Difference between revisions of "DWSIM/C2/Shell-and-Tube-Heat-Exchanger/English-timed"

|| Welcome to this tutorial on Simulating a '''Shell & Tube Heat Exchanger '''in '''DWSIM.'''

|| Simulate a '''Shell & Tube Heat Exchanger'''

|| Calculate the '''Outlet stream temperatures'''

|| Calculate '''Overall Heat Transfer Coefficient'''

|| Calculate '''Heat Exchange Area'''

|| Calculate '''Thermal Efficiency '''and''' LMTD'''

|| To record this tutorial, I am using  '''DWSIM 4.3 '''and  '''Windows 7'''

|| 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.

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

|| Here, we will develop a '''flowsheet '''to determine:  '''Outlet stream temperatures'''

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

|| Here we give '''Heat Exchanger''' properties and '''Property package'''.

|| Here we give '''Shell & Tube Heat Exchanger''' Properties.

|| At the bottom, click on '''Next'''

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

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

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

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

|| Go to '''Input Data.

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

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

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

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

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

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

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

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

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

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

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

 

And select '''Water Out.'''

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

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

 

|| Here, we can see the by default values for '''Shell and Tube side configurations'''.

|| First we will edit the '''Shell Side Configuration.'''

|| Click on the field against '''Shell in Series''' and enter it as '''1'''

|| Click on the field against '''Shell Passes''' and enter it as '''2'''

|| Click on the field against '''Internal Diameter''' and enter it as '''1000'''

|| Click on the field against '''Fouling Factor''' and enter it as '''0.00035'''

|| Click on the field against '''Baffle Spacing''' and enter it as '''250'''

|| Click on the field against '''Baffle Cut(% diameter)''' and enter it as '''25'''

|| Click on the field against '''Internal Diameter''' and enter it as '''15'''

|| Click on the field against '''External Diameter''' and enter it as '''20'''

|| Click on the field against '''Length''' and enter it as '''5'''

|| Click on the field against '''Fouling Factor''' and enter it as '''0.00035'''

|| Click on the field against '''Roughness''' and enter it as '''0.05'''

|| Click on the field against '''Thermal Conductivity''' and enter it as '''60'''

|| Click on the field against '''Passes per Shell''' and enter it as '''4'''

|| Click on the field against '''Tubes per Shell''' and enter it as '''1024'''

|| Click on the field against '''Tube Spacing''' and enter it as '''25'''

|| Click on the drop down against '''Tube Layout''' and select '''Square'''

|| Select the option '''Cold''' against '''Fluid in Tubes'''

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

|| Check '''Cold Fluid Outlet Temperature'''. It is '''66.15 degree Centigrade'''

||Check '''Hot Fluid Outlet Temperature'''.  It is '''40.95 degree Centigrade'''

||Check '''Overall Heat Transfer Coefficient'''. It is '''191.83 Watt per meter square kelvin'''

||Check '''Heat Exchange Area'''. It is '''319.12 meter square'''

|| Under '''Results''' section, check '''Thermal efficiency;''' it is '''79.05 %'''

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

|| So we will not change it.

||Now select the properties as: '''Temperature'''

||'''Pressure'''

||'''Mass Flow''', '''Molar Flow'''

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

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

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

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

||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''' and '''Thermal Efficiency'''

|| In this tutorial, we have learnt to  Simulate a''' Shell & Tube Heat Exchanger'''

||Calculate the''' Outlet stream temperatures'''

|| Calculate '''Overall Heat Transfer Coefficient'''

|| Calculate '''Heat Exchange Area'''

|| Calculate''' Thermal Efficiency '''and''' LMTD'''

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

||It summarizes the Spoken Tutorial project.

|| The Spoken Tutorial Project Team

 

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