source: trunk/sample/stage_separators/sample_column.mso @ 233

Last change on this file since 233 was 218, checked in by Argimiro Resende Secchi, 16 years ago

Remove more convergence problems in samples.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 12.3 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* Sample file for column model
17*--------------------------------------------------------------------
18*
19* This sample file needs VRTherm DEMO(www.vrtech.com.br) to run
20* SectionColumn_Test and needs VRTherm full to run the distillation
21* column flowsheet.
22*
23*----------------------------------------------------------------------
24* Author: Paula B. Staudt
25* $Id: sample_column.mso 218 2007-03-16 02:55:04Z arge $
26*--------------------------------------------------------------------*#
27
28using "stage_separators/column";
29using "controllers/PIDIncr";
30
31# column section with 2 trays
32FlowSheet SectionColumn_Test_with2tray
33        PARAMETERS
34        PP      as Plugin(Brief="Physical Properties",
35                Type="PP",
36                Components = [ "isobutane", "benzene"],
37                LiquidModel = "PR",
38                VapourModel = "PR"
39        );
40        NComp   as Integer;
41
42        SET
43        NComp = PP.NumberOfComponents;
44       
45        DEVICES
46        sec as Section_Column;
47        feed as liquid_stream;
48        reb as vapour_stream;
49        cond as liquid_stream;
50        zero as stream;
51       
52        CONNECTIONS
53        feed to sec.trays(2).Inlet;
54        zero to sec.trays(1).Inlet;
55        reb to sec.trays(2).InletV;
56        cond to sec.trays(1).InletL;
57       
58        SPECIFY
59        feed.F = 113.4 * 'kmol/h';
60        feed.T = 291 * 'K';
61        feed.P = 168.3 * 'kPa';
62        feed.z = [0.5, 0.5];
63
64        zero.F = 0 * 'kmol/h';
65        zero.T = 300 * 'K';
66        zero.P = 1 * 'atm';
67        zero.z = [0.5, 0.5];
68        zero.v = 0;
69        zero.h = 0 * 'J/mol';
70       
71        cond.F = 68 * 'kmol/h';
72        cond.P = 150 * 'kPa';
73        cond.T = 281.75 * 'K';
74        cond.z = [0.6664, 0.3336];
75
76        reb.F = 153 * 'kmol/h';
77        reb.P = 185 * 'kPa';
78        reb.T = 328.12 * 'K';
79        reb.z = [0.001848, 0.9982];
80       
81        sec.trays.Emv = 1;
82
83        SET
84        sec.NTrays = 2;
85        #COLUMN
86        sec.trays.V = 4 * 'ft^3';
87        sec.trays.Ah = 0.394 * 'ft^2';
88        sec.trays.lw = 20.94 * 'in';
89        sec.trays.hw = 0.125 * 'ft';
90        sec.trays.Q = 0 * 'kW';
91        sec.trays.beta = 0.6;
92        sec.trays.alfa = 4;
93        sec.trays.Ap = 3.94 * 'ft^2';
94
95        INITIAL
96        sec.trays.OutletL.T = 290 *'K';
97        sec.trays.Level = 0.9 * sec.trays.hw;
98        sec.trays.OutletL.z(1) = 0.5;
99       
100        OPTIONS
101        #RelativeAccuracy = 1e-3;
102        NLASolver = "sundials";
103        TimeStep = 10;
104        TimeEnd = 1000;
105       
106# After running few seconds of transient the steady-state
107# can be obtained by using the results from that transient:
108
109        #GuessFile="SectionColumn_Test_with2tray.rlt";
110        #Dynamic = false;
111end
112
113# column section with 8 trays
114FlowSheet SectionColumn_Test_with8tray
115        PARAMETERS
116        PP      as Plugin(Brief="Physical Properties",
117                Type="PP",
118                Components = [ "isobutane", "benzene"],
119                LiquidModel = "PR",
120                VapourModel = "PR"
121        );
122        NComp   as Integer;
123
124        SET
125        NComp = PP.NumberOfComponents;
126       
127        DEVICES
128        sec as Section_Column;
129        feed as liquid_stream;
130        reb as vapour_stream;
131        cond as liquid_stream;
132        zero as stream;
133       
134        CONNECTIONS
135        feed to sec.trays(5).Inlet;
136       
137        zero to sec.trays([1:4]).Inlet;
138        zero to sec.trays([6:8]).Inlet;
139       
140        reb to sec.trays(8).InletV;
141        cond to sec.trays(1).InletL;
142       
143        SPECIFY
144        feed.F = 113.4 * 'kmol/h';
145        feed.T = 291 * 'K';
146        feed.P = 168.3 * 'kPa';
147        feed.z = [0.5, 0.5];
148
149        zero.F = 0 * 'kmol/h';
150        zero.T = 300 * 'K';
151        zero.P = 1 * 'atm';
152        zero.z = [0.5, 0.5];
153        zero.v = 0;
154        zero.h = 0 * 'J/mol';
155       
156        cond.F = 68 * 'kmol/h';
157        cond.P = 150 * 'kPa';
158        cond.T = 281.75 * 'K';
159        cond.z = [0.6664, 0.3336];
160
161        reb.F = 153 * 'kmol/h';
162        reb.P = 185 * 'kPa';
163        reb.T = 328.12 * 'K';
164        reb.z = [0.001848, 0.9982];
165       
166        sec.trays.Emv = 1;
167
168        SET
169        sec.NTrays = 8;
170        #COLUMN
171        sec.trays.V = 4 * 'ft^3';
172        sec.trays.Ah = 0.394 * 'ft^2';
173        sec.trays.lw = 20.94 * 'in';
174        sec.trays.hw = 0.125 * 'ft';
175        sec.trays.Q = 0 * 'kW';
176        sec.trays.beta = 0.6;
177        sec.trays.alfa = 4;
178        sec.trays.Ap = 3.94 * 'ft^2';
179
180        INITIAL
181        sec.trays.OutletL.T = [290:(330-290)/(sec.NTrays-1):330] *'K';
182        sec.trays.Level = 0.3 * sec.trays.hw;
183        sec.trays.OutletL.z(1) = 0.5;
184       
185        OPTIONS
186        RelativeAccuracy = 1e-5;
187        TimeStep = 1;
188        TimeEnd = 100;
189        #GuessFile="SectionColumn_Test_with8tray.rlt";
190        #Dynamic = false;
191end
192
193
194FlowSheet Distillation_kettle_cond_Test
195        PARAMETERS
196        PP      as Plugin(Brief="Physical Properties",
197                Type="PP",
198                Components = [ "isobutane", "n-pentane", "propylene",
199                "benzene", "isobutene" ],
200                LiquidModel = "PR",
201                VapourModel = "PR"
202        );
203        NComp   as Integer;
204       
205        VARIABLES
206        Qc as heat_rate (Brief="Heat rate removed from condenser");
207        Qr as heat_rate (Brief="Heat rate supplied to reboiler");
208       
209        SET
210        NComp = PP.NumberOfComponents;
211
212        DEVICES
213        col as Distillation_kettle_cond;
214        feed as source;
215        zero as stream;
216       
217        CONNECTIONS
218        feed.Outlet to col.trays(5).Inlet;
219        zero to col.reb.Inlet;
220        zero to col.trays([1:4]).Inlet;
221        zero to col.trays([6:col.NTrays]).Inlet;
222        Qc to col.cond.Q;
223        Qr to col.reb.Q;
224       
225        SPECIFY
226        feed.Outlet.F = 113.4 * 'kmol/h';
227        feed.Outlet.T = 291 * 'K';
228        feed.Outlet.P = 168.3 * 'kPa';
229        feed.Outlet.z = 1/NComp;
230       
231        zero.F = 0 * 'kmol/h';
232        zero.T = 300 * 'K';
233        zero.P = 1 * 'atm';
234        zero.z = 1/NComp;
235        zero.v = 0;
236        zero.h = 0 * 'J/mol';
237       
238        col.sptop.Outlet2.F = 85 * 'kmol/h';
239        col.reb.OutletL.F = 28.4 * 'kmol/h';
240        col.sptop.frac = 0.444445;
241        col.cond.OutletV.F = 0 * 'kmol/h';
242        Qr = 3.7743e6 * 'kJ/h';
243        Qc = -3.71e6 * 'kJ/h';
244        col.pump1.dP = 16 * 'kPa';
245        col.trays.Emv = 1;
246       
247        SET
248        col.NTrays = 8;
249        col.cond.V = 2 * 'm^3';
250        col.cond.Across = 1 * 'm^2';
251        col.trays.V = 4 * 'ft^3';
252        col.trays.Ah = 0.394 * 'ft^2';
253        col.trays.lw = 20.94 * 'in';
254        col.trays.hw = 0.125 * 'ft';
255        col.trays.Q = 0 * 'kW';
256        col.trays.beta = 0.6;
257        col.trays.alfa = 4;
258        col.trays.Ap = 3.94 * 'ft^2';
259        col.reb.V = 2 * 'm^3';
260        col.reb.Across = 1 * 'm^2';
261       
262        INITIAL
263        # condenser
264        col.cond.OutletL.T = 260 *'K';
265        col.cond.Level = 1 * 'm';
266        col.cond.OutletL.z([1:4]) = [0.65, 0.05, 0.01, 0.01];
267
268        # reboiler
269        col.reb.OutletL.T = 330 *'K';
270        col.reb.Level = 1 * 'm';
271        col.reb.OutletL.z([1:4]) = [0.1, 0.7, 0.01, 0.01];
272
273        # column trays
274        col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * 'K';
275        col.trays.Level = 1.2 * col.trays.hw;
276        col.trays.OutletL.z([1:4]) = [0.5, 0.05, 0.01, 0.01];
277
278        OPTIONS
279        RelativeAccuracy = 1e-3;
280        TimeStep = 0.1;
281        TimeEnd = 50;
282        #time = [0:0.01:1, 2:50];
283        #GuessFile="Distillation_kettle_cond_Test.rlt";
284        #Dynamic = false;       
285end
286
287FlowSheet Column_ctrl
288        PARAMETERS
289        PP      as Plugin(Brief="Physical Properties",
290                Type="PP",
291                Components = [ "isobutane", "n-pentane", "propylene",
292                        "benzene", "isobutene" ],
293                LiquidModel = "PR",
294                VapourModel = "PR"
295        );
296        NComp   as Integer;
297       
298        Qcmin as heat_rate (Brief="Minimum Condenser Heat supplied");
299        Qcmax as heat_rate (Brief="Maximum Condenser Heat supplied");
300        Qrmin as heat_rate (Brief="Minimum Reboiler Heat supplied");
301        Qrmax as heat_rate (Brief="Maximum Reboiler Heat supplied");
302        Frmin as flow_mol (Brief="Minimum bottom flow rate");
303        Frmax as flow_mol (Brief="Maximum bottom flow rate");
304        Fcmin as flow_mol (Brief="Minimum reflux flow rate");
305        Fcmax as flow_mol (Brief="Maximum reflux flow rate");
306        Hmint as length (Brief="Minimum liquid level in top tank");
307        Hmaxt as length (Brief="Maximum liquid level in top tank");
308    Hminb as length (Brief="Minimum liquid level in reboiler");
309        Hmaxb as length (Brief="Maximum liquid level in reboiler");
310        Pmax as pressure (Brief="Maximum column pressure");
311        Pmin as pressure (Brief="Minimum column pressure");
312        Tmax as temperature (Brief="Maximum column temperature");
313        Tmin as temperature (Brief="Minimum column temperature");
314
315        VARIABLES
316        Qc as heat_rate (Brief="Heat rate removed from condenser");
317        Qr as heat_rate (Brief="Heat rate supplied to reboiler");
318        Had_top as Real (Brief="Dimensionless condenser level");
319        Had_bot as Real (Brief="Dimensionless reboiler level");
320        Pad as Real (Brief="Dimensionless pressure");
321        Tad as Real (Brief="Dimensionless temperature");
322        RR      as positive (Brief="Reflux ratio");
323
324        SET
325        NComp = PP.NumberOfComponents;
326
327        DEVICES
328        col as Distillation_kettle_cond;
329        feed as source;
330        zero as stream;
331        TCcond as PIDIncr_Ideal_AW;
332        LCtop as PIDIncr_Ideal_AW;
333        LCbot as PIDIncr_Ideal_AW;
334        PC as PIDIncr_Ideal_AW;
335
336        CONNECTIONS
337        feed.Outlet to col.trays(5).Inlet;
338        zero to col.reb.Inlet;
339        zero to col.trays([1:4]).Inlet;
340        zero to col.trays([6:col.NTrays]).Inlet;
341        Qc to col.cond.Q;
342        Qr to col.reb.Q;
343
344        EQUATIONS
345   "Temperature Controller"
346        TCcond.Parameters.tau = 0*'s'; 
347        TCcond.Parameters.tauSet = 0*'s';       
348        TCcond.Parameters.alpha = 0.3;
349        TCcond.Parameters.bias = 0.5;   
350        TCcond.Parameters.gamma = 1;
351        TCcond.Parameters.beta = 1;
352        TCcond.Options.action = 1;
353        TCcond.Options.clip = 1;
354        TCcond.Options.autoMan = 0;
355        TCcond.Parameters.intTime = 60*'s';
356        TCcond.Parameters.gain = 0.6;
357        TCcond.Parameters.derivTime = 1*'s';
358        TCcond.Ports.setPoint = ((15+273.15) * 'K' - Tmin)/(Tmax-Tmin);
359        TCcond.Ports.input = Tad;
360        Tad = (col.cond.OutletL.T-Tmin)/(Tmax-Tmin);
361        Qc = Qcmin+(Qcmax-Qcmin)*TCcond.Ports.output;   
362
363        "Pressure Controller"
364        PC.Parameters.tau = 0*'s';     
365        PC.Parameters.tauSet = 0*'s';   
366        PC.Parameters.alpha = 0.3;
367        PC.Parameters.bias = 0;
368        PC.Parameters.gamma = 1;
369        PC.Parameters.beta = 1;
370        PC.Options.action = -1;
371        PC.Options.clip = 1;
372        PC.Options.autoMan = 0;
373        PC.Parameters.intTime = 50*'s';
374        PC.Parameters.gain = 0.5;
375        PC.Parameters.derivTime = 1*'s';
376        PC.Ports.setPoint = (2.0*'bar'-Pmin)/(Pmax-Pmin);
377        PC.Ports.input = Pad;
378        Pad = (col.cond.OutletV.P-Pmin)/(Pmax-Pmin);
379        col.cond.OutletV.F = (Fcmin+(Fcmax-Fcmin)*PC.Ports.output);     
380       
381        "Ttop Level Controller"
382        LCtop.Parameters.tau = 0*'s';   
383        LCtop.Parameters.tauSet = 0*'s';       
384        LCtop.Parameters.alpha = 0.3;
385        LCtop.Parameters.bias = 0.5;   
386        LCtop.Parameters.gamma = 1;
387        LCtop.Parameters.beta = 1;
388        LCtop.Options.action = -1;
389        LCtop.Options.clip = 1;
390        LCtop.Options.autoMan = 0;
391        LCtop.Parameters.intTime = 10*'s';
392        LCtop.Parameters.gain = 1;
393        LCtop.Parameters.derivTime = 0*'s';
394        LCtop.Ports.setPoint = (1.0 * 'm' - Hmint)/(Hmaxt-Hmint);
395        LCtop.Ports.input = Had_top;
396        Had_top = (col.cond.Level-Hmint)/(Hmaxt-Hmint);
397        col.sptop.Outlet1.F = Fcmin + (Fcmax-Fcmin) * LCtop.Ports.output;
398
399        "Tbottom Level Controller"
400        LCbot.Parameters.tau = 0*'s';   
401        LCbot.Parameters.tauSet = 0*'s';       
402        LCbot.Parameters.alpha = 0.3;
403        LCbot.Parameters.bias = 0.5;   
404        LCbot.Parameters.gamma = 1;
405        LCbot.Parameters.beta = 1;
406        LCbot.Options.action = -1;
407        LCbot.Options.clip = 1;
408        LCbot.Options.autoMan = 0;
409        LCbot.Parameters.intTime = 100*'s';
410        LCbot.Parameters.gain = 1;
411        LCbot.Parameters.derivTime = 0*'s';
412        LCbot.Ports.setPoint = (1.0 * 'm' - Hminb)/(Hmaxb-Hminb);
413        LCbot.Ports.input = Had_bot;
414        Had_bot = (col.reb.Level-Hminb)/(Hmaxb-Hminb);
415        col.reb.OutletL.F = Frmin + (Frmax-Frmin) * LCbot.Ports.output;
416
417        RR * (col.cond.OutletV.F + col.sptop.Outlet1.F) = col.sptop.Outlet2.F;
418       
419        if time < 1 * 'h' then
420                col.sptop.Outlet2.F = 70 * 'kmol/h'; # reflux
421        else
422                col.sptop.Outlet2.F = 85 * 'kmol/h'; # reflux
423        end
424
425        SPECIFY
426        feed.Outlet.F = 113.4 * 'kmol/h';
427        feed.Outlet.T = 291 * 'K';
428        feed.Outlet.P = 168.3 * 'kPa';
429        feed.Outlet.z = 1/NComp;
430       
431        zero.F = 0 * 'kmol/h';
432        zero.T = 300 * 'K';
433        zero.P = 1 * 'atm';
434        zero.z = 1/NComp;
435        zero.v = 0;
436        zero.h = 0 * 'J/mol';
437       
438        Qr = 3e6 * 'kJ/h';
439        col.pump1.dP = 16 * 'kPa';
440        col.trays.Emv = 1;
441
442        SET
443        col.NTrays = 8;
444        col.cond.V = 2 * 'm^3';
445        col.cond.Across = 1 * 'm^2';
446        col.trays.V = 4 * 'ft^3';
447        col.trays.Ah = 0.394 * 'ft^2';
448        col.trays.lw = 20.94 * 'in';
449        col.trays.hw = 0.125 * 'ft';
450        col.trays.Q = 0 * 'kW';
451        col.trays.beta = 0.6;
452        col.trays.alfa = 4;
453        col.trays.Ap = 3.94 * 'ft^2';
454        col.reb.V = 2 * 'm^3';
455        col.reb.Across = 1 * 'm^2';
456
457        Qrmax = 5e6 * 'kJ/h';
458        Qrmin = 1e6 * 'kJ/h';
459        Frmin = 0 * 'kmol/h';
460        Frmax = 60 * 'kmol/h';
461        Fcmin = 0 * 'kmol/h';
462        Fcmax = 120 * 'kmol/h';
463        Hmint = 0 * 'm';
464        Hmaxt = 2 * 'm';
465        Hminb = 0 * 'm';
466        Hmaxb = 2 * 'm';
467        Pmin = 0.5 * 'bar';
468        Pmax = 4 * 'bar';
469        Qcmax = -5e5 * 'kJ/h';
470        Qcmin = -5e6 * 'kJ/h';
471        Tmax = (30+273.15) * 'K';
472        Tmin = (-20+273.15) * 'K';
473       
474        INITIAL
475        # condenser
476        col.cond.OutletL.T = 260 *'K';
477        col.cond.Level = 1 * 'm';
478        col.cond.OutletL.z([1:4]) = [0.2, 0.2, 0.4, 0.05];
479
480        # reboiler
481        col.reb.OutletL.T = 350 *'K';
482        col.reb.Level = 1 * 'm';
483        col.reb.OutletL.z([1:4]) = [0.1, 0.4, 0.1, 0.3];
484
485        # column trays
486        col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * 'K';
487        col.trays.Level = 1.2 * col.trays.hw;
488        col.trays.OutletL.z([1:4]) = [0.15, 0.3, 0.25, 0.2];
489
490        OPTIONS
491        TimeStep = 0.1;
492        TimeEnd = 5;
493        TimeUnit = 'h';
494        InitialFile = "Column_ctrl.rlt";
495        #GuessFile = "Column_ctrl.rlt";
496        #Dynamic = false;
497end
498
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