, '''enter '''0''' and press '''Enter'''. 
 
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||04:48
||For '''Ethanol, '''enter '''0''' and press '''Enter'''. 

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||04:53
||On the right, click on the '''Accept Changes''' button. 

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|| 04:57
||Similarly, we will define the other two '''material streams.''' 

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||05:02
||Click on the second '''material stream''' named '''MSTR-001.''' 

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||05:07
||Let’s change the name of this '''stream''' to '''Methanol.''' 

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|| 05:12
||Now we will specify the '''Methanol stream''' properties. 

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||05:17
||Go to '''Input Data.''' 

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||05:19
||Under '''Stream Conditions tab''', select '''Flash Spec''' as '''Temperature and Pressure (TP).''' 

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||05:25
||Change '''Temperature''' to '''305 Kelvin''' and press '''Enter.''' 

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||05:31
||Change '''Pressure''' to '''150000 Pa'scals'' and press '''Enter.''' 

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||05:37
||Change '''Mass Flow''' to '''15 kg per second''' and press '''Enter.''' 

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||05:43
||Now click on the '''Compound Amounts''' tab under''' Input Data.''' 

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||05:48
||Choose '''Basis''' as '''Mole Fractions.''' 

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||05:52
||Now for '''Water''', enter the '''Amount''' as '''0''' and press '''Enter.''' 

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||05:59
||For '''Methanol, '''enter '''1''' and press '''Enter'''. 

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||06:04
||For '''Ethanol, '''enter '''0''' and press '''Enter'''. 

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||06:09
||On the right, click on the '''Accept Changes''' button. 

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||06:13
||Now, click on the third '''material stream''' named as '''MSTR-002.''' 

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||06:20
||Let’s change the name of this '''stream''' to '''Ethanol.''' 

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|| 06:25
||Now we will specify the '''Ethanol stream''' properties. 

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||06:30
||Go to '''Input Data.''' 

Under '''Stream Conditions '''tab, select '''Flash Spec''' as '''Temperature and Pressure (TP)''' 

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||06:39
||Change '''Temperature''' to '''310 Kelvin''' and press '''Enter.''' 

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||06:45
||Change '''Pressure''' to '''200000 Pascal''' and press '''Enter.''' 
 
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||06:51
||Change '''Mass Flow''' to '''20 kg per second''' and press '''Enter.''' 

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||06:57
||Then under '''Input Data '''click on '''Compound Amounts '''tab. 

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||07:03
||Choose the '''Basis''' as '''Mole Fractions.''' 

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||07:07
||For '''Water''', enter the '''Amount''' as '''0''' and press '''Enter.''' 

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||07:13
||For '''Methanol, '''enter '''0''' and press '''Enter'''. 

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||07:18
||For '''Ethanol, '''enter '''1''' and press '''Enter'''. 

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||07:23
||On the right side, click on the '''Accept Changes''' button. 

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|| 07:27
||Now, let us insert another '''material stream''' that exits the '''custom mixer'''. 

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||07:33
||To do that, let us drag one '''material stream '''to the '''flowsheet'''. 

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|| 07:38
||Let us arrange the '''stream'''. 

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|| 07:41
||We will leave that '''stream''' as unspecified. 

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||07:45
||Then we will change the name of this '''stream '''to '''Mixed Product.''' 

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||07:50
||At the bottom of the main simulation window, go to '''CAPE-OPEN '''tab. 

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||07:55
||Drag and drop '''CAPE-OPEN Unit Operation''' to the '''flowsheet''' area. 

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||08:01
||Add '''CAPE-OPEN Unit Operation '''window opens. 

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||08:05
||From the displayed list, select '''SciLab Unit Operation.''' 

Click on '''OK '''at the bottom. 

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||08:13
||Let us change the name of this '''Unit Operation '''to '''Custom Mixer'''. 

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|| 08:19
||Now, we will create the '''inlet''' and '''outlet connection ports''' for the '''Custom Mixer'''. 

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||08:26
||For this, click on '''Custom Mixer.''' 

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||08:30
||From '''Property Editor window, '''click on '''Open CAPE-OPEN Object Editor.''' 

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||08:36
||'''Scilab CAPE-OPEN Unit Operation '''window opens. 

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||08:40
||Click on '''Ports''' tab. 

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||08:43
||Under '''Feed ports''', there is an '''Add''' button at the bottom. 

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||08:49
||Click on '''Add''' button thrice to create three '''inlet ports''' for the three '''input material streams'''. 
 
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||08:55
||Under '''Product ports''', click on '''Add''' button at the bottom. 

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||09:02
||This will create an '''outlet port''' for the output '''material stream'''. 

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||09:07
||Click on the '''Close '''button at the bottom. 

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||09:11
||Go to '''Property Editor Window'''. 

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||09:14
||Under '''Connections, '''go to '''inlet''' tab. 

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||09:18
||Click on the drop-down against '''Feed 1 '''and select '''Water.''' 

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||09:25
||Next, click on the drop-down against '''Feed 2''' and select '''Methanol.''' 

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||09:33
||Next, click on the drop-down against '''Feed 3''' and select '''Ethanol.''' 

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||09:42
||Now click on the '''Outlet''' tab. 

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||09:45
||Click on the drop-down against '''Product 1 '''and select '''Mixed Product.''' 

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||09:52
||All the connections now are completed. 

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||09:56
||Now we will write the code to perform the computation. 

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||10:01
||Click on '''Open CAPE-OPEN Object Editor.''' 

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||10:05
||Click on '''SciLab''' tab. 

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||10:08
||First we will get the '''feed properties''' of the '''material streams'''. 

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||10:13
||Then we will write the '''calculation routines'''. 

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||10:17
||Type this code in the '''Script '''tab. 

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||10:20
||This is to read the '''molar flow rate''' of the '''compounds''' from the '''inlet material streams'''. 

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||10:26
||Here,''' f1, f2''' and '''f3 '''are the '''variables'''. 

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||10:31
||They store '''molar flow rate''' of the '''compounds''' from the '''inlet material streams'''. 

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||10:37
||'''getFeedProp''' is the '''command''' used to read the specified '''feed property'''. 

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||10:42
||'''1, 2''' and '''3''' are the '''feed port numbers''' in '''SciLab''' to which the '''material streams''' in '''DWSIM''' is connected. 

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||10:52
||'''flow''' is the '''keyword'''. 

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||10:54
||'''flow''' indicates that '''components''' in the '''streams''', has to be stored in''' f1,f2,f3''' in form of an '''array'''. 

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||11:03
||Type this code in the '''Script''' tab. 

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||11:06
||This is to read the '''molar enthalpy''' of the '''inlet streams''' from the added '''inlet material stream'''. 

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||11:13
||Here, variables''' h1, h2''' and '''h3''' store the '''molar enthalpy''' of the added '''input material streams'''. 

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||11:21
||'''enthalpy''' is the '''keyword'''. 

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||11:24
||It indicate that '''molar enthalpy''' of '''material streams''' has to be stored in '''h1, h2''' and '''h3'''. 

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||11:32
||Next, type this code. 

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||11:35
||This is to read the '''pressure''' of the '''inlet streams''' from the added '''inlet material stream'''. 

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||11:41
||Here, variables''' p1, p2''' and '''p3''' store the '''pressures''' of '''Water, Methanol''' and '''Ethanol streams'''. 

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||11:49
||'''pressure''' is the '''keyword'''. 

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||11:51
||It indicates that the '''pressure''' of '''material streams''' has to be stored in the variables''' p1, p2''' and '''p3'''. 

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|| 11:59
||Now we will code the '''calculation routine''' 

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|| 12:03
||First we will calculate the '''outlet pressure'''. 

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||12:07
||For this let us consider the '''outlet pressure''' to be '''average pressure''' of all the '''3 inlet streams'''. 

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||12:15
||Now, type this code. 

'''Outlet pressure''' is calculated and stored in the '''variable p.''' 

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|| 12:24
||Now we will calculate the '''molar flow rate''' of the compounds in the '''output stream'''. 

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||12:30
||Type this code in the '''Script '''tab. 

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||12:33
||'''Molar flow rate''' of '''compounds''' in the '''product stream''' is calculated. 

It is stored in the '''variable f''' in form of an '''array'''. 

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|| 12:43
||Now we will calculate the total '''molar flow rate''' of the '''product stream'''. 

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||12:49
||Type this code in the '''Script''' tab. 

'''Molar flow rate '''of '''product stream''' is calculated and stored in the '''variable totF'''. 

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|| 12:58
||Now we will calculate the '''enthalpy''' of the '''product stream'''. 

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||13:04
||Type this code. 

'''Enthalpy''' of the '''product stream''' is calculated and stored in the '''variable h'''. 

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|| 13:12
||Now we will pass the '''calculated variables''' to the '''Mixed Product material stream'''. 

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||13:18
||Type this code. 

'''setProduct''' indicates that, '''variables''' in the braces are to be passed to the '''stream''' in the '''product'''. 

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||13:28
||At the bottom, click '''Test.''' 

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||13:31
||'''Values''' stored and calculated in all the '''variables''', are displayed in the '''Output''' tab. 

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||13:37
||Click '''Close '''button at the bottom. 

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|| 13:40
||Now we will run the '''simulation.''' 

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||13:43
||So, from the toolbar, click on '''Solve Flowsheet''' button. 

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||13:48
||When the calculations are completed, click on the '''Mixed Product '''in the '''flowsheet'''. 

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||13:53
||Under '''Stream Conditions,''' check '''Temperature, Pressure, Molar Flow'''. 
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|| 14:02
||Let's summarize. 

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|| 14:04
||In this tutorial, we have learnt to 

Create a '''custom unit operation''' using''' Scilab''' , Calculate the '''Outlet pressure '''of '''product stream''', Calculate '''Molar flow rate '''and''' Enthalpy''' 

|- 
||14:19
||As an assignment, 

Create a custom '''model''' for a '''heater''' to heat the given mixture of compounds for different '''Inlet stream conditions'''.

|- 
||14:29
||Watch the video available at following link. 

It summarizes the Spoken Tutorial project. 

|- 
||14:37
||The Spoken Tutorial Project Team 

Conducts workshops and Gives certificates. 

|- 
||14:42
||For more details, please write to us. 
|- 
||14:46
||Please post your times queries in this forum. 

|- 
||14:50
||The '''FOSSEE''' team coordinates conversion of existing flow sheets into '''DWSIM.''' 

|- 
||14:56
||We give honorarium and certificates. 

For more details, please visit this site. 

|- 
||15:03
||The '''FOSSEE''' team coordinates coding of solved examples of popular books. 

|- 
||15:09
||We give honorarium and certificates. 

For more details, please visit this site. 

|- 
||15:16
||The '''FOSSEE''' team helps migrate commercial simulator labs to '''DWSIM.''' 

|- 
||15:22
||We give honorarium and certificates. 

For more details, please visit this site. 

|- 
||15:29
||'''Spoken Tutorial''' and '''FOSSEE''' projects are funded by '''NMEICT, MHRD''', Government of India. 

|- 
||15:38
||This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thanks for joining. 

|}