source: trunk/eml/stage_separators/column_Eff.mso

Last change on this file was 1002, checked in by Argimiro Resende Secchi, 6 years ago

Fixed sintax of tray efficiency model.
File size: 11.3 KB
Line 
1#*-------------------------------------------------------------------
2* Models of Column Section with Tray Efficiency Prediction
3* Author: Josias J. Junges
4*-------------------------------------------------------------------*#
5
6using "tray_Eff";
7using "reboiler";
8using "condenser";
9using "mixers_splitters/splitter";
10using "pressure_changers/pump";
11
12Model Section_Column_EffEmp
13        ATTRIBUTES
14        Pallete         = true;
15        Icon            = "icon/SectionColumn";
16        Brief           = "Model of a column section - Tray Efficiency Prediction";
17        Info            =
18"== Model of a column section containing ==
19* NTrays trays.
20       
21== Specify ==
22* the feed stream of each tray (Inlet);
23
24* the InletLiquid stream of the top tray;
25* the InletVapour stream of the bottom tray.
26       
27== Initial Conditions ==
28* the trays temperature (OutletLiquid.T);
29* the trays liquid level (Level) OR the trays liquid flow (OutletLiquid.F);
30* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
31";
32       
33        PARAMETERS
34        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
35        outer NComp as Integer;
36        NTrays as Integer(Brief="Number of trays", Default=2);
37        topdown as Integer(Brief="Trays counting (1=top-down, -1=bottom-up)", Default=1);
38        top as Integer(Brief="Number of top tray");
39        bot as Integer(Brief="Number of bottom tray");
40        xas as Integer(Brief="Adjacent above stage vapour composition");
41
42        SET
43        top = (NTrays-1)*(1-topdown)/2+1;
44        bot = NTrays/top;
45       
46        VARIABLES
47        trays(NTrays) as trayEffEmp;
48
49        CONNECTIONS
50        trays([top+topdown:topdown:bot]).OutletVapour to trays([top:topdown:bot-topdown]).InletVapour;
51        trays([top:topdown:bot-topdown]).OutletLiquid to trays([top+topdown:topdown:bot]).InletLiquid;
52       
53        EQUATIONS
54       
55        if NComp > 2 then
56       
57                (trays(top).LoutLk-trays(top).LinLK)*trays(top).m=(trays(top).VoutLk-xas);
58       
59                for i in [(top+1):NTrays] do
60                (trays(i).LoutLk-trays(i).LinLK)*trays(i).m=(trays(i).VoutLk-trays(i-1).VoutLk);
61                end
62       
63        else
64       
65                (trays(top).OutletLiquid.z(1)-trays(top).InletLiquid.z(1))*trays(top).m=(trays(top).OutletVapour.z(1)-xas);
66       
67                for i in [(top+1):NTrays] do
68                (trays(i).OutletLiquid.z(1)-trays(i).InletLiquid.z(1))*trays(i).m=(trays(i).OutletVapour.z(1)-trays(i-1).OutletVapour.z(1));
69                end
70        end
71       
72end
73
74Model Section_Column_EffFund
75        ATTRIBUTES
76        Pallete         = true;
77        Icon            = "icon/SectionColumn";
78        Brief           = "Model of a column section - Tray Efficiency Prediction";
79        Info            =
80"== Model of a column section containing ==
81* NTrays trays.
82       
83== Specify ==
84* the feed stream of each tray (Inlet);
85
86* the InletLiquid stream of the top tray;
87* the InletVapour stream of the bottom tray.
88       
89== Initial Conditions ==
90* the trays temperature (OutletLiquid.T);
91* the trays liquid level (Level) OR the trays liquid flow (OutletLiquid.F);
92* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray.
93";
94       
95        PARAMETERS
96        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
97        outer NComp as Integer;
98        NTrays as Integer(Brief="Number of trays", Default=2);
99        topdown as Integer(Brief="Trays counting (1=top-down, -1=bottom-up)", Default=1);
100        top as Integer(Brief="Number of top tray");
101        bot as Integer(Brief="Number of bottom tray");
102        xas as Real(Brief="Adjacent above stage vapour composition");
103
104        SET
105        top = (NTrays-1)*(1-topdown)/2+1;
106        bot = NTrays/top;
107       
108        VARIABLES
109        trays(NTrays) as trayEffFund;
110
111        CONNECTIONS
112        trays([top+topdown:topdown:bot]).OutletVapour to trays([top:topdown:bot-topdown]).InletVapour;
113        trays([top:topdown:bot-topdown]).OutletLiquid to trays([top+topdown:topdown:bot]).InletLiquid;
114       
115        EQUATIONS
116       
117        if NComp > 2 then
118       
119                (trays(top).LoutLk-trays(top).LinLK)*trays(top).m=(trays(top).VoutLk-xas);
120       
121                for i in [(top+1):NTrays] do
122                (trays(i).LoutLk-trays(i).LinLK)*trays(i).m=(trays(i).VoutLk-trays(i-1).VoutLk);
123                end
124       
125        else
126       
127                (trays(top).OutletLiquid.z(1)-trays(top).InletLiquid.z(1))*trays(top).m=(trays(top).OutletVapour.z(1)-xas);
128       
129                for i in [(top+1):NTrays] do
130                (trays(i).OutletLiquid.z(1)-trays(i).InletLiquid.z(1))*trays(i).m=(trays(i).OutletVapour.z(1)-trays(i-1).OutletVapour.z(1));
131                end
132        end
133end
134
135#*----------------------------------------------------------------------
136* Models of Column with Tray Efficiency Prediction
137* Author: Josias J. Junges
138*---------------------------------------------------------------------*#
139Model Distillation_kettle_cond_EffEmp
140        ATTRIBUTES
141        Pallete         = true;
142        Icon            = "icon/DistillationKettleCond";
143        Brief           = "Model of a distillation column with dynamic condenser and dynamic reboiler-Tray Efficiency Prediction";
144        Info            =
145"== Specify ==
146* the feed stream of each tray (Inlet);
147
148* the pump pressure difference;
149* the heat supllied in reboiler and condenser;
150* the condenser vapor outlet flow (OutletVapour.F);
151* the reboiler liquid outlet flow (OutletLiquid.F);
152* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
153       
154== Initial Conditions ==
155* the trays temperature (OutletLiquid.T);
156* the trays liquid level (Level) OR the trays liquid flow (OutletLiquid.F);
157* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
158       
159* the condenser temperature (OutletLiquid.T);
160* the condenser liquid level (Level);
161* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
162       
163* the reboiler temperature (OutletLiquid.T);
164* the reboiler liquid level (Level);
165* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
166";
167       
168        PARAMETERS
169        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
170        outer NComp as Integer;
171        NTrays as Integer(Brief="Number of trays", Default=2);
172        topdown as Integer(Brief="Trays counting (1=top-down, -1=bottom-up)", Default=1);
173        top as Integer(Brief="Number of top tray");
174        bot as Integer(Brief="Number of bottom tray");
175        VapourFlow as Switcher(Valid = ["on", "off"], Default = "on");
176        outer iLK as Integer (Brief="Pseudo-binary ligth key index");
177        outer iHK as Integer (Brief="Pseudo-binary heavy key index");   
178       
179        SET
180        top = (NTrays-1)*(1-topdown)/2+1;
181        bot = NTrays/top;
182       
183        VARIABLES
184        trays(NTrays) as trayEffEmp;
185        cond as condenser;
186        reb as reboiler;
187        sptop as splitter_column;
188        pump1 as pump;
189        alfaTopo as Real;
190        condVoutLk as positive (Brief="Pseudo-binary approach");
191       
192        EQUATIONS
193        switch VapourFlow
194                case "on":
195                cond.InletVapour.F*trays(top).vV = alfaTopo * trays(top).HolesArea_ * sqrt(2*(trays(top).OutletVapour.P -
196                cond.OutletLiquid.P + 1e-8 * 'atm') / (trays(top).DryPdropCoeff_*trays(top).rhoV));
197                when cond.InletVapour.F < 1e-6 * 'kmol/h' switchto "off";
198               
199                case "off":
200                cond.InletVapour.F = 0 * 'mol/s';
201                when trays(top).OutletVapour.P > cond.OutletLiquid.P + 1e-1 * 'atm' switchto "on";
202        end     
203       
204        "Condenser pseudo-binary approach"
205        condVoutLk=cond.OutletVapour.z(iLK)/(cond.OutletVapour.z(iLK)+cond.OutletVapour.z(iHK));
206       
207        CONNECTIONS
208        #vapor
209        reb.OutletVapour to trays(bot).InletVapour;
210        trays([top+topdown:topdown:bot]).OutletVapour to trays([top:topdown:bot-topdown]).InletVapour;
211        trays(top).OutletVapour to cond.InletVapour;
212       
213        #liquid
214        cond.OutletLiquid to sptop.Inlet;       
215        sptop.Outlet2 to pump1.Inlet;
216        pump1.Outlet to trays(top).InletLiquid;
217        trays([top:topdown:bot-topdown]).OutletLiquid to trays([top+topdown:topdown:bot]).InletLiquid;
218        trays(bot).OutletLiquid to reb.InletLiquid;
219       
220        EQUATIONS
221       
222        if NComp > 2 then
223       
224                (trays(top).LoutLk-trays(top).LinLK)*trays(top).m=(trays(top).VoutLk-condVoutLk);
225       
226                for i in [(top+1):NTrays] do
227                (trays(i).LoutLk-trays(i).LinLK)*trays(i).m=(trays(i).VoutLk-trays(i-1).VoutLk);
228                end
229       
230        else
231       
232                (trays(top).OutletLiquid.z(1)-trays(top).InletLiquid.z(1))*trays(top).m=(trays(top).OutletVapour.z(1)-cond.OutletVapour.z(1));
233       
234                for i in [(top+1):NTrays] do
235                (trays(i).OutletLiquid.z(1)-trays(i).InletLiquid.z(1))*trays(i).m=(trays(i).OutletVapour.z(1)-trays(i-1).OutletVapour.z(1));
236                end
237        end
238end
239
240Model Distillation_kettle_cond_EffFund
241        ATTRIBUTES
242        Pallete         = true;
243        Icon            = "icon/DistillationKettleCond";
244        Brief           = "Model of a distillation column with dynamic condenser and dynamic reboiler-Tray Efficiency Prediction";
245        Info            =
246"== Specify ==
247* the feed stream of each tray (Inlet);
248
249* the pump pressure difference;
250* the heat supllied in reboiler and condenser;
251* the condenser vapor outlet flow (OutletVapour.F);
252* the reboiler liquid outlet flow (OutletLiquid.F);
253* both splitter outlet flows OR one of the splitter outlet flows and the splitter frac.
254       
255== Initial Conditions ==
256* the trays temperature (OutletLiquid.T);
257* the trays liquid level (Level) OR the trays liquid flow (OutletLiquid.F);
258* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray;
259       
260* the condenser temperature (OutletLiquid.T);
261* the condenser liquid level (Level);
262* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions;
263       
264* the reboiler temperature (OutletLiquid.T);
265* the reboiler liquid level (Level);
266* (NoComps - 1) OutletLiquid (OR OutletVapour) compositions.
267";
268       
269        PARAMETERS
270        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
271        outer NComp as Integer;
272        NTrays as Integer(Brief="Number of trays", Default=2);
273        topdown as Integer(Brief="Trays counting (1=top-down, -1=bottom-up)", Default=1);
274        top as Integer(Brief="Number of top tray");
275        bot as Integer(Brief="Number of bottom tray");
276        VapourFlow as Switcher(Valid = ["on", "off"], Default = "on");
277        outer iLK as Integer (Brief="Pseudo-binary ligth key index");
278        outer iHK as Integer (Brief="Pseudo-binary heavy key index");   
279       
280        SET
281        top = (NTrays-1)*(1-topdown)/2+1;
282        bot = NTrays/top;
283       
284        VARIABLES
285        trays(NTrays) as trayEffFund;
286        cond as condenser;
287        reb as reboiler;
288        sptop as splitter_column;
289        pump1 as pump;
290        alfaTopo as Real;
291        condVoutLk as positive (Brief="Pseudo-binary approach");
292       
293        EQUATIONS
294        switch VapourFlow
295                case "on":
296                cond.InletVapour.F*trays(top).vV = alfaTopo * trays(top).HolesArea_ * sqrt(2*(trays(top).OutletVapour.P -
297                cond.OutletLiquid.P + 1e-8 * 'atm') / (trays(top).DryPdropCoeff_*trays(top).rhoV));
298                when cond.InletVapour.F < 1e-6 * 'kmol/h' switchto "off";
299               
300                case "off":
301                cond.InletVapour.F = 0 * 'mol/s';
302                when trays(top).OutletVapour.P > cond.OutletLiquid.P + 1e-1 * 'atm' switchto "on";
303        end     
304       
305        "Condenser pseudo-binary approach"
306        condVoutLk=cond.OutletVapour.z(iLK)/(cond.OutletVapour.z(iLK)+cond.OutletVapour.z(iHK));
307
308        CONNECTIONS
309        #vapor
310        reb.OutletVapour to trays(bot).InletVapour;
311        trays([top+topdown:topdown:bot]).OutletVapour to trays([top:topdown:bot-topdown]).InletVapour;
312        trays(top).OutletVapour to cond.InletVapour;
313       
314        #liquid
315        cond.OutletLiquid to sptop.Inlet;       
316        sptop.Outlet2 to pump1.Inlet;
317        pump1.Outlet to trays(top).InletLiquid;
318        trays([top:topdown:bot-topdown]).OutletLiquid to trays([top+topdown:topdown:bot]).InletLiquid;
319        trays(bot).OutletLiquid to reb.InletLiquid;
320       
321        EQUATIONS
322       
323        if NComp > 2 then
324       
325                (trays(top).LoutLk-trays(top).LinLK)*trays(top).m=(trays(top).VoutLk-condVoutLk);
326       
327                for i in [(top+1):NTrays] do
328                (trays(i).LoutLk-trays(i).LinLK)*trays(i).m=(trays(i).VoutLk-trays(i-1).VoutLk);
329                end
330       
331        else
332       
333                (trays(top).OutletLiquid.z(1)-trays(top).InletLiquid.z(1))*trays(top).m=(trays(top).OutletVapour.z(1)-cond.OutletVapour.z(1));
334       
335                for i in [(top+1):NTrays] do
336                (trays(i).OutletLiquid.z(1)-trays(i).InletLiquid.z(1))*trays(i).m=(trays(i).OutletVapour.z(1)-trays(i-1).OutletVapour.z(1));
337                end
338        end
339end
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