source: branches/gui/eml/stage_separators/column.mso @ 873

Last change on this file since 873 was 873, checked in by gerson bicca, 13 years ago

revised packed column

File size: 106.9 KB
Line 
1#*-------------------------------------------------------------------
2* EMSO Model Library (EML) Copyright (C) 2004 - 2007 ALSOC.
3*
4* This LIBRARY is free software; you can distribute it and/or modify
5* it under the therms of the ALSOC FREE LICENSE as available at
6* http://www.enq.ufrgs.br/alsoc.
7*
8* EMSO Copyright (C) 2004 - 2007 ALSOC, original code
9* from http://www.rps.eng.br Copyright (C) 2002-2004.
10* All rights reserved.
11*
12* EMSO is distributed under the therms of the ALSOC LICENSE as
13* available at http://www.enq.ufrgs.br/alsoc.
14*
15*----------------------------------------------------------------------
16* File containg models of columns: distillation, stripping, absorbers
17* rectifier, ....
18*
19* The default nomenclature is:
20*               Type_Column_reboilertype_condensertyper
21*
22* where:
23*       Type = refluxed or reboiled or section
24*       Column = Stripping, Absorption, Rectifier, Distillation
25*       Reboiler type (if exists) = kettle or thermosyphon
26*       Condenser type (if exists) = with subccoling or without subcooling
27*
28*-----------------------------------------------------------------------
29* Author: Paula B. Staudt
30* $Id: column.mso 511 2008-05-12 17:25:33Z paula $
31*---------------------------------------------------------------------*#
32
33using "tray";
34using "reboiler";
35using "condenser";
36using "mixers_splitters/splitter";
37using "tank";
38using "pressure_changers/pump";
39
40Model ControlSection
41
42ATTRIBUTES
43        Pallete = false;
44        Brief = "Control variables for column section.";
45
46PARAMETERS
47        outer NComp             as Integer      (Brief="Number of components");
48
49        Tindicator_TrayNumber   as Integer      (Brief="Temperature Indicator in the tray");
50        Pindicator_TrayNumber   as Integer      (Brief="Pressure Indicator in the tray");
51
52end
53
54Model InitializeSection
55
56ATTRIBUTES
57        Pallete = false;
58        Brief = "Initial conditions for column section.";
59
60PARAMETERS
61        outer NComp             as Integer      (Brief="Number of components");
62
63        TopTemperature          as temperature  (Brief = "Tray Temperature at Column Top", Default = 300);
64        BottomTemperature       as temperature  (Brief = "Tray Temperature at Column Bottom", Default = 330);
65        LevelFraction           as fraction             (Brief = "Tray Level Fraction", Default = 0.5);
66
67        TopComposition(NComp)           as fraction     (Brief = "Component Molar Fraction at Column Top", Default = 0.30);
68        BottomComposition(NComp)        as fraction     (Brief = "Component Molar Fraction at Column Bottom", Default = 0.30);
69
70end
71
72Model InitializeStage
73
74ATTRIBUTES
75        Pallete = false;
76        Brief = "Initial conditions for Packed column section.";
77
78PARAMETERS
79        outer NComp             as Integer      (Brief="Number of components");
80
81        TopStageTemperature             as temperature  (Brief = "Tray Temperature at Column Top", Default = 300);
82        BottomStageTemperature          as temperature  (Brief = "Tray Temperature at Column Bottom", Default = 300);
83       
84        TopStageComposition(NComp)              as fraction     (Brief = "Component Molar Fraction at Top");
85        BottomStageComposition(NComp)   as fraction     (Brief = "Component Molar Fraction at Bottom");
86        ColumnHoldup                                    as positive (Brief = "Column holdup", Default=0.1);
87
88end
89
90
91Model SectionColumnBasic
92
93ATTRIBUTES
94        Pallete = false;
95        Brief   = "Model of a basic column section.";
96        Info    =
97"Model of a basic column section containing a vetor of TRAYS numbered from the top-down.";
98
99PARAMETERS
100        outer PP                as Plugin               (Brief="External Physical Properties", Type="PP");
101        outer NComp     as Integer              (Brief="Number of components");
102
103        NumberOfFeeds                                           as Integer                      (Brief="Number of Feed Trays",Default=3,Protected=true);
104        FeedTrayLocation(NumberOfFeeds)         as Integer                      (Brief="Feed tray Location",Default=2);
105        NumberOfTrays                                           as Integer                      (Brief="Number of trays", Default=8);
106        LiqSideTrayIndex(NumberOfTrays)         as Integer                      (Brief="Liquid Side Tray Index", Default=0,Hidden=true);
107        VapSideTrayIndex(NumberOfTrays)         as Integer                      (Brief="Vapour Side Tray Index", Default=0,Hidden=true);
108
109        LiquidSideStreamLocation                        as Integer                      (Brief="Liquid Side Stream Location", Default=2);
110        VapourSideStreamLocation                        as Integer                      (Brief="Vapour Side Stream Location", Default=2);
111        Pi                                                                      as constant             (Brief="Pi Number",Default=3.14159265, Symbol = "\pi",Hidden=true);
112        Gconst                                                          as acceleration         (Brief="Gravity Acceleration",Default=9.81,Hidden=true);
113        Mw(NComp)                                                       as molweight            (Brief="Component Mol Weight",Hidden=true);
114        zero_flow                                                       as flow_mol             (Brief = "Stream Flow closed",Default = 0, Hidden=true);
115        low_flow                                                        as flow_mol             (Brief = "Low stream Flow",Default = 1E-6, Hidden=true);
116
117        VapourFlowModel         as Switcher     (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer");
118        LiquidFlowModel         as Switcher     (Valid = ["Francis", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "Francis");
119
120        TrayDiameter                    as length               (Brief="Tray Diameter",Default=1.600);
121        TraySpacing                             as length               (Brief="Tray Spacing",Default=0.600);
122        Fraction_HoleArea               as fraction     (Brief="Fraction of the active area that is occupied by the holes with respect to the total tray area",Default=0.10);
123        Fraction_DowncomerArea  as fraction     (Brief="Fraction of the downcomer area with respect to the total tray area",Default=0.20);
124        WeirLength                              as length               (Brief="Weir length", Default = 1);
125        WeirHeight                              as length               (Brief="Weir height", Default= 0.05);
126        TrayLiquidPasses                as positive     (Brief="Number of liquid passes in the tray", Lower = 1,Default=1);
127        HeatSupply                              as heat_rate    (Brief="Rate of heat supply",Default = 0);
128        AerationFraction                as Real                 (Brief="Aeration fraction", Default = 1);
129        DryPdropCoeff                   as Real                 (Brief="Dry pressure drop coefficient", Default= 0.60);
130       
131        PlateArea               as area         (Brief="Plate area = Atray - Adowncomer",Protected=true);
132        TrayVolume              as volume       (Brief="Total Volume of the tray",Protected=true);
133        HolesArea               as area         (Brief="Total holes area",Protected=true);
134
135        FeeheryCoeff    as Real         (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true);
136        ElgueCoeff              as Real         (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true);
137        OlsenCoeff              as Real         (Brief="Olsens correlation coefficient", Default=1,Hidden=true);
138       
139        VapourFlow      as Switcher     (Brief="Flag for Vapour Flow condition",Valid = ["on", "off"], Default = "off",Hidden=true);
140        LiquidFlow      as Switcher     (Brief="Flag for Liquid Flow condition",Valid = ["on", "off"], Default = "off",Hidden=true);
141
142SET
143        VapSideTrayIndex(VapourSideStreamLocation) =1;
144        LiqSideTrayIndex(LiquidSideStreamLocation) =1;
145        Mw = PP.MolecularWeight();
146        zero_flow = 0 * 'kmol/h';
147        low_flow = 1E-6 * 'kmol/h';
148
149        PlateArea = 0.25*Pi*(TrayDiameter^2)*(1-Fraction_DowncomerArea);
150        TrayVolume = 0.25*Pi*(TrayDiameter^2)*TraySpacing;
151        HolesArea = 0.25*Pi*(TrayDiameter^2)*Fraction_HoleArea;
152
153VARIABLES
154
155        INITIALIZATION as InitializeSection (Brief="Column Model Initialization");
156        CONTROL                 as ControlSection (Brief="Column Model Control");
157       
158        out     TCI as control_signal   (Brief="Temperature  Indicator", Protected = true, PosX=1, PosY=0.73);
159        out     PCI as control_signal   (Brief="Pressure Indicator", Protected = true, PosX=0, PosY=0.24);
160       
161    in  LiquidInlet     as stream         (Brief="Liquid Inlet in the section", PosX=0.70, PosY=0);
162    out VapourOutlet    as vapour_stream  (Brief="Vapour Outlet in the section", PosX=0.30, PosY=0);
163
164    out VapourDrawOff   as vapour_stream  (Brief="Vapour Draw Off Port in the section", PosX=1, PosY=0.35,Protected = true);
165        out LiquidDrawOff   as liquid_stream  (Brief="Liquid Draw Off Port in the section", PosX=1, PosY=0.65,Protected = true);
166       
167        TRAYS(NumberOfTrays)    as tray                 (Brief="Number of trays in the Column Section",Protected=true);
168        VapourDrawOffFlow               as flow_mol     (Brief="Vapour Draw Off Stream Molar Flow Rate");
169        LiquidDrawOffFlow               as flow_mol     (Brief="Vapour Draw Off Stream Molar Flow Rate");
170        MurphreeEff                     as Real                 (Brief="Murphree efficiency for All Trays",Lower=0.01,Upper=1);
171
172        in      VapourInlet     as stream             (Brief="Vapour Inlet in the section", PosX=0.30, PosY=1);
173        out     LiquidOutlet    as liquid_stream      (Brief="Liquid Outlet in the section", PosX=0.70, PosY=1);
174       
175        LiquidConnector as stream    (Brief="Liquid connection in the middle TRAYS", PosX=0.75, PosY=1,Hidden=true);
176        VapourConnector as stream    (Brief="Vapour connection in the middle TRAYS", PosX=0.55, PosY=0,Hidden=true);
177       
178CONNECTIONS
179        TRAYS([2:NumberOfTrays]).OutletVapour   to TRAYS([1:NumberOfTrays-1]).InletVapour;
180        TRAYS([1:NumberOfTrays-1]).OutletLiquid to TRAYS([2:NumberOfTrays]).InletLiquid;
181       
182    LiquidConnector to TRAYS(1).InletLiquid;
183    VapourConnector to TRAYS(NumberOfTrays).InletVapour;
184       
185INITIAL
186
187for i in 1:NumberOfTrays do
188
189"The initial temperature of the TRAYS"
190        TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1));
191
192"The initial Level of the TRAYS"
193        TRAYS(i).Level = INITIALIZATION.LevelFraction*WeirHeight;
194end
195
196for i in 1:NComp-1 do
197
198for j in 1:NumberOfTrays do
199
200"The initial composition of the TRAYS - Normalized"
201        TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1));
202end
203
204end
205
206EQUATIONS
207
208"Tray Temperature Indicator"   
209        #TCI*'K' = TRAYS(min([NumberOfTrays, CONTROL.Tindicator_TrayNumber])).OutletVapour.T;
210        TCI*'K' = TRAYS(CONTROL.Tindicator_TrayNumber).OutletVapour.T;
211
212"Tray Pressure Indicator"       
213        #PCI*'atm' = TRAYS(min([NumberOfTrays, CONTROL.Pindicator_TrayNumber])).OutletVapour.P;
214        PCI*'atm' = TRAYS(CONTROL.Pindicator_TrayNumber).OutletVapour.P;
215
216for i in [1:NumberOfTrays] do
217
218"Murphree Efficiency"
219        TRAYS(i).OutletVapour.z =  MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z;
220
221"Level of clear liquid over the weir"
222        TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/PlateArea;
223
224"Geometry Constraint"
225        TrayVolume = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV;
226
227"Energy Holdup"
228        TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*TrayVolume;
229
230"Energy Balance"
231        diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h
232        -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + HeatSupply );
233
234switch LiquidFlow
235                case "on":
236                        switch LiquidFlowModel
237                                case "Francis":
238                                "Francis Equation"
239                                TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*WeirLength*((TRAYS(i).Level-(AerationFraction*WeirHeight))/(AerationFraction))^2;
240                       
241                                case "Wang_Fl":
242                                TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'m^0.5/s'*WeirLength*((TRAYS(i).Level-(AerationFraction*WeirHeight))/(AerationFraction))^1.5;
243                       
244                                case "Olsen":
245                                TRAYS(i).OutletLiquid.F / 'mol/s'= WeirLength*TrayLiquidPasses*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletVapour.z)/(0.665*OlsenCoeff)^1.5 * ((TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/TRAYS(i).rhoL/PlateArea)-WeirHeight)^1.5 * 'm^0.5/mol';
246                       
247                                case "Feehery_Fl":
248                                TRAYS(i).OutletLiquid.F = WeirLength*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z) * ((TRAYS(i).Level-WeirHeight)/750/'mm')^1.5 * 'm^2/s';
249                       
250                                case "Roffel_Fl":
251                                TRAYS(i).OutletLiquid.F = 2/3*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z)*WeirLength*(TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/(PlateArea*1.3)/TRAYS(i).rhoL)^1.5*sqrt(2*Gconst/
252                                                        (2*(1 - 0.3593/'Pa^0.0888545'*abs(TRAYS(i).OutletVapour.F*sum(Mw*TRAYS(i).OutletVapour.z)/(PlateArea*1.3)/sqrt(TRAYS(i).rhoV))^0.177709)-1)); #/'(kg/m)^0.0888545/s^0.177709';
253                        end
254                when TRAYS(i).Level < (AerationFraction *WeirHeight) switchto "off";
255               
256                case "off":
257               
258                "Low level"
259                TRAYS(i).OutletLiquid.F = zero_flow;
260               
261                when TRAYS(i).Level > (AerationFraction * WeirHeight) switchto "on";
262               
263        end
264       
265switch VapourFlow
266                case "on":
267                        switch VapourFlowModel
268                                case "Reepmeyer":
269                                TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/(TRAYS(i).rhoV*DryPdropCoeff))*HolesArea;
270                       
271                                case "Feehery_Fv":
272                                TRAYS(i).InletVapour.F = TRAYS(i).rhoV/PlateArea/FeeheryCoeff/sum(Mw*TRAYS(i).OutletVapour.z) * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-(TRAYS(i).rhoV*Gconst*TRAYS(i).ML*TRAYS(i).vL/PlateArea))/TRAYS(i).rhoV);
273                       
274                                case "Roffel_Fv":
275                                TRAYS(i).InletVapour.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)*1e5 - (AerationFraction*sum(TRAYS(i).M*Mw)/(PlateArea*1.3)*Gconst*1e5) * (TRAYS(i).rhoV*HolesArea/sum(Mw*TRAYS(i).OutletVapour.z))^1.08 * 'm^1.08/mol^1.08';
276                       
277                                case "Klingberg":
278                                TRAYS(i).InletVapour.F * TRAYS(i).vV = PlateArea * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*Gconst*TRAYS(i).Level)/TRAYS(i).rhoV);
279                       
280                                case "Wang_Fv":
281                                TRAYS(i).InletVapour.F * TRAYS(i).vV = PlateArea * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*Gconst*TRAYS(i).Level)/TRAYS(i).rhoV*DryPdropCoeff);
282                               
283                                case "Elgue":
284                                TRAYS(i).InletVapour.F  = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/ElgueCoeff);
285                        end
286                when TRAYS(i).InletVapour.F < low_flow switchto "off";
287               
288                case "off":
289                TRAYS(i).InletVapour.F = zero_flow;
290               
291                when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P switchto "on";
292               
293        end
294
295end
296
297"Liquid Inlet Flow"     
298        LiquidConnector.F = LiquidInlet.F;
299
300"Liquid Inlet Temperature"             
301        LiquidConnector.T = LiquidInlet.T;
302
303"Liquid Inlet Pressure"         
304        LiquidConnector.P = LiquidInlet.P;
305
306"Liquid Inlet Composition"             
307        LiquidConnector.z = LiquidInlet.z;
308
309"Liquid Inlet Vapour Fraction"         
310        LiquidConnector.v = LiquidInlet.v;
311
312"Liquid Inlet Enthalpy"         
313        LiquidConnector.h = LiquidInlet.h;
314
315"Vapour Inlet Flow"             
316        VapourConnector.F = VapourInlet.F;
317
318"Vapour Inlet Temperature"             
319        VapourConnector.T = VapourInlet.T;
320
321"Vapour Inlet Pressure"         
322        VapourConnector.P = VapourInlet.P;
323
324"Vapour Inlet Composition"             
325        VapourConnector.z = VapourInlet.z;
326
327"Vapour Inlet Vapour Fraction"         
328        VapourConnector.v = VapourInlet.v;
329
330"Vapour Inlet Enthalpy"         
331        VapourConnector.h = VapourInlet.h;
332
333"Liquid Outlet Flow"   
334        LiquidOutlet.F = TRAYS(NumberOfTrays).OutletLiquid.F;
335
336"Liquid Outlet Temperature"     
337        LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T;
338
339"Liquid Outlet Pressure"       
340        LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P;
341
342"Liquid Outlet Composition"     
343        LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z;
344
345"Vapour Outlet Flow"           
346        VapourOutlet.F = TRAYS(1).OutletVapour.F;
347
348"Vapour Outlet Temperature"             
349        VapourOutlet.T = TRAYS(1).OutletVapour.T;
350
351"Vapour Outlet Pressure"               
352        VapourOutlet.P = TRAYS(1).OutletVapour.P;
353
354"Vapour Outlet Composition"             
355        VapourOutlet.z = TRAYS(1).OutletVapour.z;
356
357"Vapour Draw Off Stream - Flow"         
358        VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F;
359
360"Vapour Draw Off Stream - Temperature"         
361        VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T;
362
363"Vapour Draw Off Stream - Pressure"             
364        VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P;
365
366"Vapour Draw Off Stream - Composition"         
367        VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z;
368
369"Vapour Draw Off Stream"       
370        VapourDrawOffFlow = VapourDrawOff.F;
371
372"Liquid Draw Off Stream - Flow"         
373        LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F;
374
375"Liquid Draw Off Stream - Temperature" 
376        LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T;
377
378"Liquid Draw Off Stream - Pressure"                     
379        LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P;
380
381"Liquid Draw Off Stream - Composition" 
382        LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z;
383
384"Liquid Draw Off Stream"       
385        LiquidDrawOffFlow = LiquidDrawOff.F;
386
387end
388
389Model Section_Column    as SectionColumnBasic
390
391ATTRIBUTES
392        Pallete         = true;
393        Icon            = "icon/SectionColumn";
394        Brief   = "Model of a column section.";
395        Info            =
396"== Model of a column section containing ==
397* NumberOfTrays TRAYS.
398* One Feed Inlet.
399       
400== Specify ==
401* the feed stream of each tray (Inlet);
402* the Murphree eficiency for each tray Emv;
403* the InletLiquid stream of the top tray;
404* the InletVapour stream of the bottom tray.
405       
406== Initial Conditions ==
407* the TRAYS temperature (OutletLiquid.T);
408* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
409* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
410";
411
412SET
413        NumberOfFeeds = 1;
414
415VARIABLES
416       
417        in      FeedTray        as stream               (Brief="Feed stream", PosX=0, PosY=0.55);
418
419EQUATIONS
420#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
421# Equating Feed Tray Variables to Trays Variables
422#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
423for i in 1:NumberOfTrays do
424
425if   i equal FeedTrayLocation(1) then   
426
427"FeedTrayTop Inlet Flow"       
428        FeedTray.F= TRAYS(i).Inlet.F;
429
430"FeedTrayTop Inlet Temperature"
431        FeedTray.T = TRAYS(i).Inlet.T;
432
433"FeedTrayTop Inlet Pressure"
434        FeedTray.P = TRAYS(i).Inlet.P;
435
436"FeedTrayTop Inlet Composition"
437        FeedTray.z = TRAYS(i).Inlet.z;
438
439"FeedTrayTop Inlet Vapour Fraction"
440        FeedTray.v = TRAYS(i).Inlet.v;
441
442"FeedTrayTop Inlet Enthalpy"
443        FeedTray.h = TRAYS(i).Inlet.h;
444
445else
446
447"Inlet Tray - Flow Sealed"
448    0*'mol/h'= TRAYS(i).Inlet.F;
449       
450"Inlet Tray -  Temperature"
451    300*'K' = TRAYS(i).Inlet.T;
452       
453"Inlet Tray -  Pressure"
454    1*'atm' = TRAYS(i).Inlet.P;
455       
456"Inlet Tray -  Composition"
457    0.1 = TRAYS(i).Inlet.z;
458       
459"Inlet Tray -  Vapour Fraction"
460    0 = TRAYS(i).Inlet.v;
461       
462"Inlet Tray -  Enthalpy"
463    0*'J/mol' = TRAYS(i).Inlet.h;
464
465end
466
467end
468
469end
470
471Model Section_Column2   as SectionColumnBasic
472
473ATTRIBUTES
474        Pallete         = true;
475        Icon            = "icon/SectionColumn";
476        Brief   = "Model of a column section.";
477        Info            =
478"== Model of a column section containing ==
479* NumberOfTrays TRAYS.
480* Two Feed Inlets.
481       
482== Specify ==
483* the feed stream of each tray (Inlet);
484* the Murphree eficiency for each tray Emv;
485* the InletLiquid stream of the top tray;
486* the InletVapour stream of the bottom tray.
487       
488== Initial Conditions ==
489* the TRAYS temperature (OutletLiquid.T);
490* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
491* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
492";
493
494SET
495        NumberOfFeeds = 2;
496
497VARIABLES
498       
499        in      FeedTrayOne     as stream               (Brief="Feed stream", PosX=0, PosY=0.45);
500        in      FeedTrayTwo     as stream               (Brief="Feed stream", PosX=0, PosY=0.65);
501
502EQUATIONS
503
504for i in 1:NumberOfTrays do
505
506if   i equal FeedTrayLocation(1) then   
507
508"FeedTrayTop Inlet Flow"       
509        FeedTrayOne.F= TRAYS(i).Inlet.F;
510
511"FeedTrayTop Inlet Temperature"
512        FeedTrayOne.T = TRAYS(i).Inlet.T;
513
514"FeedTrayTop Inlet Pressure"
515        FeedTrayOne.P = TRAYS(i).Inlet.P;
516
517"FeedTrayTop Inlet Composition"
518        FeedTrayOne.z = TRAYS(i).Inlet.z;
519
520"FeedTrayTop Inlet Vapour Fraction"
521        FeedTrayOne.v = TRAYS(i).Inlet.v;
522
523"FeedTrayTop Inlet Enthalpy"
524        FeedTrayOne.h = TRAYS(i).Inlet.h;
525
526else if   i equal FeedTrayLocation(2) then   
527
528"FeedTrayBottom Inlet Flow"     
529        FeedTrayTwo.F= TRAYS(i).Inlet.F;
530
531"FeedTrayBottom Inlet Temperature"
532        FeedTrayTwo.T = TRAYS(i).Inlet.T;
533
534"FeedTrayBottom Inlet Pressure"
535        FeedTrayTwo.P = TRAYS(i).Inlet.P;
536
537"FeedTrayBottom Inlet Composition"
538        FeedTrayTwo.z = TRAYS(i).Inlet.z;
539
540"FeedTrayBottom Inlet Vapour Fraction"
541        FeedTrayTwo.v = TRAYS(i).Inlet.v;
542
543"FeedTrayBottom Inlet Enthalpy"
544        FeedTrayTwo.h = TRAYS(i).Inlet.h;
545
546else
547
548"Inlet Tray - Flow Sealed"
549    0*'mol/h'= TRAYS(i).Inlet.F;
550       
551"Inlet Tray -  Temperature"
552    300*'K' = TRAYS(i).Inlet.T;
553       
554"Inlet Tray -  Pressure"
555    1*'atm' = TRAYS(i).Inlet.P;
556       
557"Inlet Tray -  Composition"
558    0.1 = TRAYS(i).Inlet.z;
559       
560"Inlet Tray -  Vapour Fraction"
561    0 = TRAYS(i).Inlet.v;
562       
563"Inlet Tray -  Enthalpy"
564    0*'J/mol' = TRAYS(i).Inlet.h;
565
566end
567
568end
569
570end
571
572end
573
574Model Section_Column3   as SectionColumnBasic
575
576ATTRIBUTES
577        Pallete         = true;
578        Icon            = "icon/SectionColumn";
579        Brief   = "Model of a column section.";
580        Info            =
581"== Model of a column section containing ==
582* NumberOfTrays TRAYS.
583* Three Feed Inlets.
584       
585== Specify ==
586* the feed stream of each tray (Inlet);
587* the Murphree eficiency for each tray Emv;
588* the InletLiquid stream of the top tray;
589* the InletVapour stream of the bottom tray.
590       
591== Initial Conditions ==
592* the TRAYS temperature (OutletLiquid.T);
593* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
594* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
595";
596
597SET
598        NumberOfFeeds = 3;
599
600VARIABLES
601       
602        in      FeedTrayOne     as stream               (Brief="Feed stream", PosX=0, PosY=0.45);
603        in      FeedTrayTwo     as stream               (Brief="Feed stream", PosX=0, PosY=0.65);
604        in      FeedTrayThree   as stream               (Brief="Feed stream", PosX=0, PosY=0.85);
605
606EQUATIONS
607
608for i in 1:NumberOfTrays do
609
610if   i equal FeedTrayLocation(1) then   
611
612"FeedTrayTop Inlet Flow"       
613        FeedTrayOne.F= TRAYS(i).Inlet.F;
614
615"FeedTrayTop Inlet Temperature"
616        FeedTrayOne.T = TRAYS(i).Inlet.T;
617
618"FeedTrayTop Inlet Pressure"
619        FeedTrayOne.P = TRAYS(i).Inlet.P;
620
621"FeedTrayTop Inlet Composition"
622        FeedTrayOne.z = TRAYS(i).Inlet.z;
623
624"FeedTrayTop Inlet Vapour Fraction"
625        FeedTrayOne.v = TRAYS(i).Inlet.v;
626
627"FeedTrayTop Inlet Enthalpy"
628        FeedTrayOne.h = TRAYS(i).Inlet.h;
629
630else if   i equal FeedTrayLocation(2) then   
631
632"FeedTrayBottom Inlet Flow"     
633        FeedTrayTwo.F= TRAYS(i).Inlet.F;
634
635"FeedTrayBottom Inlet Temperature"
636        FeedTrayTwo.T = TRAYS(i).Inlet.T;
637
638"FeedTrayBottom Inlet Pressure"
639        FeedTrayTwo.P = TRAYS(i).Inlet.P;
640
641"FeedTrayBottom Inlet Composition"
642        FeedTrayTwo.z = TRAYS(i).Inlet.z;
643
644"FeedTrayBottom Inlet Vapour Fraction"
645        FeedTrayTwo.v = TRAYS(i).Inlet.v;
646
647"FeedTrayBottom Inlet Enthalpy"
648        FeedTrayTwo.h = TRAYS(i).Inlet.h;
649
650else if   i equal FeedTrayLocation(3) then   
651
652"FeedTrayBottom Inlet Flow"     
653        FeedTrayThree.F= TRAYS(i).Inlet.F;
654
655"FeedTrayBottom Inlet Temperature"
656        FeedTrayThree.T = TRAYS(i).Inlet.T;
657
658"FeedTrayBottom Inlet Pressure"
659        FeedTrayThree.P = TRAYS(i).Inlet.P;
660
661"FeedTrayBottom Inlet Composition"
662        FeedTrayThree.z = TRAYS(i).Inlet.z;
663
664"FeedTrayBottom Inlet Vapour Fraction"
665        FeedTrayThree.v = TRAYS(i).Inlet.v;
666
667"FeedTrayBottom Inlet Enthalpy"
668        FeedTrayThree.h = TRAYS(i).Inlet.h;
669
670else
671
672"Inlet Tray - Flow Sealed"
673    0*'mol/h'= TRAYS(i).Inlet.F;
674       
675"Inlet Tray -  Temperature"
676    300*'K' = TRAYS(i).Inlet.T;
677       
678"Inlet Tray -  Pressure"
679    1*'atm' = TRAYS(i).Inlet.P;
680       
681"Inlet Tray -  Composition"
682    0.1 = TRAYS(i).Inlet.z;
683       
684"Inlet Tray -  Vapour Fraction"
685    0 = TRAYS(i).Inlet.v;
686       
687"Inlet Tray -  Enthalpy"
688    0*'J/mol' = TRAYS(i).Inlet.h;
689
690end
691
692end
693
694end
695
696end
697
698end
699
700
701Model ColumnBasic
702
703ATTRIBUTES
704        Pallete = false;
705        Brief   = "Model of a basic column.";
706        Info    =
707"Model of a basic column containing a vetor of TRAYS numbered from the top-down.";
708
709PARAMETERS
710        outer PP                as Plugin       (Brief="External Physical Properties", Type="PP");
711        outer NComp     as Integer      (Brief="Number of components");
712
713        NumberOfFeeds                                           as Integer                      (Brief="Number of Feed Trays",Default=3,Protected=true);
714        FeedTrayLocation(NumberOfFeeds)         as Integer                      (Brief="Feed tray Location",Default=2);
715        NumberOfTrays                                           as Integer                      (Brief="Number of trays", Default=8);
716        LiqSideTrayIndex(NumberOfTrays)         as Integer                      (Brief="Liquid Side Tray Index", Default=0,Hidden=true);
717        VapSideTrayIndex(NumberOfTrays)         as Integer                      (Brief="Vapour Side Tray Index", Default=0,Hidden=true);
718        LiquidSideStreamLocation                        as Integer                      (Brief="Liquid Side Stream Location", Default=2);
719        VapourSideStreamLocation                        as Integer                      (Brief="Vapour Side Stream Location", Default=2);
720        g                                                                       as acceleration         (Brief="Gravity Acceleration",Default=9.81,Hidden=true);
721        Mw(NComp)                                                       as molweight            (Brief="Component Mol Weight",Hidden=true);
722
723        VapourFlowModel         as Switcher     (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer");
724        LiquidFlowModel         as Switcher     (Valid = ["default", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "default");
725
726        TrayDiameter                    as length               (Brief="Tray Diameter",Default=1.600);
727        TraySpacing                             as length               (Brief="Tray Spacing",Default=0.600);
728        Fraction_HoleArea               as fraction     (Brief="Fraction of the active area that is occupied by the holes with respect to the total tray area",Default=0.10);
729        Fraction_DowncomerArea  as fraction     (Brief="Fraction of the downcomer area with respect to the total tray area",Default=0.20);
730        WeirLength                              as length               (Brief="Weir length", Default = 1);
731        WeirHeight                              as length               (Brief="Weir height", Default= 0.05);
732        TrayLiquidPasses                as positive     (Brief="Number of liquid passes in the tray", Lower = 1,Default=1);
733        HeatSupply                              as heat_rate    (Brief="Rate of heat supply",Default = 0);
734        AerationFraction                as Real                 (Brief="Aeration fraction", Default = 1);
735        DryPdropCoeff                   as Real                 (Brief="Dry pressure drop coefficient", Default= 0.60);
736       
737        PlateArea               as area         (Brief="Plate area = Atray - Adowncomer",Protected=true);
738        TrayVolume              as volume       (Brief="Total Volume of the tray",Protected=true);
739        HolesArea               as area         (Brief="Total holes area",Protected=true);
740       
741        FeeheryCoeff            as Real                 (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true);
742        ElgueCoeff                      as Real                 (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true);
743        OlsenCoeff                      as Real                 (Brief="Olsens correlation coefficient", Default=1,Hidden=true);
744       
745        Pi                      as constant             (Brief="Pi Number",Default=3.14159265, Symbol = "\pi",Hidden=true);
746        zero_flow       as flow_mol             (Brief = "Stream Flow closed",Default = 0, Hidden=true);
747        low_flow        as flow_mol             (Brief = "Low stream Flow",Default = 1E-6, Hidden=true);
748        VapourFlow      as Switcher     (Valid = ["on", "off"], Default = "on",Hidden=true);
749        LiquidFlow      as Switcher     (Valid = ["on", "off"], Default = "on",Hidden=true);
750
751SET
752        VapSideTrayIndex(VapourSideStreamLocation) =1;
753        LiqSideTrayIndex(LiquidSideStreamLocation) =1;
754        Mw = PP.MolecularWeight();
755        zero_flow = 0 * 'kmol/h';
756        low_flow = 1E-6 * 'kmol/h';
757
758        PlateArea = 0.25*Pi*(TrayDiameter^2)*(1-Fraction_DowncomerArea);
759        TrayVolume = 0.25*Pi*(TrayDiameter^2)*TraySpacing;
760        HolesArea = 0.25*Pi*(TrayDiameter^2)*Fraction_HoleArea;
761
762VARIABLES
763
764        INITIALIZATION as InitializeSection (Brief = "Column Model Initialization");
765        CONTROL                 as ControlSection (Brief = "Control");
766       
767        out     TCI as control_signal   (Brief="Temperature  Indicator", Protected = true, PosX=1, PosY=0.55);
768        out     PCI as control_signal   (Brief="Pressure Indicator", Protected = true, PosX=0, PosY=0.23);
769       
770        TRAYS(NumberOfTrays)    as tray                 (Brief="Number of trays in the Column Section");
771        VapourDrawOffFlow               as flow_mol     (Brief="Vapour Draw Off Stream Molar Flow Rate");
772        LiquidDrawOffFlow               as flow_mol     (Brief="Vapour Draw Off Stream Molar Flow Rate");
773        MurphreeEff                     as Real                 (Brief="Murphree efficiency for All Trays",Lower=0.01,Upper=1);
774
775        out     VapourDrawOff   as vapour_stream        (Brief="Vapour Outlet in the section", PosX=1, PosY=0.388,Protected = true);
776        out     LiquidDrawOff   as liquid_stream        (Brief="Liquid Outlet in the section", PosX=1, PosY=0.47,Protected = true);
777
778CONNECTIONS
779
780#Connecting Intermediate Trays
781        TRAYS([2:NumberOfTrays]).OutletVapour   to TRAYS([1:NumberOfTrays-1]).InletVapour;
782        TRAYS([1:NumberOfTrays-1]).OutletLiquid         to TRAYS([2:NumberOfTrays]).InletLiquid;
783       
784INITIAL
785
786for i in 1:NumberOfTrays do
787
788"The initial temperature of the TRAYS"
789        TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1));
790
791"The initial Level of the TRAYS"
792        TRAYS(i).Level = INITIALIZATION.LevelFraction*WeirHeight;
793end
794
795for i in 1:NComp-1 do
796
797for j in 1:NumberOfTrays do
798
799"The initial composition of the TRAYS - Normalized"
800        TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1));
801end
802
803end
804
805EQUATIONS
806
807        VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F;
808        VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T;
809        VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P;
810        VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z;
811
812        LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F;
813        LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T;
814        LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P;
815        LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z;
816
817        VapourDrawOffFlow = VapourDrawOff.F;
818        LiquidDrawOffFlow = LiquidDrawOff.F;
819       
820"Tray Temperature Indicator"   
821        #TCI*'K' = TRAYS(min([NumberOfTrays, CONTROL.Tindicator_TrayNumber])).OutletVapour.T;
822        TCI*'K' = TRAYS(CONTROL.Tindicator_TrayNumber).OutletVapour.T;
823
824"Tray Pressure Indicator"       
825        #PCI*'atm' = TRAYS(min([NumberOfTrays, CONTROL.Pindicator_TrayNumber])).OutletVapour.P;
826        PCI*'atm' = TRAYS(CONTROL.Pindicator_TrayNumber).OutletVapour.P;
827
828for i in [1:NumberOfTrays] do
829
830"Murphree Efficiency"
831        TRAYS(i).OutletVapour.z =  MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z;
832
833"Level of clear liquid over the weir"
834        TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/PlateArea;
835
836"Geometry Constraint"
837        TrayVolume = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV;
838
839"Energy Holdup"
840        TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*TrayVolume;
841
842"Energy Balance"
843        diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h
844        -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + HeatSupply );
845
846switch LiquidFlow
847                case "on":
848                        switch LiquidFlowModel
849                                case "default":
850                                "Francis Equation"
851                                TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*WeirLength*((TRAYS(i).Level-(AerationFraction*WeirHeight))/(AerationFraction))^2;
852                       
853                                case "Wang_Fl":
854                                TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'m^0.5/s'*WeirLength*((TRAYS(i).Level-(AerationFraction*WeirHeight))/(AerationFraction))^1.5;
855                       
856                                case "Olsen":
857                                TRAYS(i).OutletLiquid.F / 'mol/s'= WeirLength*TrayLiquidPasses*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletVapour.z)/(0.665*OlsenCoeff)^1.5 * ((TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/TRAYS(i).rhoL/PlateArea)-WeirHeight)^1.5 * 'm^0.5/mol';
858                       
859                                case "Feehery_Fl":
860                                TRAYS(i).OutletLiquid.F = WeirLength*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z) * ((TRAYS(i).Level-WeirHeight)/750/'mm')^1.5 * 'm^2/s';
861                       
862                                case "Roffel_Fl":
863                                TRAYS(i).OutletLiquid.F = 2/3*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z)*WeirLength*(TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/(PlateArea*1.3)/TRAYS(i).rhoL)^1.5*sqrt(2*g/
864                                                        (2*(1 - 0.3593/'Pa^0.0888545'*abs(TRAYS(i).OutletVapour.F*sum(Mw*TRAYS(i).OutletVapour.z)/(PlateArea*1.3)/sqrt(TRAYS(i).rhoV))^0.177709)-1)); #/'(kg/m)^0.0888545/s^0.177709';
865                        end
866                when TRAYS(i).Level < (AerationFraction *WeirHeight) switchto "off";
867               
868                case "off":
869                "Low level"
870                TRAYS(i).OutletLiquid.F = 0 * 'mol/h';
871                when TRAYS(i).Level > (AerationFraction * WeirHeight) switchto "on";
872        end
873       
874switch VapourFlow
875                case "on":
876                        switch VapourFlowModel
877                                case "Reepmeyer":
878                                TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/(TRAYS(i).rhoV*DryPdropCoeff))*HolesArea;
879                       
880                                case "Feehery_Fv":
881                                TRAYS(i).InletVapour.F = TRAYS(i).rhoV/PlateArea/FeeheryCoeff/sum(Mw*TRAYS(i).OutletVapour.z) * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-(TRAYS(i).rhoV*g*TRAYS(i).ML*TRAYS(i).vL/PlateArea))/TRAYS(i).rhoV);
882                       
883                                case "Roffel_Fv":
884                                TRAYS(i).InletVapour.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)*1e5 - (AerationFraction*sum(TRAYS(i).M*Mw)/(PlateArea*1.3)*g*1e5) * (TRAYS(i).rhoV*HolesArea/sum(Mw*TRAYS(i).OutletVapour.z))^1.08 * 'm^1.08/mol^1.08';
885                       
886                                case "Klingberg":
887                                TRAYS(i).InletVapour.F * TRAYS(i).vV = PlateArea * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV);
888                       
889                                case "Wang_Fv":
890                                TRAYS(i).InletVapour.F * TRAYS(i).vV = PlateArea * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV*DryPdropCoeff);
891                               
892                                case "Elgue":
893                                TRAYS(i).InletVapour.F  = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/ElgueCoeff);
894                        end
895                when TRAYS(i).InletVapour.F < 1e-6 * 'kmol/h' switchto "off";
896               
897                case "off":
898                TRAYS(i).InletVapour.F = 0 * 'mol/s';
899                when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P switchto "on";
900        end
901
902end
903
904end
905
906Model Distillation_kettle_cond                          as ColumnBasic
907
908ATTRIBUTES
909        Pallete         = true;
910        Icon            = "icon/DistillationKettleCond";
911        Brief           = "Model of a distillation column with dynamic condenser and dynamic reboiler.";
912        Info            =
913"== Specify ==
914* the feed stream of each tray (Inlet);
915* the Murphree eficiency for each tray Emv;
916* the pump pressure difference;
917* the heat supllied in reboiler and condenser;
918* the condenser vapor outlet flow (OutletVapour.F);
919* the reboiler liquid outlet flow (OutletLiquid.F);
920* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
921       
922== Initial Conditions ==
923* the TRAYS temperature (OutletLiquid.T);
924* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
925* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
926       
927* the condenser temperature (OutletLiquid.T);
928* the condenser liquid level (Level);
929* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
930       
931* the reboiler temperature (OutletLiquid.T);
932* the reboiler liquid level (Level);
933* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
934";
935
936SET
937        NumberOfFeeds = 1;
938       
939VARIABLES
940
941        CONDENSER               as condenser;
942        REBOILER                as reboiler;
943        SPLITTER                as splitter_column (Brief="splitter which separate reflux and distillate",Protected=true);
944        PUMP                    as pump;
945        RefluxRatio             as positive             (Brief="Reflux Ratio",Default=10, Lower = 0.5);
946       
947        out     TI_reb  as control_signal       (Brief="Temperature Indicator of Reboiler ",Protected = true, PosX=0.515, PosY=1);
948        out     LI_reb  as control_signal       (Brief="Level Indicator of Reboiler", Protected = true, PosX=1, PosY=0.935);
949        out     PI_reb  as control_signal       (Brief="Pressure Indicator of Reboiler", Protected = true, PosX=0.41, PosY=1);
950       
951        out     TI_cond         as control_signal       (Brief="Temperature Indicator of Condenser ", Protected = true, PosX=0.52, PosY=0);
952        out     LI_cond         as control_signal       (Brief="Level Indicator of Condenser", Protected = true, PosX=1, PosY=0.084);
953        out     PI_cond         as control_signal       (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.42, PosY=0);
954       
955        in      FeedTray        as stream               (Brief="Feed stream", PosX=0, PosY=0.55);
956
957
958
959        in      HeatToReboiler  as power (Brief="Heat supplied to Reboiler",Protected = true, PosX=1, PosY=0.855);
960        in      HeatToCondenser as power (Brief="Heat supplied to Condenser", Protected = true, PosX=1, PosY=0.01);
961
962
963        ConnectorHeatReboiler   as power        (Brief="Heat supplied to Reboiler", Hidden=true);
964        ConnectorHeatCondenser  as power        (Brief="Heat supplied to Condenser", Hidden=true);
965       
966        in      ConnectorCondenserVout  as stream       (Brief="Connector for Vapour outlet stream From Condenser", Hidden=true);
967        in      ConnectorReboilerLout   as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
968        in      ConnectorSplitterOut    as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
969
970        out     VapourDistillate        as vapour_stream        (Brief="Vapour outlet stream From Condenser", PosX=0.615, PosY=0);
971        out     LiquidDistillate        as liquid_stream        (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.235);
972        out     BottomProduct           as liquid_stream        (Brief="Liquid outlet stream From Reboiler", PosX=0.62, PosY=1);
973
974EQUATIONS
975
976        SPLITTER.RefluxRatio = RefluxRatio;
977
978        TI_reb  = REBOILER.TI ;
979        LI_reb  = REBOILER.LI;
980        PI_reb  = REBOILER.PI;
981       
982        TI_cond = CONDENSER.TI;
983        LI_cond = CONDENSER.LI;
984        PI_cond = CONDENSER.PI;
985       
986for i in 1:NumberOfTrays do
987
988if i equal FeedTrayLocation(1) then   
989
990"FeedTrayTop Inlet Flow"       
991        FeedTray.F= TRAYS(i).Inlet.F;
992
993"FeedTrayTop Inlet Temperature"
994        FeedTray.T = TRAYS(i).Inlet.T;
995
996"FeedTrayTop Inlet Pressure"
997        FeedTray.P = TRAYS(i).Inlet.P;
998
999"FeedTrayTop Inlet Composition"
1000        FeedTray.z = TRAYS(i).Inlet.z;
1001
1002"FeedTrayTop Inlet Vapour Fraction"
1003        FeedTray.v = TRAYS(i).Inlet.v;
1004
1005"FeedTrayTop Inlet Enthalpy"
1006        FeedTray.h = TRAYS(i).Inlet.h;
1007
1008else
1009
1010"Inlet Tray - Flow Sealed"
1011    0*'mol/h'= TRAYS(i).Inlet.F;
1012       
1013"Inlet Tray -  Temperature"
1014    300*'K' = TRAYS(i).Inlet.T;
1015       
1016"Inlet Tray -  Pressure"
1017    1*'atm' = TRAYS(i).Inlet.P;
1018       
1019"Inlet Tray -  Composition"
1020    0.1 = TRAYS(i).Inlet.z;
1021       
1022"Inlet Tray -  Vapour Fraction"
1023    0 = TRAYS(i).Inlet.v;
1024       
1025"Inlet Tray -  Enthalpy"
1026    0*'J/mol' = TRAYS(i).Inlet.h;
1027
1028end
1029
1030end
1031
1032# Condenser Connector Equations
1033        ConnectorCondenserVout.T = VapourDistillate.T;
1034        ConnectorCondenserVout.P = VapourDistillate.P;
1035        ConnectorCondenserVout.F = VapourDistillate.F;
1036        ConnectorCondenserVout.z = VapourDistillate.z;
1037
1038# Splitter Connector Equations
1039        ConnectorSplitterOut.T = LiquidDistillate.T;
1040        ConnectorSplitterOut.P = LiquidDistillate.P;
1041        ConnectorSplitterOut.F = LiquidDistillate.F;
1042        ConnectorSplitterOut.z = LiquidDistillate.z;
1043
1044# Reboiler Connector Equations
1045        ConnectorReboilerLout.T = BottomProduct.T;
1046        ConnectorReboilerLout.P = BottomProduct.P;
1047        ConnectorReboilerLout.F = BottomProduct.F;
1048        ConnectorReboilerLout.z = BottomProduct.z;
1049
1050        HeatToReboiler  = ConnectorHeatReboiler;
1051        HeatToCondenser = ConnectorHeatCondenser;
1052
1053CONNECTIONS
1054#vapor
1055        REBOILER.OutletVapour   to      TRAYS(NumberOfTrays).InletVapour;
1056        TRAYS(1).OutletVapour   to      CONDENSER.InletVapour;
1057
1058#liquid
1059        CONDENSER.OutletLiquid                          to      SPLITTER.Inlet;
1060        SPLITTER.Reflux                                         to      PUMP.Inlet;
1061        PUMP.Outlet                                             to      TRAYS(1).InletLiquid;
1062        TRAYS(NumberOfTrays).OutletLiquid       to      REBOILER.InletLiquid;
1063
1064#Connectors
1065        CONDENSER.OutletVapour  to ConnectorCondenserVout;
1066        SPLITTER.Distillate             to ConnectorSplitterOut;
1067        REBOILER.OutletLiquid   to ConnectorReboilerLout;
1068
1069        ConnectorHeatReboiler   to REBOILER.InletQ;
1070        ConnectorHeatCondenser  to CONDENSER.InletQ;
1071
1072end
1073
1074Model Distillation_thermosyphon_subcooling      as ColumnBasic
1075        ATTRIBUTES
1076        Pallete         = true;
1077        Icon            = "icon/DistillationThermosyphonSubcooling";
1078        Brief           = "Model of a distillation column with steady condenser and steady reboiler.";
1079        Info            =
1080"== Specify ==
1081* the feed stream of each tray (Inlet);
1082* the Murphree eficiency for each tray Emv;
1083* the pump head;
1084* the condenser pressure drop;
1085* the heat supllied in top and bottom tanks;
1086* the heat supllied in condenser and reboiler;
1087* the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product;
1088* both  top splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
1089       
1090== Initial Conditions ==
1091* the TRAYS temperature (OutletLiquid.T);
1092* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
1093* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
1094       
1095* the top tank temperature (OutletLiquid.T);
1096* the top tank liquid level (Level);
1097* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
1098       
1099* the bottom tank temperature (OutletLiquid.T);
1100* the bottom tank liquid level (Level);
1101* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
1102";
1103
1104SET
1105
1106        NumberOfFeeds = 1;
1107
1108VARIABLES
1109        CONDENSER                       as condenserSteady      (Brief="steady state condenser with subcooling");
1110        REFLUX_DRUM             as TankL                        (Brief="Reflux Drum");
1111        SPLITTER_TOP            as splitter_column      (Brief="splitter which separate reflux and distillate",Protected=true);
1112        PUMP                            as pump                         (Brief="pump in reflux stream");
1113        REBOILER                        as reboilerSteady       (Brief="steady state reboiler (thermosyphon)");
1114        SUMP                            as SumpTank                     (Brief="vessel in the bottom of column");
1115        SPLITTER_BOTTOM         as splitter2            (Brief="splitter to separate the bottom product and the stream to reboiler");
1116       
1117        in      FeedTray        as stream               (Brief="Feed stream", PosX=0, PosY=0.55);
1118
1119        RefluxRatio             as positive             (Brief="Reflux Ratio",Default=10, Lower = 0.5);
1120
1121in              Q_cond          as power        (Brief="Heat supplied to Condenser",PosX=1, PosY=0, Protected=true);
1122in              Q_reb           as power        (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.96,Protected=true);
1123in              Q_drum  as power        (Brief="Heat supplied to Reflux Drum", PosX=1, PosY=0.30,Protected=true);
1124
1125        out     TI_reb  as control_signal       (Brief="Temperature Indicator of Reboiler ",Protected = true, PosX=1, PosY=0.92);
1126        out     PI_reb  as control_signal       (Brief="Pressure Indicator of Reboiler", Protected = true, PosX=1, PosY=0.875);
1127       
1128        out     TI_cond         as control_signal       (Brief="Temperature Indicator of Condenser ", Protected = true, PosX=0.52, PosY=0);
1129        out     PI_cond         as control_signal       (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.42, PosY=0);
1130       
1131        out     TI_drum as control_signal       (Brief="Temperature Indicator of Reflux Drum ", Protected = true, PosX=1, PosY=0.20);
1132        out     PI_drum as control_signal       (Brief="Pressure Indicator of Reflux Drum", Protected = true, PosX=1, PosY=0.155);
1133        out     LI_drum as control_signal       (Brief="Level Indicator of Reflux Drum", Protected = true, PosX=1, PosY=0.24);
1134       
1135        out     LI_sump as control_signal       (Brief="Level Indicator of Column Sump", Protected = true, PosX=1, PosY=0.765);
1136        out     TI_sump as control_signal       (Brief="Temperature Indicator of Column Sump ",Protected = true, PosX=1, PosY=0.71);
1137       
1138        out     LiquidDistillate        as liquid_stream        (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.33);
1139        out     BottomProduct           as liquid_stream        (Brief="Liquid outlet stream From Bottom Splitter", PosX=0.06, PosY=1);
1140
1141        in      ConnectorSplitterBottom         as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
1142        in      ConnectorSplitterTop            as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
1143
1144        ConnectorHeatReboiler           as power        (Brief="Connector for Heat supplied to Reboiler", Hidden=true);
1145        ConnectorHeatCondenser          as power        (Brief="Connector for Heat supplied to Condenser", Hidden=true);
1146        ConnectorHeatRefluxDrum         as power        (Brief="Connector for Heat supplied to Reflux Drum", Hidden=true);
1147
1148EQUATIONS
1149
1150        SPLITTER_TOP.RefluxRatio = RefluxRatio;
1151        TI_reb  = REBOILER.TI ;
1152        PI_reb  = REBOILER.PI;
1153       
1154        TI_cond = CONDENSER.TI;
1155        PI_cond = CONDENSER.PI;
1156       
1157        TI_drum = REFLUX_DRUM.TI;
1158        PI_drum = REFLUX_DRUM.PI;
1159        LI_drum = REFLUX_DRUM.LI;
1160       
1161        TI_sump = SUMP.TI;
1162        LI_sump = SUMP.LI;
1163       
1164for i in 1:NumberOfTrays do
1165
1166if i equal FeedTrayLocation(1) then   
1167
1168"FeedTrayTop Inlet Flow"       
1169        FeedTray.F= TRAYS(i).Inlet.F;
1170
1171"FeedTrayTop Inlet Temperature"
1172        FeedTray.T = TRAYS(i).Inlet.T;
1173
1174"FeedTrayTop Inlet Pressure"
1175        FeedTray.P = TRAYS(i).Inlet.P;
1176
1177"FeedTrayTop Inlet Composition"
1178        FeedTray.z = TRAYS(i).Inlet.z;
1179
1180"FeedTrayTop Inlet Vapour Fraction"
1181        FeedTray.v = TRAYS(i).Inlet.v;
1182
1183"FeedTrayTop Inlet Enthalpy"
1184        FeedTray.h = TRAYS(i).Inlet.h;
1185
1186else
1187
1188"Inlet Tray - Flow Sealed"
1189    0*'mol/h'= TRAYS(i).Inlet.F;
1190       
1191"Inlet Tray -  Temperature"
1192    300*'K' = TRAYS(i).Inlet.T;
1193       
1194"Inlet Tray -  Pressure"
1195    1*'atm' = TRAYS(i).Inlet.P;
1196       
1197"Inlet Tray -  Composition"
1198    0.1 = TRAYS(i).Inlet.z;
1199       
1200"Inlet Tray -  Vapour Fraction"
1201    0 = TRAYS(i).Inlet.v;
1202       
1203"Inlet Tray -  Enthalpy"
1204    0*'J/mol' = TRAYS(i).Inlet.h;
1205
1206end
1207
1208end
1209
1210# Heat Connector Equations
1211        Q_cond  =       ConnectorHeatCondenser;
1212        Q_reb   =       ConnectorHeatReboiler;
1213        Q_drum  =       ConnectorHeatRefluxDrum;
1214
1215# Top Splitter Connector Equations
1216        ConnectorSplitterTop.T = LiquidDistillate.T;
1217        ConnectorSplitterTop.P = LiquidDistillate.P;
1218        ConnectorSplitterTop.F = LiquidDistillate.F;
1219        ConnectorSplitterTop.z = LiquidDistillate.z;
1220
1221# Bottom Splitter Connector Equations
1222        ConnectorSplitterBottom.T = BottomProduct.T;
1223        ConnectorSplitterBottom.P = BottomProduct.P;
1224        ConnectorSplitterBottom.F = BottomProduct.F;
1225        ConnectorSplitterBottom.z = BottomProduct.z;
1226       
1227CONNECTIONS
1228#vapor
1229        REBOILER.OutletVapour   to SUMP.InletVapour;
1230        SUMP.OutletVapour               to TRAYS(NumberOfTrays).InletVapour;
1231        TRAYS(1).OutletVapour   to CONDENSER.InletVapour;
1232
1233#liquid
1234        CONDENSER.OutletLiquid                          to REFLUX_DRUM.Inlet;   
1235        REFLUX_DRUM.OutletLiquid                        to SPLITTER_TOP.Inlet;
1236        SPLITTER_TOP.Reflux                     to PUMP.Inlet; 
1237        PUMP.Outlet                                     to TRAYS(1).InletLiquid;
1238        TRAYS(NumberOfTrays).OutletLiquid       to SUMP.InletLiquid;
1239        SUMP.OutletLiquid               to SPLITTER_BOTTOM.Inlet;
1240        SPLITTER_BOTTOM.Outlet2                 to REBOILER.InletLiquid;
1241
1242#Connectors
1243        ConnectorHeatCondenser                  to CONDENSER.InletQ;
1244        ConnectorHeatReboiler                   to REBOILER.InletQ;
1245        ConnectorHeatRefluxDrum                 to REFLUX_DRUM.InletQ;
1246        SPLITTER_TOP.Distillate                 to ConnectorSplitterTop;
1247        SPLITTER_BOTTOM.Outlet1                 to ConnectorSplitterBottom;
1248
1249end
1250
1251Model Distillation_thermosyphon_cond            as ColumnBasic
1252        ATTRIBUTES
1253        Pallete         = true;
1254        Icon            = "icon/DistillationThermosyphonCond";
1255        Brief           = "Model of a distillation column with dynamic condenser and steady reboiler.";
1256        Info            =
1257"== Specify ==
1258* the feed stream of each tray (Inlet);
1259* the Murphree eficiency for each tray Emv;
1260* the pump head;
1261* the condenser vapor outlet flow (OutletVapour.F);
1262* the heat supllied in bottom tank;
1263* the heat supllied in condenser and reboiler;
1264* the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product;
1265       
1266== Initial Conditions ==
1267* the TRAYS temperature (OutletLiquid.T);
1268* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
1269* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
1270       
1271* the condenser temperature (OutletLiquid.T);
1272* the condenser liquid level (Level);
1273* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
1274       
1275* the bottom tank temperature (OutletLiquid.T);
1276* the bottom tank liquid level (Level);
1277* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
1278";
1279
1280SET
1281
1282        NumberOfFeeds = 1;
1283
1284VARIABLES
1285        CONDENSER                       as condenser            (Brief="dynamic condenser without subcooling");
1286        SPLITTER_TOP            as splitter_column      (Brief="splitter which separate reflux and distillate",Protected=true);
1287        PUMP                            as pump                         (Brief="pump in reflux stream");
1288        SUMP                            as SumpTank                     (Brief="vessel in the bottom of column");
1289        SPLITTER_BOTTOM         as splitter2            (Brief="splitter who separate the bottom product and the stream to reboiler");
1290        REBOILER                        as reboilerSteady       (Brief="steady state reboiler (thermosyphon)");
1291        RefluxRatio                     as positive             (Brief="Reflux Ratio",Default=10, Lower = 0.5);
1292       
1293        in      FeedTray        as stream       (Brief="Feed stream", PosX=0, PosY=0.55);
1294
1295in              Q_cond  as power        (Brief="Heat supplied to Condenser",PosX=1, PosY=0, Protected=true);
1296in              Q_reb   as power        (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.96,Protected=true);
1297
1298        out     TI_cond as control_signal       (Brief="Temperature Indicator of Condenser ", Protected = true, PosX=0.48, PosY=0);
1299        out     LI_cond as control_signal       (Brief="Level Indicator of Condenser", Protected = true, PosX=1, PosY=0.084);
1300        out     PI_cond as control_signal       (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.40, PosY=0);
1301       
1302        out     TI_reb  as control_signal       (Brief="Temperature Indicator of Reboiler ",Protected = true, PosX=1, PosY=0.92);
1303        out     PI_reb  as control_signal       (Brief="Pressure Indicator of Reboiler", Protected = true, PosX=1, PosY=0.878);
1304       
1305        out     LI_sump as control_signal       (Brief="Level Indicator of Column Sump", Protected = true, PosX=1, PosY=0.76);
1306        out     TI_sump as control_signal       (Brief="Temperature Indicator of Column Sump ",Protected = true, PosX=1, PosY=0.71);
1307       
1308out     VapourDistillate as vapour_stream       (Brief="Vapour outlet stream From Top Condenser", PosX=0.62, PosY=0);
1309out     LiquidDistillate as liquid_stream       (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.185);
1310out     BottomProduct    as liquid_stream       (Brief="Liquid outlet stream From Bottom Splitter", PosX=0.06, PosY=1);
1311
1312in      ConnectorSplitterBottom as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
1313in      ConnectorSplitterTop    as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
1314in      ConnectorCondenserVout  as stream       (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true);
1315
1316        ConnectorHeatReboiler   as power        (Brief="Connector for Heat supplied to Reboiler", Hidden=true);
1317        ConnectorHeatCondenser  as power        (Brief="Connector for Heat supplied to Condenser", Hidden=true);
1318
1319EQUATIONS
1320
1321for i in 1:NumberOfTrays do
1322
1323if i equal FeedTrayLocation(1) then   
1324
1325"FeedTrayTop Inlet Flow"       
1326        FeedTray.F= TRAYS(i).Inlet.F;
1327
1328"FeedTrayTop Inlet Temperature"
1329        FeedTray.T = TRAYS(i).Inlet.T;
1330
1331"FeedTrayTop Inlet Pressure"
1332        FeedTray.P = TRAYS(i).Inlet.P;
1333
1334"FeedTrayTop Inlet Composition"
1335        FeedTray.z = TRAYS(i).Inlet.z;
1336
1337"FeedTrayTop Inlet Vapour Fraction"
1338        FeedTray.v = TRAYS(i).Inlet.v;
1339
1340"FeedTrayTop Inlet Enthalpy"
1341        FeedTray.h = TRAYS(i).Inlet.h;
1342
1343else
1344
1345"Inlet Tray - Flow Sealed"
1346    0*'mol/h'= TRAYS(i).Inlet.F;
1347       
1348"Inlet Tray -  Temperature"
1349    300*'K' = TRAYS(i).Inlet.T;
1350       
1351"Inlet Tray -  Pressure"
1352    1*'atm' = TRAYS(i).Inlet.P;
1353       
1354"Inlet Tray -  Composition"
1355    0.1 = TRAYS(i).Inlet.z;
1356       
1357"Inlet Tray -  Vapour Fraction"
1358    0 = TRAYS(i).Inlet.v;
1359       
1360"Inlet Tray -  Enthalpy"
1361    0*'J/mol' = TRAYS(i).Inlet.h;
1362
1363end
1364
1365end
1366
1367        SPLITTER_TOP.RefluxRatio = RefluxRatio;
1368
1369        TI_reb  = REBOILER.TI ;
1370        PI_reb  = REBOILER.PI;
1371       
1372        TI_cond = CONDENSER.TI;
1373        PI_cond = CONDENSER.PI;
1374        LI_cond = CONDENSER.LI;
1375       
1376        TI_sump = SUMP.TI;
1377        LI_sump = SUMP.LI;
1378       
1379# Heat Connector Equations
1380        Q_cond  =       ConnectorHeatCondenser;
1381        Q_reb   =       ConnectorHeatReboiler;
1382
1383# Condenser Connector Equations
1384        ConnectorCondenserVout.T = VapourDistillate.T;
1385        ConnectorCondenserVout.P = VapourDistillate.P;
1386        ConnectorCondenserVout.F = VapourDistillate.F;
1387        ConnectorCondenserVout.z = VapourDistillate.z;
1388
1389# Top Splitter Connector Equations
1390        ConnectorSplitterTop.T = LiquidDistillate.T;
1391        ConnectorSplitterTop.P = LiquidDistillate.P;
1392        ConnectorSplitterTop.F = LiquidDistillate.F;
1393        ConnectorSplitterTop.z = LiquidDistillate.z;
1394
1395# Bottom Splitter Connector Equations
1396        ConnectorSplitterBottom.T = BottomProduct.T;
1397        ConnectorSplitterBottom.P = BottomProduct.P;
1398        ConnectorSplitterBottom.F = BottomProduct.F;
1399        ConnectorSplitterBottom.z = BottomProduct.z;
1400
1401CONNECTIONS
1402#vapor
1403        SUMP.OutletVapour               to TRAYS(NumberOfTrays).InletVapour;
1404        REBOILER.OutletVapour   to SUMP.InletVapour;
1405        TRAYS(1).OutletVapour   to CONDENSER.InletVapour;
1406
1407#liquid
1408        CONDENSER.OutletLiquid          to SPLITTER_TOP.Inlet; 
1409        SPLITTER_TOP.Reflux                             to PUMP.Inlet;
1410        PUMP.Outlet                                     to TRAYS(1).InletLiquid;
1411        TRAYS(NumberOfTrays).OutletLiquid       to SUMP.InletLiquid;
1412        SUMP.OutletLiquid                               to SPLITTER_BOTTOM.Inlet;
1413        SPLITTER_BOTTOM.Outlet2                         to REBOILER.InletLiquid;
1414
1415#Connectors
1416ConnectorHeatCondenser                  to CONDENSER.InletQ;
1417ConnectorHeatReboiler                   to REBOILER.InletQ;
1418CONDENSER.OutletVapour                  to ConnectorCondenserVout;
1419SPLITTER_TOP.Distillate                 to ConnectorSplitterTop;
1420SPLITTER_BOTTOM.Outlet1                 to ConnectorSplitterBottom;
1421
1422end
1423
1424Model Distillation_kettle_subcooling            as ColumnBasic
1425
1426ATTRIBUTES
1427        Pallete         = true;
1428        Icon            = "icon/DistillationKettleSubcooling";
1429        Brief   = "Model of a distillation column with steady condenser and dynamic reboiler.";
1430        Info            =
1431"== Specify ==
1432* the feed stream of each tray (Inlet);
1433* the Murphree eficiency for each tray (Emv);
1434* the pump pressure difference;
1435* the heat supllied in reboiler and condenser;
1436* the heat supllied in the top tank;
1437* the condenser pressure drop;
1438* the reboiler liquid outlet flow (OutletLiquid.F);
1439* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
1440       
1441== Initial Conditions ==
1442* the TRAYS temperature (OutletLiquid.T);
1443* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
1444* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
1445       
1446* the top tank temperature (OutletLiquid.T);
1447* the top tank liquid level (Level);
1448* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
1449       
1450* the reboiler temperature (OutletLiquid.T);
1451* the reboiler liquid level (Level);
1452* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
1453";
1454
1455SET
1456
1457        NumberOfFeeds = 1;
1458
1459VARIABLES
1460        CONDENSER               as condenserSteady      (Brief="steady state condenser with subcooling");
1461        REFLUX_DRUM             as TankL                        (Brief="reflux drum");
1462        SPLITTER                as splitter_column              (Brief="splitter to separate reflux and distillate",Protected=true);
1463        PUMP                    as pump                         (Brief="pump in reflux stream");
1464        REBOILER                as reboiler                     (Brief="kettle reboiler");
1465
1466        RefluxRatio                     as positive             (Brief="Reflux Ratio",Default=10, Lower = 0.5);
1467
1468        in      Q_cond  as power        (Brief="Heat supplied to Condenser", PosX=1, PosY=0.065, Protected=true);
1469        in      Q_reb   as power        (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.905, Protected=true);
1470        in      Q_drum  as power        (Brief="Heat supplied to Top Vessel", PosX=1, PosY=0.30, Protected=true);
1471
1472        in      FeedTray        as stream               (Brief="Feed stream", PosX=0, PosY=0.55);
1473
1474        out     TI_reb  as control_signal       (Brief="Temperature Indicator of Reboiler ",Protected = true, PosX=0.515, PosY=1);
1475        out     LI_reb  as control_signal       (Brief="Level Indicator of Reboiler", Protected = true, PosX=1, PosY=0.935);
1476        out     PI_reb  as control_signal       (Brief="Pressure Indicator of Reboiler", Protected = true, PosX=0.41, PosY=1);
1477       
1478        out     TI_cond as control_signal       (Brief="Temperature Indicator of Condenser ", Protected = true, PosX=0.52, PosY=0);
1479        out     PI_cond as control_signal       (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.42, PosY=0);
1480       
1481        out     TI_drum as control_signal       (Brief="Temperature Indicator of Reflux Drum ", Protected = true, PosX=1, PosY=0.20);
1482        out     PI_drum as control_signal       (Brief="Pressure Indicator of Reflux Drum", Protected = true, PosX=1, PosY=0.155);
1483        out     LI_drum as control_signal       (Brief="Level Indicator of Reflux Drum", Protected = true, PosX=1, PosY=0.24);
1484       
1485       
1486in      ConnectorSplitterOut            as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
1487in      ConnectorReboilerLout           as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
1488        ConnectorHeatReboiler           as power        (Brief="Connector for Heat supplied to Reboiler", Hidden=true);
1489        ConnectorHeatCondenser          as power        (Brief="Connector for Heat supplied to Condenser", Hidden=true);
1490        ConnectorHeatAccumulator        as power        (Brief="Connector for Heat supplied to TopVessel", Hidden=true);
1491
1492out     LiquidDistillate as liquid_stream       (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.33);
1493out     BottomProduct    as liquid_stream       (Brief="Liquid outlet stream From Reboiler", PosX=0.67, PosY=1);
1494
1495EQUATIONS
1496
1497        SPLITTER.RefluxRatio = RefluxRatio;
1498
1499        TI_reb  = REBOILER.TI ;
1500        PI_reb  = REBOILER.PI;
1501        LI_reb  = REBOILER.LI;
1502       
1503        TI_cond = CONDENSER.TI;
1504        PI_cond = CONDENSER.PI;
1505       
1506        TI_drum = REFLUX_DRUM.TI;
1507        PI_drum = REFLUX_DRUM.PI;
1508        LI_drum = REFLUX_DRUM.LI;
1509       
1510for i in 1:NumberOfTrays do
1511
1512if i equal FeedTrayLocation(1) then   
1513
1514"FeedTrayTop Inlet Flow"       
1515        FeedTray.F= TRAYS(i).Inlet.F;
1516
1517"FeedTrayTop Inlet Temperature"
1518        FeedTray.T = TRAYS(i).Inlet.T;
1519
1520"FeedTrayTop Inlet Pressure"
1521        FeedTray.P = TRAYS(i).Inlet.P;
1522
1523"FeedTrayTop Inlet Composition"
1524        FeedTray.z = TRAYS(i).Inlet.z;
1525
1526"FeedTrayTop Inlet Vapour Fraction"
1527        FeedTray.v = TRAYS(i).Inlet.v;
1528
1529"FeedTrayTop Inlet Enthalpy"
1530        FeedTray.h = TRAYS(i).Inlet.h;
1531
1532else
1533
1534"Inlet Tray - Flow Sealed"
1535    0*'mol/h'= TRAYS(i).Inlet.F;
1536       
1537"Inlet Tray -  Temperature"
1538    300*'K' = TRAYS(i).Inlet.T;
1539       
1540"Inlet Tray -  Pressure"
1541    1*'atm' = TRAYS(i).Inlet.P;
1542       
1543"Inlet Tray -  Composition"
1544    0.1 = TRAYS(i).Inlet.z;
1545       
1546"Inlet Tray -  Vapour Fraction"
1547    0 = TRAYS(i).Inlet.v;
1548       
1549"Inlet Tray -  Enthalpy"
1550    0*'J/mol' = TRAYS(i).Inlet.h;
1551
1552end
1553
1554end
1555
1556#Heat Connectors
1557        Q_cond  = ConnectorHeatCondenser;
1558        Q_reb   = ConnectorHeatReboiler;
1559        Q_drum  = ConnectorHeatAccumulator;
1560
1561# Splitter Connector Equations
1562        ConnectorSplitterOut.T = LiquidDistillate.T;
1563        ConnectorSplitterOut.P = LiquidDistillate.P;
1564        ConnectorSplitterOut.F = LiquidDistillate.F;
1565        ConnectorSplitterOut.z = LiquidDistillate.z;
1566
1567# Reboiler Connector Equations
1568        ConnectorReboilerLout.T = BottomProduct.T;
1569        ConnectorReboilerLout.P = BottomProduct.P;
1570        ConnectorReboilerLout.F = BottomProduct.F;
1571        ConnectorReboilerLout.z = BottomProduct.z;
1572
1573CONNECTIONS
1574#vapor
1575        REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour;
1576        TRAYS(1).OutletVapour to CONDENSER.InletVapour;
1577
1578#liquid
1579        CONDENSER.OutletLiquid                          to REFLUX_DRUM.Inlet;   
1580        REFLUX_DRUM.OutletLiquid                        to SPLITTER.Inlet;
1581        SPLITTER.Reflux                                         to PUMP.Inlet; 
1582        PUMP.Outlet                                             to TRAYS(1).InletLiquid;
1583        TRAYS(NumberOfTrays).OutletLiquid       to REBOILER.InletLiquid;
1584
1585#Connectors
1586        ConnectorHeatCondenser          to CONDENSER.InletQ;
1587        ConnectorHeatReboiler           to REBOILER.InletQ;
1588        ConnectorHeatAccumulator        to REFLUX_DRUM.InletQ;
1589
1590        SPLITTER.Distillate             to ConnectorSplitterOut;
1591        REBOILER.OutletLiquid   to ConnectorReboilerLout;
1592
1593end
1594
1595Model Rectifier                                                         as ColumnBasic
1596
1597ATTRIBUTES
1598        Pallete         = true;
1599        Icon            = "icon/RefluxedCond";
1600        Brief           = "Model of a rectifier column with dynamic condenser.";
1601        Info            =
1602"== Specify ==
1603* the feed stream of each tray (Inlet);
1604* the Murphree eficiency for each tray Emv;
1605* the InletVapour stream of the bottom tray unless its flow;
1606* the pump pressure difference;
1607* the heat supllied in the condenser;
1608* the condenser vapor outlet flow (OutletVapour.F);
1609* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
1610       
1611== Initial Conditions ==
1612* the TRAYS temperature (OutletLiquid.T);
1613* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
1614* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
1615       
1616* the condenser temperature (OutletLiquid.T);
1617* the condenser liquid level (Level);
1618* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
1619";
1620
1621SET
1622        NumberOfFeeds = 1;
1623
1624VARIABLES
1625        CONDENSER       as condenser    (Brief="dymamic condenser without subcooling");
1626        SPLITTER        as splitter2    (Brief="splitter which separate reflux and distillate");
1627        PUMP            as pump                 (Brief="pump in reflux stream");
1628
1629        out     TI_cond         as control_signal       (Brief="Temperature Indicator of Condenser ", Protected = true, PosX=0.52, PosY=0);
1630        out     LI_cond         as control_signal       (Brief="Level Indicator of Condenser", Protected = true, PosX=1, PosY=0.084);
1631        out     PI_cond         as control_signal       (Brief="Pressure Indicator of Condenser", Protected = true, PosX=0.42, PosY=0);
1632       
1633        in      FeedTray        as stream               (Brief="Feed stream", PosX=0, PosY=0.55);
1634       
1635        out     VapourDistillate        as vapour_stream        (Brief="Vapour outlet stream From Top Condenser", PosX=0.66, PosY=0);
1636        out     LiquidDistillate        as liquid_stream        (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.24);
1637
1638        in      Q_cond          as power (Brief="Heat supplied to Condenser",PosX=1, PosY=0.04, Protected = true);
1639
1640        in      VapourInlet             as stream                       (Brief="Vapour Inlet in the section", PosX=0.07, PosY=1);
1641        out     LiquidOutlet    as liquid_stream        (Brief="Liquid Outlet in the section", PosX=0.32, PosY=1);
1642
1643        in      ConnectorSplitterOut    as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
1644        in      ConnectorCondenserVout  as stream       (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true);
1645                VapourConnector                 as stream       (Brief="Vapour connection at the middle TRAYS", PosX=0.55, PosY=0,Hidden=true);
1646                ConnectorHeatCondenser  as power        (Brief="Connector for Heat supplied to Condenser", Hidden=true);
1647       
1648EQUATIONS
1649
1650        TI_cond = CONDENSER.TI;
1651        LI_cond = CONDENSER.LI;
1652        PI_cond = CONDENSER.PI;
1653       
1654for i in 1:NumberOfTrays do
1655
1656if i equal FeedTrayLocation(1) then   
1657
1658"FeedTrayTop Inlet Flow"       
1659        FeedTray.F= TRAYS(i).Inlet.F;
1660
1661"FeedTrayTop Inlet Temperature"
1662        FeedTray.T = TRAYS(i).Inlet.T;
1663
1664"FeedTrayTop Inlet Pressure"
1665        FeedTray.P = TRAYS(i).Inlet.P;
1666
1667"FeedTrayTop Inlet Composition"
1668        FeedTray.z = TRAYS(i).Inlet.z;
1669
1670"FeedTrayTop Inlet Vapour Fraction"
1671        FeedTray.v = TRAYS(i).Inlet.v;
1672
1673"FeedTrayTop Inlet Enthalpy"
1674        FeedTray.h = TRAYS(i).Inlet.h;
1675
1676else
1677
1678"Inlet Tray - Flow Sealed"
1679    0*'mol/h'= TRAYS(i).Inlet.F;
1680       
1681"Inlet Tray -  Temperature"
1682    300*'K' = TRAYS(i).Inlet.T;
1683       
1684"Inlet Tray -  Pressure"
1685    1*'atm' = TRAYS(i).Inlet.P;
1686       
1687"Inlet Tray -  Composition"
1688    0.1 = TRAYS(i).Inlet.z;
1689       
1690"Inlet Tray -  Vapour Fraction"
1691    0 = TRAYS(i).Inlet.v;
1692       
1693"Inlet Tray -  Enthalpy"
1694    0*'J/mol' = TRAYS(i).Inlet.h;
1695
1696end
1697
1698end
1699
1700        Q_cond = ConnectorHeatCondenser;
1701
1702# Condenser Connector Equations
1703        ConnectorCondenserVout.T = VapourDistillate.T;
1704        ConnectorCondenserVout.P = VapourDistillate.P;
1705        ConnectorCondenserVout.F = VapourDistillate.F;
1706        ConnectorCondenserVout.z = VapourDistillate.z;
1707       
1708# Splitter Connector Equations
1709        ConnectorSplitterOut.T = LiquidDistillate.T;
1710        ConnectorSplitterOut.P = LiquidDistillate.P;
1711        ConnectorSplitterOut.F = LiquidDistillate.F;
1712        ConnectorSplitterOut.z = LiquidDistillate.z;
1713       
1714        LiquidOutlet.F= TRAYS(NumberOfTrays).OutletLiquid.F;
1715        LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T;
1716        LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P;
1717        LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z;
1718
1719        VapourConnector.F= VapourInlet.F;
1720        VapourConnector.T = VapourInlet.T;
1721        VapourConnector.P = VapourInlet.P;
1722        VapourConnector.z = VapourInlet.z;
1723        VapourConnector.v = VapourInlet.v;
1724        VapourConnector.h = VapourInlet.h;
1725
1726CONNECTIONS
1727#vapor
1728        TRAYS(1).OutletVapour to CONDENSER.InletVapour;
1729
1730#liquid
1731        CONDENSER.OutletLiquid  to SPLITTER.Inlet;     
1732        SPLITTER.Outlet2        to PUMP.Inlet; 
1733        PUMP.Outlet             to TRAYS(1).InletLiquid;
1734
1735#Connectors
1736ConnectorHeatCondenser  to CONDENSER.InletQ;
1737VapourConnector                 to TRAYS(NumberOfTrays).InletVapour;
1738SPLITTER.Outlet1                to ConnectorSplitterOut;
1739CONDENSER.OutletVapour  to ConnectorCondenserVout;
1740
1741end
1742
1743
1744
1745Model Packed_Section_ColumnBasic
1746
1747ATTRIBUTES
1748        Pallete         = false;
1749        Icon            = "icon/PackedSectionColumn";
1750        Brief           = "Model of a packed column section.";
1751        Info            =
1752"== Model of a packed column section containing ==
1753* NStages theoretical stages.
1754       
1755== Specify ==
1756* the feed stream of each tray (Inlet);
1757* the InletLiquid stream of the top tray;
1758* the InletVapour stream of the bottom tray;
1759* the total pressure drop (dP) of the section.
1760       
1761== Initial Conditions ==
1762* the stages temperature (OutletLiquid.T);
1763* the stages liquid holdup;
1764* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
1765";
1766       
1767PARAMETERS
1768
1769        outer PP                as Plugin       (Brief = "External Physical Properties", Type="PP");
1770        outer NComp     as Integer      (Brief="Number of components");
1771       
1772        low_flow                as flow_mol     (Brief ="Low Flow",Default = 1E-6, Hidden=true);
1773        low_pressure    as pressure     (Brief ="Low Pressure",Default = 1E-6, Hidden=true);
1774        zero_flow               as flow_mol     (Brief ="No Flow",Default = 0, Hidden=true);
1775       
1776        NumberOfFeeds                                           as Integer      (Brief="Number of Feed Stages",Default=3,Protected=true);
1777        NumberOfStages                                          as Integer      (Brief="Number of Stages", Default=3);
1778        FeedStageLocation(NumberOfFeeds)        as Integer      (Brief="Feed Stage Location",Default=2);
1779       
1780        PackingHeight           as length               (Brief="Height of packing");
1781        HeatSupply                      as heat_rate    (Brief="Rate of heat supply");
1782        ColumnDiameter          as length               (Brief="Column diameter");
1783        VoidFraction            as Real                 (Brief="Void fraction of packing, (m^3 void space/m^3 packed bed)");
1784        ResistanceCoeff         as positive     (Brief="Resistance coefficient on the liquid load", Default=1);
1785        AreaPerPackingVol       as Real                 (Brief="surface area per packing volume", Unit='m^2/m^3');
1786       
1787        V                               as volume                       (Brief="Total Volume of the tray",Protected=true);
1788        Pi                              as constant             (Brief="Pi Number",Default=3.14159265, Symbol = "\pi",Hidden=true);
1789        Gconst                  as acceleration         (Brief="Gravity Acceleration",Default=9.81,Hidden=true);
1790        HETP                    as length                       (Brief="the Height Equivalent to a Theoretical Plate",Protected=true);
1791        ColumnArea              as area                         (Brief="Column Sectional Cross Area",Protected=true);
1792       
1793        VapourFlow as Switcher(Valid = ["on", "off"], Default = "on",Hidden=true);
1794
1795
1796VARIABLES
1797
1798        INITIALIZATION  as InitializeStage      (Brief = "Column Model Initialization");
1799       
1800        in      LiquidInlet             as      stream                          (Brief="Liquid Inlet in the section", PosX=0.70, PosY=0);
1801        out     VapourOutlet            as vapour_stream        (Brief="Vapour Outlet in the section", PosX=0.30, PosY=0);
1802       
1803        in              VapourInlet             as stream                               (Brief="Vapour Inlet in the section", PosX=0.30, PosY=1);
1804        out     LiquidOutlet            as liquid_stream                (Brief="Liquid Outlet in the section", PosX=0.70, PosY=1);
1805       
1806        LiquidConnector as stream       (Brief="Liquid connection at the middle STAGES", PosX=0.75, PosY=1,Hidden=true);
1807        VapourConnector as stream       (Brief="Vapour connection at the middle STAGES", PosX=0.55, PosY=0,Hidden=true);
1808       
1809        STAGES(NumberOfStages) as packedStage;
1810        PressureDrop               as pressure (Brief="Column Pressure Drop", Protected=true);
1811       
1812SET
1813       
1814        ColumnArea = 0.25*Pi*ColumnDiameter^2;
1815        HETP =PackingHeight/NumberOfStages;     
1816        V = HETP * ColumnArea;
1817       
1818        low_pressure = 1E-4 * 'atm';
1819        low_flow = 1E-6 * 'kmol/h';
1820        zero_flow = 0 * 'kmol/h';
1821       
1822CONNECTIONS
1823
1824        STAGES([2:NumberOfStages]).OutletVapour         to STAGES([1:NumberOfStages-1]).InletVapour;
1825        STAGES([1:NumberOfStages-1]).OutletLiquid       to STAGES([2:NumberOfStages]).InletLiquid;
1826        LiquidConnector                                                         to STAGES(1).InletLiquid;
1827        VapourConnector                                                         to STAGES(NumberOfStages).InletVapour;
1828
1829EQUATIONS
1830
1831        LiquidConnector.F= LiquidInlet.F;
1832        LiquidConnector.T = LiquidInlet.T;
1833        LiquidConnector.P = LiquidInlet.P;
1834        LiquidConnector.z = LiquidInlet.z;
1835        LiquidConnector.v = LiquidInlet.v;
1836        LiquidConnector.h = LiquidInlet.h;
1837       
1838        VapourConnector.F= VapourInlet.F;
1839        VapourConnector.T = VapourInlet.T;
1840        VapourConnector.P = VapourInlet.P;
1841        VapourConnector.z = VapourInlet.z;
1842        VapourConnector.v = VapourInlet.v;
1843        VapourConnector.h = VapourInlet.h;
1844       
1845        LiquidOutlet.F= STAGES(NumberOfStages).OutletLiquid.F;
1846        LiquidOutlet.T = STAGES(NumberOfStages).OutletLiquid.T;
1847        LiquidOutlet.P = STAGES(NumberOfStages).OutletLiquid.P;
1848        LiquidOutlet.z = STAGES(NumberOfStages).OutletLiquid.z;
1849       
1850        VapourOutlet.F= STAGES(1).OutletVapour.F;
1851        VapourOutlet.T = STAGES(1).OutletVapour.T;
1852        VapourOutlet.P = STAGES(1).OutletVapour.P;
1853        VapourOutlet.z = STAGES(1).OutletVapour.z;
1854
1855"PressureDrop"
1856        PressureDrop = STAGES(NumberOfStages).OutletLiquid.P - STAGES(1).OutletLiquid.P;
1857
1858for i in [1:NumberOfStages] do
1859
1860switch VapourFlow
1861       
1862        case "on":
1863"Pressure drop and Vapor flow, Billet (4-58)"
1864        STAGES(i).deltaP/HETP  = ResistanceCoeff *( 0.5*AreaPerPackingVol + 2/ColumnDiameter) * 1/((VoidFraction-STAGES(i).hl)^3) * (STAGES(i).uV^2) * STAGES(i).rhoV;
1865       
1866        when STAGES(i).InletVapour.F < low_flow switchto "off";
1867       
1868        case "off":
1869"Vapour Flow"
1870        STAGES(i).InletVapour.F = zero_flow;
1871       
1872        when STAGES(i).deltaP > low_pressure switchto "on";
1873
1874end
1875
1876"Energy Balance"
1877        diff(STAGES(i).E) = (STAGES(i).Inlet.F*STAGES(i).Inlet.h + STAGES(i).InletLiquid.F*STAGES(i).InletLiquid.h + STAGES(i).InletVapour.F*STAGES(i).InletVapour.h- STAGES(i).OutletLiquid.F*STAGES(i).OutletLiquid.h
1878        - STAGES(i).OutletVapour.F*STAGES(i).OutletVapour.h + HeatSupply );
1879
1880"Energy Holdup"
1881        STAGES(i).E = STAGES(i).ML*STAGES(i).OutletLiquid.h + STAGES(i).MV*STAGES(i).OutletVapour.h - STAGES(i).OutletLiquid.P*V;
1882       
1883"Geometry Constraint"
1884        V*VoidFraction= STAGES(i).ML*STAGES(i).vL + STAGES(i).MV*STAGES(i).vV;
1885       
1886"Volume flow rate of vapor, m^3/m^2/s"
1887        STAGES(i).uV * (V*VoidFraction/HETP - STAGES(i).Al) = STAGES(i).InletVapour.F * STAGES(i).vV;
1888
1889"Liquid holdup"
1890        STAGES(i).hl*V*VoidFraction = STAGES(i).ML*STAGES(i).vL;
1891       
1892"Liquid velocity as a function of liquid holdup, Billet (4-27)"
1893        STAGES(i).hl^3 = (12/Gconst) * AreaPerPackingVol^2 * (STAGES(i).miL/STAGES(i).rhoL) * STAGES(i).uL;
1894        #STAGES(i).hl = (12*STAGES(i).miL*AreaPerPackingVol^2*STAGES(i).uL/STAGES(i).rhoL/Gconst)^1/3;
1895
1896"Area occupied by the liquid"
1897        STAGES(i).Al = STAGES(i).ML*STAGES(i).vL/HETP;
1898
1899end
1900
1901INITIAL
1902
1903for i in 1:NumberOfStages do
1904
1905"The initial temperature of the STAGES"
1906        STAGES(i).OutletLiquid.T = INITIALIZATION.TopStageTemperature+(INITIALIZATION.BottomStageTemperature-INITIALIZATION.TopStageTemperature)*((i-1)/(NumberOfStages-1));
1907
1908"The Column Holdup of the STAGES"
1909        STAGES(i).hl = INITIALIZATION.ColumnHoldup;
1910
1911end
1912
1913for i in 1:NComp-1 do
1914       
1915for j in 1:NumberOfStages do
1916
1917"The initial composition of the TRAYS"
1918        STAGES(j).OutletLiquid.z(i) = INITIALIZATION.TopStageComposition(i)/sum(INITIALIZATION.TopStageComposition) +(INITIALIZATION.BottomStageComposition(i)/sum(INITIALIZATION.BottomStageComposition)-INITIALIZATION.TopStageComposition(i)/sum(INITIALIZATION.TopStageComposition) )*((j-1)/(NumberOfStages-1));
1919
1920end
1921
1922end
1923
1924end
1925
1926Model Packed_Section_Column     as Packed_Section_ColumnBasic
1927
1928        ATTRIBUTES
1929        Pallete         = true;
1930        Icon            = "icon/PackedSectionColumn";
1931        Brief           = "Model of a packed column section.";
1932        Info            =
1933"== Model of a packed column section containing ==
1934* NStages theoretical stages.
1935       
1936== Specify ==
1937* the feed stream of each tray (Inlet);
1938* the InletLiquid stream of the top tray;
1939* the InletVapour stream of the bottom tray;
1940* the total pressure drop (dP) of the section.
1941       
1942== Initial Conditions ==
1943* the stages temperature (OutletLiquid.T);
1944* the stages liquid holdup;
1945* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
1946";
1947
1948SET
1949        NumberOfFeeds = 1;
1950
1951VARIABLES
1952       
1953        in      FeedStage       as stream               (Brief="Feed stream", PosX=0, PosY=0.55);
1954
1955EQUATIONS
1956#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1957# Equating Feed Tray Variables to Trays Variables
1958#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1959for i in 1:NumberOfStages do
1960
1961if   i equal FeedStageLocation(1) then   
1962
1963"FeedTrayTop Inlet Flow"       
1964        FeedStage.F= STAGES(i).Inlet.F;
1965
1966"FeedTrayTop Inlet Temperature"
1967        FeedStage.T = STAGES(i).Inlet.T;
1968
1969"FeedTrayTop Inlet Pressure"
1970        FeedStage.P = STAGES(i).Inlet.P;
1971
1972"FeedTrayTop Inlet Composition"
1973        FeedStage.z = STAGES(i).Inlet.z;
1974
1975"FeedTrayTop Inlet Vapour Fraction"
1976        FeedStage.v = STAGES(i).Inlet.v;
1977
1978"FeedTrayTop Inlet Enthalpy"
1979        FeedStage.h = STAGES(i).Inlet.h;
1980
1981else
1982
1983"Inlet Tray - Flow Sealed"
1984    0*'mol/h'= STAGES(i).Inlet.F;
1985       
1986"Inlet Tray -  Temperature"
1987    300*'K' = STAGES(i).Inlet.T;
1988       
1989"Inlet Tray -  Pressure"
1990    1*'atm' = STAGES(i).Inlet.P;
1991       
1992"Inlet Tray -  Composition"
1993    0.1 = STAGES(i).Inlet.z;
1994       
1995"Inlet Tray -  Vapour Fraction"
1996    0 = STAGES(i).Inlet.v;
1997       
1998"Inlet Tray -  Enthalpy"
1999    0*'J/mol' = STAGES(i).Inlet.h;
2000
2001end
2002
2003end
2004
2005end
2006
2007Model Packed_Section_Column2    as Packed_Section_ColumnBasic
2008
2009        ATTRIBUTES
2010        Pallete         = true;
2011        Icon            = "icon/PackedSectionColumn";
2012        Brief           = "Model of a packed column section.";
2013        Info            =
2014"== Model of a packed column section containing ==
2015* NStages theoretical stages.
2016       
2017== Specify ==
2018* the feed stream of each tray (Inlet);
2019* the InletLiquid stream of the top tray;
2020* the InletVapour stream of the bottom tray;
2021* the total pressure drop (dP) of the section.
2022       
2023== Initial Conditions ==
2024* the stages temperature (OutletLiquid.T);
2025* the stages liquid holdup;
2026* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
2027";
2028
2029SET
2030        NumberOfFeeds = 2;
2031
2032VARIABLES
2033       
2034        in      FeedStageOne    as stream               (Brief="Feed stream", PosX=0, PosY=0.45);
2035        in      FeedStageTwo    as stream               (Brief="Feed stream", PosX=0, PosY=0.65);
2036
2037EQUATIONS
2038#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2039# Equating Feed Stage Variables to Stages Variables
2040#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2041
2042for i in 1:NumberOfStages do
2043
2044if   i equal FeedStageLocation(1) then   
2045
2046"FeedTrayTop Inlet Flow"       
2047        FeedStageOne.F= STAGES(i).Inlet.F;
2048
2049"FeedTrayTop Inlet Temperature"
2050        FeedStageOne.T = STAGES(i).Inlet.T;
2051
2052"FeedTrayTop Inlet Pressure"
2053        FeedStageOne.P = STAGES(i).Inlet.P;
2054
2055"FeedTrayTop Inlet Composition"
2056        FeedStageOne.z = STAGES(i).Inlet.z;
2057
2058"FeedTrayTop Inlet Vapour Fraction"
2059        FeedStageOne.v = STAGES(i).Inlet.v;
2060
2061"FeedTrayTop Inlet Enthalpy"
2062        FeedStageOne.h = STAGES(i).Inlet.h;
2063
2064else if   i equal FeedStageLocation(2) then   
2065
2066"FeedTrayBottom Inlet Flow"     
2067        FeedStageTwo.F= STAGES(i).Inlet.F;
2068
2069"FeedTrayBottom Inlet Temperature"
2070        FeedStageTwo.T = STAGES(i).Inlet.T;
2071
2072"FeedTrayBottom Inlet Pressure"
2073        FeedStageTwo.P = STAGES(i).Inlet.P;
2074
2075"FeedTrayBottom Inlet Composition"
2076        FeedStageTwo.z = STAGES(i).Inlet.z;
2077
2078"FeedTrayBottom Inlet Vapour Fraction"
2079        FeedStageTwo.v = STAGES(i).Inlet.v;
2080
2081"FeedTrayBottom Inlet Enthalpy"
2082        FeedStageTwo.h = STAGES(i).Inlet.h;
2083
2084else
2085
2086"Inlet Tray - Flow Sealed"
2087    0*'mol/h'= STAGES(i).Inlet.F;
2088       
2089"Inlet Tray -  Temperature"
2090    300*'K' = STAGES(i).Inlet.T;
2091       
2092"Inlet Tray -  Pressure"
2093    1*'atm' = STAGES(i).Inlet.P;
2094       
2095"Inlet Tray -  Composition"
2096    0.1 = STAGES(i).Inlet.z;
2097       
2098"Inlet Tray -  Vapour Fraction"
2099    0 = STAGES(i).Inlet.v;
2100       
2101"Inlet Tray -  Enthalpy"
2102    0*'J/mol' = STAGES(i).Inlet.h;
2103
2104end
2105
2106end
2107
2108end
2109
2110end
2111
2112Model PackedDistillation_kettle_cond as Packed_Section_ColumnBasic
2113        ATTRIBUTES
2114        Pallete         = true;
2115        Icon            = "icon/PackedDistillationKettleCond";
2116        Brief           = "Model of a distillation column with dynamic condenser and dynamic reboiler.";
2117        Info            =
2118"== Specify ==
2119* the feed stream of each tray (Inlet);
2120* the pump pressure difference;
2121* the total pressure drop (dP) of the packing;
2122* the heat supllied in reboiler and condenser;
2123* the condenser vapor outlet flow (OutletVapour.F);
2124* the reboiler liquid outlet flow (OutletLiquid.F);
2125* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
2126       
2127== Initial Conditions ==
2128* the stages temperature (OutletLiquid.T);
2129* the stages initial molar holdup;
2130* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each stage;
2131       
2132* the condenser temperature (OutletLiquid.T);
2133* the condenser liquid level (Level);
2134* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
2135       
2136* the reboiler temperature (OutletLiquid.T);
2137* the reboiler liquid level (Level);
2138* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
2139";
2140       
2141PARAMETERS
2142
2143        #VapourFlow as Switcher (Valid = ["on", "off"], Hidden = true ,Default = "on");
2144       
2145VARIABLES
2146#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2147# Column Devices
2148#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2149        CONDENSER       as condenser    (Brief="dymamic condenser");
2150        REBOILER        as reboiler             (Brief="kettle reboiler");
2151        SPLITTER        as splitter2            (Brief="splitter which separate reflux and distillate");
2152        PUMP            as pump                 (Brief="pump in reflux stream");
2153#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2154# Heat Ports
2155#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2156        in      HeatToReboiler  as power (Brief="Heat supplied to Reboiler",Protected = true, PosX=1, PosY=0.885);
2157        in      HeatToCondenser as power (Brief="Heat supplied to Condenser", Protected = true, PosX=1, PosY=0.034);
2158#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2159# Column Products
2160#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2161        out     VapourDistillate        as vapour_stream        (Brief="Vapour outlet stream From Top Condenser", PosX=0.66, PosY=0);
2162        out     LiquidDistillate        as liquid_stream        (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.20);
2163        out     BottomProduct           as liquid_stream        (Brief="Liquid outlet stream From Reboiler", PosX=0.68, PosY=1);
2164#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2165# Column Connectors
2166#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++             
2167        in      ConnectorCondenserVout  as stream       (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true);
2168        in      ConnectorSplitterOut    as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
2169        in      ConnectorReboilerLout   as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
2170                ConnectorHeatReboiler   as power        (Brief="Heat supplied to Reboiler", Hidden=true);
2171                ConnectorHeatCondenser  as power        (Brief="Heat supplied to Condenser", Hidden=true);
2172
2173CONNECTIONS
2174
2175#vapor
2176        #REBOILER.OutletVapour          to STAGES(NumberOfStages).VapourConnector;
2177        STAGES(1).OutletVapour          to CONDENSER.InletVapour;
2178
2179#liquid
2180        CONDENSER.OutletLiquid                          to SPLITTER.Inlet;     
2181        SPLITTER.Outlet2                                to PUMP.Inlet;
2182        #PUMP.Outlet                                    to STAGES(1).InletLiquid;
2183        STAGES(NumberOfStages).OutletLiquid     to REBOILER.InletLiquid;
2184
2185#Connectors
2186ConnectorHeatReboiler   to REBOILER.InletQ;
2187ConnectorHeatCondenser  to CONDENSER.InletQ;
2188
2189CONDENSER.OutletVapour          to ConnectorCondenserVout;
2190SPLITTER.Outlet1                to ConnectorSplitterOut;
2191REBOILER.OutletLiquid           to ConnectorReboilerLout;
2192
2193EQUATIONS
2194        HeatToReboiler  = ConnectorHeatReboiler;
2195        HeatToCondenser = ConnectorHeatCondenser;
2196       
2197# Condenser Connector Equations
2198        ConnectorCondenserVout.T = VapourDistillate.T;
2199        ConnectorCondenserVout.P = VapourDistillate.P;
2200        ConnectorCondenserVout.F = VapourDistillate.F;
2201        ConnectorCondenserVout.z = VapourDistillate.z;
2202
2203# Splitter Connector Equations
2204        ConnectorSplitterOut.T = LiquidDistillate.T;
2205        ConnectorSplitterOut.P = LiquidDistillate.P;
2206        ConnectorSplitterOut.F = LiquidDistillate.F;
2207        ConnectorSplitterOut.z = LiquidDistillate.z;
2208
2209# Reboiler Connector Equations
2210        ConnectorReboilerLout.T = BottomProduct.T;
2211        ConnectorReboilerLout.P = BottomProduct.P;
2212        ConnectorReboilerLout.F = BottomProduct.F;
2213        ConnectorReboilerLout.z = BottomProduct.z;
2214
2215end
2216
2217#*
2218Model Rectifier_subcooling as Section_ColumnBasicX
2219
2220ATTRIBUTES
2221        Pallete         = true;
2222        Icon            = "icon/RefluxedSubcooling";
2223        Brief           = "Model of a rectifier column with steady condenser.";
2224        Info            =
2225"== Specify ==
2226* the feed stream of each tray (Inlet);
2227* the Murphree eficiency for each tray Emv;
2228* the InletVapour stream of the bottom tray unless its flow;
2229* the pump head;
2230* the condenser pressure drop;
2231* the heat supllied in  the top tank;
2232* the heat supllied in condenser;
2233* both  top splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
2234       
2235== Initial Conditions ==
2236* the TRAYS temperature (OutletLiquid.T);
2237* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
2238* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
2239       
2240* the top tank temperature (OutletLiquid.T);
2241* the top tank liquid level (Level);
2242* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
2243";
2244       
2245PARAMETERS
2246        CondenserVapourFlow             as Switcher     (Valid = ["on", "off"], Default = "on",Hidden=true);
2247
2248VARIABLES
2249#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2250# Column Vapour and Liquid Draw Sides
2251#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2252        out     VapourDrawOff   as vapour_stream        (Brief="Vapour Outlet in the section", PosX=1, PosY=0.485,Protected = true);
2253        out     LiquidDrawOff   as liquid_stream        (Brief="Liquid Outlet in the section", PosX=1, PosY=0.535,Protected = true);
2254#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2255# Column Devices
2256#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2257        CONDENSER               as condenserSteady      (Brief="steady state condenser with subcooling");
2258        ACCUMULATOR             as tank_cylindrical     (Brief="vessel drum (layed cilinder)");
2259        SPLITTER                as splitter2                    (Brief="plitter which separate reflux and distillate");
2260        PUMP                    as pump                         (Brief="pump in reflux stream");
2261        alfaTopo                as Real;
2262#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2263# Column Bottom outlets
2264#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2265        in      VapourInlet             as stream                       (Brief="Vapour Inlet in the section", PosX=0.07, PosY=1);
2266        out     LiquidOutlet    as liquid_stream        (Brief="Liquid Outlet in the section", PosX=0.32, PosY=1);
2267#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2268# Heat Ports
2269#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2270        in      HeatToCondenser         as power        (Brief="Heat supplied to Condenser", PosX=1, PosY=0.070, Protected=true);
2271        in      HeatToAccumulator       as power        (Brief="Heat supplied to Top Accumulator", PosX=1, PosY=0.23, Protected=true);
2272#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2273# Column Top Product
2274#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2275        out     LiquidDistillate                as liquid_stream        (Brief="Liquid outlet stream From Top Splitter", PosX=1, PosY=0.285);
2276#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2277# Column Connectors
2278#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2279in      ConnectorSplitterTop            as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
2280        VapourConnector                         as stream       (Brief="Vapour connection at the middle TRAYS", PosX=0.55, PosY=0,Hidden=true);
2281        ConnectorHeatCondenser          as power        (Brief="Connector for Heat supplied to Condenser", Hidden=true);
2282        ConnectorHeatAccumulator        as power        (Brief="Connector for Heat supplied to Top Accumulator", Hidden=true);
2283
2284EQUATIONS
2285#Heat Connectors
2286        HeatToCondenser         = ConnectorHeatCondenser;
2287        HeatToAccumulator       = ConnectorHeatAccumulator;
2288       
2289        LiquidOutlet.F= TRAYS(NumberOfTrays).OutletLiquid.F;
2290        LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T;
2291        LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P;
2292        LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z;
2293
2294        VapourConnector.F= VapourInlet.F;
2295        VapourConnector.T = VapourInlet.T;
2296        VapourConnector.P = VapourInlet.P;
2297        VapourConnector.z = VapourInlet.z;
2298        VapourConnector.v = VapourInlet.v;
2299        VapourConnector.h = VapourInlet.h;
2300       
2301# Splitter Connector Equations
2302        ConnectorSplitterTop.T = LiquidDistillate.T;
2303        ConnectorSplitterTop.P = LiquidDistillate.P;
2304        ConnectorSplitterTop.F = LiquidDistillate.F;
2305        ConnectorSplitterTop.z = LiquidDistillate.z;
2306
2307        VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F;
2308        VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T;
2309        VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P;
2310        VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z;
2311
2312        LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F;
2313        LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T;
2314        LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P;
2315        LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z;
2316
2317        VapourDrawOffFlow = VapourDrawOff.F;
2318        LiquidDrawOffFlow = LiquidDrawOff.F;
2319       
2320switch CondenserVapourFlow
2321
2322        case "on":
2323                CONDENSER.InletVapour.F*TRAYS(1).vV = alfaTopo *Ah * sqrt(2*(TRAYS(1).OutletVapour.P -
2324                CONDENSER.OutletLiquid.P + 1e-8 * 'atm') / (alfa*TRAYS(1).rhoV));
2325        when CONDENSER.InletVapour.F < 1e-6 * 'kmol/h' switchto "off";
2326               
2327        case "off":
2328                CONDENSER.InletVapour.F = 0 * 'mol/s';
2329        when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-1 * 'atm' switchto "on";
2330
2331end     
2332
2333CONNECTIONS
2334#vapor
2335        TRAYS(1).OutletVapour to CONDENSER.InletVapour;
2336
2337#liquid
2338        CONDENSER.OutletLiquid          to ACCUMULATOR.Inlet;   
2339        ACCUMULATOR.Outlet                                      to SPLITTER.Inlet;
2340        SPLITTER.Outlet2                to PUMP.Inlet; 
2341        PUMP.Outlet                                             to TRAYS(1).InletLiquid;
2342
2343#Connectors
2344        VapourConnector                         to TRAYS(NumberOfTrays).InletVapour;
2345        ConnectorHeatCondenser                  to CONDENSER.InletQ;
2346        SPLITTER.Outlet1        to ConnectorSplitterTop;
2347        ConnectorHeatAccumulator                        to ACCUMULATOR.InletQ;
2348
2349end
2350
2351Model Reboiled_Stripping_kettle as Section_ColumnBasicX
2352       
2353ATTRIBUTES
2354        Pallete         = true;
2355        Icon            = "icon/ReboiledKettle";
2356        Brief           = "Model of a reboiled stripping column with dynamic reboiler.";
2357        Info            =
2358"== Specify ==
2359* the feed stream of each tray (Inlet);
2360* the Murphree eficiency for each tray Emv;
2361* the vapour flow leaving the top of the column;
2362* the InletLiquidiquid stream of the top tray;
2363* the heat supllied in the reboiler;
2364* the reboiler liquid outlet flow (OutletLiquid.F);
2365       
2366== Initial Conditions ==
2367* the TRAYS temperature (OutletLiquid.T);
2368* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
2369* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
2370       
2371* the reboiler temperature (OutletLiquid.T);
2372* the reboiler liquid level (Level);
2373* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
2374";
2375
2376VARIABLES
2377#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2378# Column Vapour and Liquid Draw Sides
2379#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2380        out     VapourDrawOff   as vapour_stream        (Brief="Vapour Outlet in the section", PosX=1, PosY=0.28,Protected = true);
2381        out     LiquidDrawOff   as liquid_stream        (Brief="Liquid Outlet in the section", PosX=1, PosY=0.33,Protected = true);
2382#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2383# Column Devices
2384#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 
2385        REBOILER as reboiler (Brief="Kettle Reboiler");
2386#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2387# Heat Port
2388#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2389        in      HeatToReboiler  as power        (Brief="Heat supplied to Reboiler",PosX=1, PosY=0.865,Protected=true);
2390#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2391# Column Top Outlets
2392#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++             
2393        in      LiquidInlet             as      stream                  (Brief="Liquid Inlet in the section", PosX=0.30, PosY=0);
2394        out     VapourOutlet    as vapour_stream        (Brief="Vapour Outlet in the section", PosX=0.07, PosY=0);
2395#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2396# Column Bottom Product
2397#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2398        out     BottomProduct   as liquid_stream        (Brief="Liquid outlet stream From Reboiler", PosX=0.68, PosY=1);
2399#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2400# Column Connectors
2401#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2402        in      ConnectorReboilerLout   as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
2403                LiquidConnector                 as stream       (Brief="Liquid connection at the middle TRAYS", PosX=0.75, PosY=1,Hidden=true);
2404                ConnectorHeatReboiler   as power        (Brief="Connector for Heat supplied to Reboiler", Hidden=true);
2405
2406CONNECTIONS
2407#vapor
2408        REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour;
2409       
2410#liquid
2411        TRAYS(NumberOfTrays).OutletLiquid to REBOILER.InletLiquid;
2412
2413#Connectors
2414REBOILER.OutletLiquid           to ConnectorReboilerLout;
2415LiquidConnector                 to TRAYS(1).InletLiquid;
2416ConnectorHeatReboiler   to REBOILER.InletQ;
2417
2418EQUATIONS
2419#Heat Connectors
2420        HeatToReboiler = ConnectorHeatReboiler;
2421       
2422        LiquidConnector.F= LiquidInlet.F;
2423        LiquidConnector.T = LiquidInlet.T;
2424        LiquidConnector.P = LiquidInlet.P;
2425        LiquidConnector.z = LiquidInlet.z;
2426        LiquidConnector.v = LiquidInlet.v;
2427        LiquidConnector.h = LiquidInlet.h;
2428       
2429        VapourOutlet.F= TRAYS(1).OutletVapour.F;
2430        VapourOutlet.T = TRAYS(1).OutletVapour.T;
2431        VapourOutlet.P = TRAYS(1).OutletVapour.P;
2432        VapourOutlet.z = TRAYS(1).OutletVapour.z;
2433       
2434# Reboiler Connector Equations
2435        ConnectorReboilerLout.T = BottomProduct.T;
2436        ConnectorReboilerLout.P = BottomProduct.P;
2437        ConnectorReboilerLout.F = BottomProduct.F;
2438        ConnectorReboilerLout.z = BottomProduct.z;
2439       
2440        VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F;
2441        VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T;
2442        VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P;
2443        VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z;
2444
2445        LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F;
2446        LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T;
2447        LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P;
2448        LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z;
2449
2450        VapourDrawOffFlow = VapourDrawOff.F;
2451        LiquidDrawOffFlow = LiquidDrawOff.F;
2452
2453end
2454
2455Model Reboiled_Stripping_thermosyphon as Section_ColumnBasicX
2456
2457ATTRIBUTES
2458        Pallete         = true;
2459        Icon            = "icon/ReboiledThermosyphon";
2460        Brief           = "Model of a reboiled stripping column with steady reboiler.";
2461        Info            =
2462"== Specify ==
2463* the feed stream of each tray (Inlet);
2464* the Murphree eficiency for each tray (Emv);
2465* the vapour flow leaving the top of the column;
2466* the InletLiquidiquid stream of the top tray;
2467* the heat supllied in bottom tank;
2468* the heat supllied in the reboiler;
2469* the Outlet1 flow in the bottom splitter (spbottom.Outlet1.F) that corresponds to the bottom product;
2470       
2471== Initial Conditions ==
2472* the TRAYS temperature (OutletLiquid.T);
2473* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
2474* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
2475
2476* the bottom tank temperature (OutletLiquid.T);
2477* the bottom tank liquid level (Level);
2478* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
2479";
2480
2481VARIABLES
2482#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2483# Column Vapour and Liquid Draw Sides
2484#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2485        out     VapourDrawOff   as vapour_stream        (Brief="Vapour Outlet in the section", PosX=1, PosY=0.28,Protected = true);
2486        out     LiquidDrawOff   as liquid_stream        (Brief="Liquid Outlet in the section", PosX=1, PosY=0.33,Protected = true);
2487#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2488# Column Devices
2489#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2490        REBOILER                as reboilerSteady       (Brief="steady state reboiler (thermosyphon)");
2491        SPLITTER                as splitter2            (Brief="splitter which separate the bottom product and the stream to reboiler");
2492        ACCUMULATOR     as tank                         (Brief="vessel in the bottom of column");
2493#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2494# Heat Ports
2495#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2496        in      HeatToReboiler          as power        (Brief="Heat supplied to Reboiler",PosX=1, PosY=0.84,Protected=true);
2497        in      HeatToAccumulator       as power        (Brief="Heat supplied to Bottom Vessel",PosX=0, PosY=0.91,Protected=true);
2498#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2499# Column Top Outlets
2500#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2501        in      LiquidInlet             as      stream                  (Brief="Liquid Inlet in the section", PosX=0.32, PosY=0);
2502        out     VapourOutlet    as vapour_stream        (Brief="Vapour Outlet in the section", PosX=0.07, PosY=0);
2503#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2504# Column Bottom Product
2505#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2506        out     BottomProduct   as liquid_stream        (Brief="Liquid outlet stream From Reboiler", PosX=0.19, PosY=1);
2507        LiquidConnector         as stream                       (Brief="Liquid connection at the middle TRAYS", PosX=0.75, PosY=1,Hidden=true);
2508#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2509# Column Connectors
2510#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2511        in      ConnectorSplitterBottom         as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
2512        ConnectorHeatReboiler                   as power        (Brief="Connector for Heat supplied to Reboiler", Hidden=true);
2513        ConnectorHeatAccumulator                as power        (Brief="Connector for Heat supplied to Bottom Accumulator", Hidden=true);
2514
2515CONNECTIONS
2516#vapor
2517        REBOILER.OutletVapour to TRAYS(NumberOfTrays).InletVapour;
2518       
2519#liquid
2520        TRAYS(NumberOfTrays).OutletLiquid       to ACCUMULATOR.Inlet;
2521        ACCUMULATOR.Outlet                              to SPLITTER.Inlet;
2522        SPLITTER.Outlet2                                to REBOILER.InletLiquid;
2523
2524#Connectors
2525LiquidConnector                         to TRAYS(1).InletLiquid;
2526ConnectorHeatReboiler           to REBOILER.InletQ;
2527ConnectorHeatAccumulator        to ACCUMULATOR.InletQ;
2528SPLITTER.Outlet1                        to ConnectorSplitterBottom;
2529
2530EQUATIONS
2531#Heat Connectors
2532        HeatToReboiler  = ConnectorHeatReboiler;
2533        HeatToAccumulator       = ConnectorHeatAccumulator;
2534       
2535        ConnectorSplitterBottom.T = BottomProduct.T;
2536        ConnectorSplitterBottom.P = BottomProduct.P;
2537        ConnectorSplitterBottom.F = BottomProduct.F;
2538        ConnectorSplitterBottom.z = BottomProduct.z;
2539       
2540        LiquidConnector.F= LiquidInlet.F;
2541        LiquidConnector.T = LiquidInlet.T;
2542        LiquidConnector.P = LiquidInlet.P;
2543        LiquidConnector.z = LiquidInlet.z;
2544        LiquidConnector.v = LiquidInlet.v;
2545        LiquidConnector.h = LiquidInlet.h;
2546       
2547        VapourOutlet.F= TRAYS(1).OutletVapour.F;
2548        VapourOutlet.T = TRAYS(1).OutletVapour.T;
2549        VapourOutlet.P = TRAYS(1).OutletVapour.P;
2550        VapourOutlet.z = TRAYS(1).OutletVapour.z;
2551       
2552        VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F;
2553        VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T;
2554        VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P;
2555        VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z;
2556
2557        LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F;
2558        LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T;
2559        LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P;
2560        LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z;
2561
2562        VapourDrawOffFlow = VapourDrawOff.F;
2563        LiquidDrawOffFlow = LiquidDrawOff.F;
2564
2565end
2566
2567Model ReactiveDistillation
2568       
2569ATTRIBUTES
2570        Pallete         = true;
2571        Icon            = "icon/DistillationReac";
2572        Brief           = "Model of a reactive distillation column with dynamic condenser and reboiler.";
2573        Info            =
2574"== Specify ==
2575* the reaction related variables for each tray, condenser and reboiler;
2576* the feed stream of each tray (Inlet);
2577* the Murphree eficiency for each tray Emv;
2578* the pump pressure difference;
2579* the heat supllied in reboiler and condenser;
2580* the condenser vapor outlet flow (OutletVapour.F);
2581* the reboiler liquid outlet flow (OutletLiquid.F);
2582* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
2583       
2584== Initial Conditions ==
2585* the TRAYS temperature (OutletLiquid.T);
2586* the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F);
2587* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
2588       
2589* the condenser temperature (OutletLiquid.T);
2590* the condenser liquid level (Level);
2591* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
2592       
2593* the reboiler temperature (OutletLiquid.T);
2594* the reboiler liquid level (Level);
2595* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
2596";
2597       
2598PARAMETERS
2599        outer PP        as Plugin       (Type="PP");
2600        outer NComp as Integer  (Brief="Number of Components");
2601#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2602# Section Column Feed Tray - Side Streams  Location and Numbering
2603#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2604        NumberOfTrays                                           as Integer      (Brief="Number of TRAYS", Default=2);
2605        FeedTrayIndex(NumberOfTrays)            as Integer      (Brief="Feed Tray Index", Default=0,Hidden=true);
2606        LiqSideTrayIndex(NumberOfTrays)         as Integer      (Brief="Liquid Side Tray Index", Default=0,Hidden=true);
2607        VapSideTrayIndex(NumberOfTrays)         as Integer      (Brief="Vapour Side Tray Index", Default=0,Hidden=true);
2608        FeedTrayLocation                                        as Integer      (Brief="Feed tray Location", Default=2);
2609        LiquidSideStreamLocation                        as Integer      (Brief="Liquid Side Stream Location", Default=2);
2610        VapourSideStreamLocation                        as Integer      (Brief="Vapour Side Stream Location", Default=2);
2611#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2612# Section Column Flow Model for Liquid and Vapour
2613#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2614        VapourFlow              as Switcher     (Valid = ["on", "off"], Default = "off",Hidden=true);
2615        TrayVapourFlow  as Switcher     (Valid = ["on", "off"], Default = "off",Hidden=true);
2616        TrayLiquidFlow  as Switcher     (Valid = ["on", "off"], Default = "off",Hidden=true);
2617        alfacond                as Real;
2618#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2619# Section Column Tray Geometry and Auxiliar Parameters
2620#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2621        V               as volume               (Brief="Total Volume of the tray",Hidden=true);
2622        Q               as power                (Brief="Rate of heat supply",Hidden=true);
2623        Ap              as area                 (Brief="Plate area = Atray - Adowncomer",Hidden=true);
2624        Ah              as area                 (Brief="Total holes area",Hidden=true);
2625        lw              as length               (Brief="Weir length",Hidden=true);
2626        g               as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true);
2627        hw              as length               (Brief="Weir height",Hidden=true);
2628        beta    as fraction     (Brief="Aeration fraction");
2629        alfa    as fraction     (Brief="Dry pressure drop coefficient");
2630
2631        VolumeOfTray            as volume               (Brief="Total Volume of the tray");
2632        HeatSupply                      as heat_rate    (Brief="Rate of heat supply");
2633        PlateArea                       as area                 (Brief="Plate area = Atray - Adowncomer");
2634        HolesArea                       as area                 (Brief="Total holes area");
2635        WeirLength                      as length               (Brief="Weir length");
2636        WeirHeight                      as length               (Brief="Weir height");
2637
2638        stoic(NComp)    as Real(Brief="Stoichiometric matrix");
2639        Hr                                              as energy_mol;
2640       
2641SET
2642
2643        FeedTrayIndex(FeedTrayLocation)         =1;
2644        VapSideTrayIndex(FeedTrayLocation)      =1;
2645        LiqSideTrayIndex(FeedTrayLocation)      =1;
2646
2647        V=VolumeOfTray;
2648        Q=HeatSupply;
2649        Ap=PlateArea;
2650        Ah=HolesArea;
2651        lw=WeirLength;
2652        hw=WeirHeight ;
2653       
2654VARIABLES
2655#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2656# Tray Initialization For the Whole Column Section
2657#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2658        INITIALIZATION          as InitializeSection    (Brief = "Column Model Initialization");
2659#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2660# Column Feed - Side Stream Flow and Murphree Efficiency
2661#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++     
2662        in      FeedTray                        as stream       (Brief="Feed stream", PosX=0, PosY=0.55);
2663                VapourDrawOffFlow       as flow_mol (Brief = "Stream Molar Flow Rate");
2664                LiquidDrawOffFlow   as flow_mol (Brief = "Stream Molar Flow Rate");
2665                MurphreeEff             as Real         (Brief = "Murphree efficiency");
2666#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2667# Column Vapour and Liquid Draw Sides
2668#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2669        out     VapourDrawOff   as vapour_stream        (Brief="Vapour Outlet in the section", PosX=1, PosY=0.395,Protected = true);
2670        out     LiquidDrawOff   as liquid_stream        (Brief="Liquid Outlet in the section", PosX=1, PosY=0.44,Protected = true);
2671#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2672# Heat Ports
2673#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2674        in      HeatToReboiler  as power (Brief="Heat supplied to Reboiler", PosX=1, PosY=0.89);
2675        in      HeatToCondenser as power (Brief="Heat supplied to Condenser", PosX=1, PosY=0.07);
2676#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2677# Column Devices
2678#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2679        TRAYS(NumberOfTrays)    as trayReac;
2680        CONDENSER                               as condenserReact;
2681        REBOILER                                as reboilerReact;
2682        SPLITTER                                as splitter2;
2683        PUMP                                    as pump;
2684#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2685# Column Outlets
2686#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2687        out     VapourDistillate        as vapour_stream        (Brief="Vapour outlet stream From Condenser", PosX=0.59, PosY=0);
2688        out     LiquidDistillate        as liquid_stream        (Brief="Liquid outlet stream From Splitter", PosX=1, PosY=0.23);
2689        out     BottomProduct           as liquid_stream        (Brief="Liquid outlet stream From Reboiler", PosX=0.67, PosY=1);
2690#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2691# Column Connectors
2692#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2693in      ConnectorCondenserVout  as stream       (Brief="Connector for Vapour outlet stream From Top Condenser", Hidden=true);
2694in      ConnectorSplitterOut    as stream       (Brief="Connector for Liquid outlet stream From Top Splitter", Hidden=true);
2695in      ConnectorReboilerLout   as stream       (Brief="Connector for Liquid outlet stream From Reboiler", Hidden=true);
2696#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2697# Column Control Ports
2698#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2699        out     TRI as control_signal   (Brief="Temperature of Reboiler Indicator", PosX=1, PosY=0.83);
2700        out     LRI as control_signal   (Brief="Level of Reboiler Indicator", PosX=1, PosY=0.855);
2701        out     TCI as control_signal   (Brief="Temperature of Condenser Indicator", PosX=1, PosY=0.01);
2702        out     LCI as control_signal   (Brief="Level of Condenser Indicator", PosX=1, PosY=0.04);
2703
2704CONNECTIONS
2705#vapor
2706        REBOILER.OutletVapour                                   to TRAYS(NumberOfTrays).InletVapour;
2707        TRAYS(1).OutletVapour                                   to CONDENSER.InletVapour;
2708        TRAYS([2:NumberOfTrays]).OutletVapour   to TRAYS([1:NumberOfTrays-1]).InletVapour;
2709
2710#liquid
2711        CONDENSER.OutletLiquid                                  to SPLITTER.Inlet;     
2712        SPLITTER.Outlet2                                        to PUMP.Inlet;
2713        PUMP.Outlet                                             to TRAYS(1).InletLiquid;
2714        TRAYS([1:NumberOfTrays-1]).OutletLiquid         to TRAYS([2:NumberOfTrays]).InletLiquid;
2715        TRAYS(NumberOfTrays).OutletLiquid               to REBOILER.InletLiquid;
2716
2717#Connectors
2718        CONDENSER.OutletVapour  to ConnectorCondenserVout;
2719        SPLITTER.Outlet1        to ConnectorSplitterOut;
2720        REBOILER.OutletLiquid   to ConnectorReboilerLout;
2721
2722INITIAL
2723#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2724# Tray Initialization
2725#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2726for i in 1:NumberOfTrays do
2727
2728"The initial temperature of the TRAYS"
2729        TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1));
2730
2731"The initial Level of the TRAYS"
2732        TRAYS(i).Level = INITIALIZATION.LevelFraction*hw;
2733end
2734
2735for i in 1:NComp-1 do
2736
2737for j in 1:NumberOfTrays do
2738
2739"The initial composition of the TRAYS - Normalized"
2740        TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1));
2741end
2742
2743end
2744
2745EQUATIONS
2746
2747for i in [1:NumberOfTrays] do
2748
2749"Murphree Efficiency"
2750        TRAYS(i).OutletVapour.z =  MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z;
2751       
2752"Energy Holdup"
2753        TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*V;
2754
2755"Component Molar Balance"
2756        diff(TRAYS(i).M)=TRAYS(i).Inlet.F*TRAYS(i).Inlet.z + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.z + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.z- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.z - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.z-
2757        TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.z-TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.z + stoic*TRAYS(i).r3*TRAYS(i).ML*TRAYS(i).vL;
2758       
2759"Energy Balance"
2760        diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h
2761        -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + Q ) + Hr * TRAYS(i).r3 *TRAYS(i). vL*TRAYS(i).ML;
2762
2763"Level of clear liquid over the weir"
2764        TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/Ap;
2765
2766"Geometry Constraint"
2767        V = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV;
2768
2769end
2770
2771switch VapourFlow
2772                case "on":
2773                "Pressure Drop through the condenser"
2774                CONDENSER.InletVapour.F*TRAYS(1).vV / 'm^2' =
2775                        sqrt((TRAYS(1).OutletVapour.P - CONDENSER.OutletLiquid.P + 1e-8 * 'atm')/(TRAYS(1).rhoV*alfacond));
2776                when TRAYS(1).OutletVapour.P < CONDENSER.OutletLiquid.P switchto "off";
2777               
2778                case "off":
2779                "Prato selado"
2780                CONDENSER.InletVapour.F = 0.0 * 'mol/s';
2781                when TRAYS(1).OutletVapour.P > CONDENSER.OutletLiquid.P + 1e-3 * 'atm' switchto "on";
2782        end
2783
2784for i in [1:NumberOfTrays] do
2785
2786        switch TrayLiquidFlow
2787                case "on":
2788                "Francis Equation"
2789                TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*lw*((TRAYS(i).Level-(beta*hw)+1e-6*'m')/(beta))^2;
2790                when TRAYS(i).Level < (beta * hw) switchto "off";
2791               
2792                case "off":
2793                "Low level"
2794                TRAYS(i).OutletLiquid.F = 0 * 'mol/h';
2795                when TRAYS(i).Level > (beta * hw) + 1e-6*'m' switchto "on";
2796        end
2797
2798        switch TrayVapourFlow
2799                case "on":
2800                TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P - TRAYS(i).Level*g*TRAYS(i).rhoL + 1e-8 * 'atm')/(TRAYS(i).rhoV*alfa))*Ah;
2801                when TRAYS(i).InletVapour.P < TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL switchto "off";
2802               
2803                case "off":
2804                TRAYS(i).InletVapour.F = 0 * 'mol/s';
2805                when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL + 3e-2 * 'atm' switchto "on";
2806        end
2807
2808end
2809
2810# Connecting Trays
2811        FeedTray.F*FeedTrayIndex= TRAYS.Inlet.F;
2812        FeedTray.T = TRAYS.Inlet.T;
2813        FeedTray.P = TRAYS.Inlet.P;
2814        FeedTray.z = TRAYS.Inlet.z;
2815        FeedTray.v = TRAYS.Inlet.v;
2816        FeedTray.h = TRAYS.Inlet.h;
2817
2818        HeatToReboiler  = REBOILER.InletQ;
2819        HeatToCondenser = CONDENSER.InletQ;
2820
2821"Reboiler Temperature indicator"
2822        TRI * 'K' = REBOILER.OutletLiquid.T;
2823
2824"Reboiler Level indicator"
2825        LRI*REBOILER.V = REBOILER.Level*REBOILER.Across;
2826
2827"Condenser Temperature indicator"
2828        TCI * 'K' = CONDENSER.OutletLiquid.T;
2829
2830"Condenser Level indicator"
2831        LCI*CONDENSER.V = CONDENSER.Level*CONDENSER.Across;
2832
2833# Condenser Connector Equations
2834        ConnectorCondenserVout.T = VapourDistillate.T;
2835        ConnectorCondenserVout.P = VapourDistillate.P;
2836        ConnectorCondenserVout.F = VapourDistillate.F;
2837        ConnectorCondenserVout.z = VapourDistillate.z;
2838
2839# Splitter Connector Equations
2840        ConnectorSplitterOut.T = LiquidDistillate.T;
2841        ConnectorSplitterOut.P = LiquidDistillate.P;
2842        ConnectorSplitterOut.F = LiquidDistillate.F;
2843        ConnectorSplitterOut.z = LiquidDistillate.z;
2844
2845# Reboiler Connector Equations
2846        ConnectorReboilerLout.T = BottomProduct.T;
2847        ConnectorReboilerLout.P = BottomProduct.P;
2848        ConnectorReboilerLout.F = BottomProduct.F;
2849        ConnectorReboilerLout.z = BottomProduct.z;
2850
2851        VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F;
2852        VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T;
2853        VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P;
2854        VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z;
2855
2856        LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F;
2857        LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T;
2858        LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P;
2859        LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z;
2860
2861        VapourDrawOffFlow = VapourDrawOff.F;
2862        LiquidDrawOffFlow = LiquidDrawOff.F;
2863
2864end
2865
2866*#
Note: See TracBrowser for help on using the repository browser.