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 555 2008-07-18 19:01:13Z rafael $ |
---|
26 | *--------------------------------------------------------------------*# |
---|
27 | |
---|
28 | using "stage_separators/column"; |
---|
29 | using "controllers/PIDIncr"; |
---|
30 | |
---|
31 | # column section with 2 trays |
---|
32 | FlowSheet 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.P = 185 * 'kPa'; |
---|
77 | reb.T = 328.12 * 'K'; |
---|
78 | reb.z = [0.001848, 0.9982]; |
---|
79 | |
---|
80 | sec.trays.Emv = 1; |
---|
81 | sec.trays(1).OutletV.F = 150 * 'kmol/h'; |
---|
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 = 270 *'K'; |
---|
97 | sec.trays.Level = 0.9 * sec.trays.hw; |
---|
98 | sec.trays.OutletL.z(1) = 0.5; |
---|
99 | |
---|
100 | OPTIONS |
---|
101 | TimeStep = 10; |
---|
102 | TimeEnd = 1000; |
---|
103 | |
---|
104 | # After running few seconds of transient the steady-state |
---|
105 | # can be obtained by using the results from that transient: |
---|
106 | |
---|
107 | #GuessFile="SectionColumn_Test_with2tray.rlt"; |
---|
108 | #Dynamic = false; |
---|
109 | end |
---|
110 | |
---|
111 | # column section with 8 trays |
---|
112 | FlowSheet SectionColumn_Test_with8tray |
---|
113 | PARAMETERS |
---|
114 | PP as Plugin(Brief="Physical Properties", |
---|
115 | Type="PP", |
---|
116 | Components = [ "isobutane", "benzene"], |
---|
117 | LiquidModel = "PR", |
---|
118 | VapourModel = "PR" |
---|
119 | ); |
---|
120 | NComp as Integer; |
---|
121 | |
---|
122 | SET |
---|
123 | NComp = PP.NumberOfComponents; |
---|
124 | |
---|
125 | DEVICES |
---|
126 | sec as Section_Column; |
---|
127 | feed as liquid_stream; |
---|
128 | reb as vapour_stream; |
---|
129 | cond as liquid_stream; |
---|
130 | zero as stream; |
---|
131 | |
---|
132 | CONNECTIONS |
---|
133 | feed to sec.trays(5).Inlet; |
---|
134 | |
---|
135 | zero to sec.trays([1:4]).Inlet; |
---|
136 | zero to sec.trays([6:8]).Inlet; |
---|
137 | |
---|
138 | reb to sec.trays(8).InletV; |
---|
139 | cond to sec.trays(1).InletL; |
---|
140 | |
---|
141 | SPECIFY |
---|
142 | feed.F = 113.4 * 'kmol/h'; |
---|
143 | feed.T = 291 * 'K'; |
---|
144 | feed.P = 168.3 * 'kPa'; |
---|
145 | feed.z = [0.5, 0.5]; |
---|
146 | |
---|
147 | zero.F = 0 * 'kmol/h'; |
---|
148 | zero.T = 300 * 'K'; |
---|
149 | zero.P = 1 * 'atm'; |
---|
150 | zero.z = [0.5, 0.5]; |
---|
151 | zero.v = 0; |
---|
152 | zero.h = 0 * 'J/mol'; |
---|
153 | |
---|
154 | cond.F = 68 * 'kmol/h'; |
---|
155 | cond.P = 150 * 'kPa'; |
---|
156 | cond.T = 281.75 * 'K'; |
---|
157 | cond.z = [0.6664, 0.3336]; |
---|
158 | |
---|
159 | # reb.F = 153 * 'kmol/h'; |
---|
160 | reb.P = 185 * 'kPa'; |
---|
161 | reb.T = 328.12 * 'K'; |
---|
162 | reb.z = [0.001848, 0.9982]; |
---|
163 | |
---|
164 | sec.trays.Emv = 1; |
---|
165 | sec.trays(1).OutletV.F = 150 * 'kmol/h'; |
---|
166 | |
---|
167 | SET |
---|
168 | sec.NTrays = 8; |
---|
169 | #COLUMN |
---|
170 | sec.trays.V = 4 * 'ft^3'; |
---|
171 | sec.trays.Ah = 0.394 * 'ft^2'; |
---|
172 | sec.trays.lw = 20.94 * 'in'; |
---|
173 | sec.trays.hw = 0.125 * 'ft'; |
---|
174 | sec.trays.Q = 0 * 'kW'; |
---|
175 | sec.trays.beta = 0.6; |
---|
176 | sec.trays.alfa = 4; |
---|
177 | sec.trays.Ap = 3.94 * 'ft^2'; |
---|
178 | |
---|
179 | INITIAL |
---|
180 | sec.trays.OutletL.T = [290:(300-290)/(sec.NTrays-1):300] *'K'; |
---|
181 | sec.trays.Level = 0.3 * sec.trays.hw; |
---|
182 | sec.trays.OutletL.z(1) = 0.5; |
---|
183 | |
---|
184 | OPTIONS |
---|
185 | TimeStep = 1; |
---|
186 | TimeEnd = 100; |
---|
187 | #GuessFile="SectionColumn_Test_with8tray.rlt"; |
---|
188 | #Dynamic = false; |
---|
189 | end |
---|
190 | |
---|
191 | |
---|
192 | FlowSheet Distillation_kettle_cond_Test |
---|
193 | PARAMETERS |
---|
194 | PP as Plugin(Brief="Physical Properties", |
---|
195 | Type="PP", |
---|
196 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
197 | "benzene", "isobutene" ], |
---|
198 | LiquidModel = "PR", |
---|
199 | VapourModel = "PR" |
---|
200 | ); |
---|
201 | NComp as Integer; |
---|
202 | |
---|
203 | VARIABLES |
---|
204 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
---|
205 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
---|
206 | |
---|
207 | SET |
---|
208 | NComp = PP.NumberOfComponents; |
---|
209 | |
---|
210 | DEVICES |
---|
211 | col as Distillation_kettle_cond; |
---|
212 | feed as source; |
---|
213 | zero as stream; |
---|
214 | |
---|
215 | CONNECTIONS |
---|
216 | feed.Outlet to col.trays(5).Inlet; |
---|
217 | zero to col.reb.Inlet; |
---|
218 | zero to col.trays([1:4]).Inlet; |
---|
219 | zero to col.trays([6:col.NTrays]).Inlet; |
---|
220 | Qc.OutletQ to col.cond.InletQ; |
---|
221 | Qr.OutletQ to col.reb.InletQ; |
---|
222 | |
---|
223 | SPECIFY |
---|
224 | feed.Outlet.F = 113.4 * 'kmol/h'; |
---|
225 | feed.Outlet.T = 291 * 'K'; |
---|
226 | feed.Outlet.P = 168.3 * 'kPa'; |
---|
227 | feed.Outlet.z = 1/NComp; |
---|
228 | |
---|
229 | zero.F = 0 * 'kmol/h'; |
---|
230 | zero.T = 300 * 'K'; |
---|
231 | zero.P = 1 * 'atm'; |
---|
232 | zero.z = 1/NComp; |
---|
233 | zero.v = 0; |
---|
234 | zero.h = 0 * 'J/mol'; |
---|
235 | |
---|
236 | col.sptop.Outlet2.F = 85 * 'kmol/h'; |
---|
237 | col.reb.OutletL.F = 28.4 * 'kmol/h'; |
---|
238 | col.sptop.frac = 0.444445; |
---|
239 | col.cond.OutletV.F = 0 * 'kmol/h'; |
---|
240 | Qr.OutletQ = 3.7743e6 * 'kJ/h'; |
---|
241 | Qc.OutletQ = -3.71e6 * 'kJ/h'; |
---|
242 | col.pump1.dP = 16 * 'kPa'; |
---|
243 | col.trays.Emv = 1; |
---|
244 | |
---|
245 | col.alfaTopo = 2; |
---|
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 = 350 *'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 | TimeStep = 0.1; |
---|
280 | TimeEnd = 50; |
---|
281 | #GuessFile="Distillation_kettle_cond_Test.rlt"; |
---|
282 | #Dynamic = false; |
---|
283 | end |
---|
284 | |
---|
285 | |
---|
286 | FlowSheet Column_ctrl |
---|
287 | PARAMETERS |
---|
288 | PP as Plugin(Brief="Physical Properties", |
---|
289 | Type="PP", |
---|
290 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
291 | "benzene", "isobutene" ], |
---|
292 | LiquidModel = "PR", |
---|
293 | VapourModel = "PR" |
---|
294 | ); |
---|
295 | NComp as Integer; |
---|
296 | |
---|
297 | Qcmin as heat_rate (Brief="Minimum Condenser Heat supplied"); |
---|
298 | Qcmax as heat_rate (Brief="Maximum Condenser Heat supplied"); |
---|
299 | Qrmin as heat_rate (Brief="Minimum Reboiler Heat supplied"); |
---|
300 | Qrmax as heat_rate (Brief="Maximum Reboiler Heat supplied"); |
---|
301 | Frmin as flow_mol (Brief="Minimum bottom flow rate"); |
---|
302 | Frmax as flow_mol (Brief="Maximum bottom flow rate"); |
---|
303 | Fcmin as flow_mol (Brief="Minimum reflux flow rate"); |
---|
304 | Fcmax as flow_mol (Brief="Maximum reflux flow rate"); |
---|
305 | Hmint as length (Brief="Minimum liquid level in top tank"); |
---|
306 | Hmaxt as length (Brief="Maximum liquid level in top tank"); |
---|
307 | Hminb as length (Brief="Minimum liquid level in reboiler"); |
---|
308 | Hmaxb as length (Brief="Maximum liquid level in reboiler"); |
---|
309 | Pmax as pressure (Brief="Maximum column pressure"); |
---|
310 | Pmin as pressure (Brief="Minimum column pressure"); |
---|
311 | Tmax as temperature (Brief="Maximum column temperature"); |
---|
312 | Tmin as temperature (Brief="Minimum column temperature"); |
---|
313 | |
---|
314 | VARIABLES |
---|
315 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
---|
316 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
---|
317 | Had_top as Real (Brief="Dimensionless condenser level"); |
---|
318 | Had_bot as Real (Brief="Dimensionless reboiler level"); |
---|
319 | Pad as Real (Brief="Dimensionless pressure"); |
---|
320 | Tad as Real (Brief="Dimensionless temperature"); |
---|
321 | RR as positive (Brief="Reflux ratio"); |
---|
322 | |
---|
323 | SET |
---|
324 | NComp = PP.NumberOfComponents; |
---|
325 | |
---|
326 | DEVICES |
---|
327 | col as Distillation_kettle_cond; |
---|
328 | feed as source; |
---|
329 | zero as stream; |
---|
330 | TCcond as PIDIncr; |
---|
331 | LCtop as PIDIncr; |
---|
332 | LCbot as PIDIncr; |
---|
333 | PC as PIDIncr; |
---|
334 | |
---|
335 | CONNECTIONS |
---|
336 | feed.Outlet to col.trays(5).Inlet; |
---|
337 | zero to col.reb.Inlet; |
---|
338 | zero to col.trays([1:4]).Inlet; |
---|
339 | zero to col.trays([6:col.NTrays]).Inlet; |
---|
340 | Qc.OutletQ to col.cond.InletQ; |
---|
341 | Qr.OutletQ to col.reb.InletQ; |
---|
342 | |
---|
343 | EQUATIONS |
---|
344 | "Temperature Controller" |
---|
345 | TCcond.Parameters.tau = 0*'s'; |
---|
346 | TCcond.Parameters.tauSet = 0*'s'; |
---|
347 | TCcond.Parameters.alpha = 0.3; |
---|
348 | TCcond.Parameters.bias = 0.5; |
---|
349 | TCcond.Parameters.gamma = 1; |
---|
350 | TCcond.Parameters.beta = 1; |
---|
351 | TCcond.Action = "Direct"; |
---|
352 | TCcond.Clip = "Clipped"; |
---|
353 | TCcond.Mode = "Automatic"; |
---|
354 | TCcond.Parameters.intTime = 60*'s'; |
---|
355 | TCcond.Parameters.gain = 0.6; |
---|
356 | TCcond.Parameters.derivTime = 1*'s'; |
---|
357 | TCcond.Ports.setPoint = ((15+273.15) * 'K' - Tmin)/(Tmax-Tmin); |
---|
358 | TCcond.Ports.input = Tad; |
---|
359 | Tad = (col.cond.OutletL.T-Tmin)/(Tmax-Tmin); |
---|
360 | Qc.OutletQ = Qcmin+(Qcmax-Qcmin)*TCcond.Ports.output; |
---|
361 | |
---|
362 | "Pressure Controller" |
---|
363 | PC.Parameters.tau = 0*'s'; |
---|
364 | PC.Parameters.tauSet = 0*'s'; |
---|
365 | PC.Parameters.alpha = 0.3; |
---|
366 | PC.Parameters.bias = 0; |
---|
367 | PC.Parameters.gamma = 1; |
---|
368 | PC.Parameters.beta = 1; |
---|
369 | PC.Action = "Reverse"; |
---|
370 | PC.Clip = "Clipped"; |
---|
371 | PC.Mode = "Automatic"; |
---|
372 | PC.Parameters.intTime = 50*'s'; |
---|
373 | PC.Parameters.gain = 0.5; |
---|
374 | PC.Parameters.derivTime = 1*'s'; |
---|
375 | PC.Ports.setPoint = (4.0*'bar'-Pmin)/(Pmax-Pmin); |
---|
376 | PC.Ports.input = Pad; |
---|
377 | Pad = (col.cond.OutletV.P-Pmin)/(Pmax-Pmin); |
---|
378 | col.cond.OutletV.F = (Fcmin+(Fcmax-Fcmin)*PC.Ports.output); |
---|
379 | |
---|
380 | "Ttop Level Controller" |
---|
381 | LCtop.Parameters.tau = 0*'s'; |
---|
382 | LCtop.Parameters.tauSet = 0*'s'; |
---|
383 | LCtop.Parameters.alpha = 0.3; |
---|
384 | LCtop.Parameters.bias = 0.5; |
---|
385 | LCtop.Parameters.gamma = 1; |
---|
386 | LCtop.Parameters.beta = 1; |
---|
387 | LCtop.Action = "Reverse"; |
---|
388 | LCtop.Clip = "Clipped"; |
---|
389 | LCtop.Mode = "Automatic"; |
---|
390 | LCtop.Parameters.intTime = 10*'s'; |
---|
391 | LCtop.Parameters.gain = 1; |
---|
392 | LCtop.Parameters.derivTime = 0*'s'; |
---|
393 | LCtop.Ports.setPoint = (1.0 * 'm' - Hmint)/(Hmaxt-Hmint); |
---|
394 | LCtop.Ports.input = Had_top; |
---|
395 | Had_top = (col.cond.Level-Hmint)/(Hmaxt-Hmint); |
---|
396 | col.sptop.Outlet1.F = Fcmin + (Fcmax-Fcmin) * LCtop.Ports.output; |
---|
397 | |
---|
398 | "Tbottom Level Controller" |
---|
399 | LCbot.Parameters.tau = 0*'s'; |
---|
400 | LCbot.Parameters.tauSet = 0*'s'; |
---|
401 | LCbot.Parameters.alpha = 0.3; |
---|
402 | LCbot.Parameters.bias = 0.5; |
---|
403 | LCbot.Parameters.gamma = 1; |
---|
404 | LCbot.Parameters.beta = 1; |
---|
405 | LCbot.Action = "Reverse"; |
---|
406 | LCbot.Clip = "Clipped"; |
---|
407 | LCbot.Mode = "Automatic"; |
---|
408 | LCbot.Parameters.intTime = 100*'s'; |
---|
409 | LCbot.Parameters.gain = 1; |
---|
410 | LCbot.Parameters.derivTime = 0*'s'; |
---|
411 | LCbot.Ports.setPoint = (1.0 * 'm' - Hminb)/(Hmaxb-Hminb); |
---|
412 | LCbot.Ports.input = Had_bot; |
---|
413 | Had_bot = (col.reb.Level-Hminb)/(Hmaxb-Hminb); |
---|
414 | col.reb.OutletL.F = Frmin + (Frmax-Frmin) * LCbot.Ports.output; |
---|
415 | |
---|
416 | RR * (col.cond.OutletV.F + col.sptop.Outlet1.F) = col.sptop.Outlet2.F; |
---|
417 | |
---|
418 | if time < 1 * 'h' then |
---|
419 | col.sptop.Outlet2.F = 75 * 'kmol/h'; # reflux |
---|
420 | else |
---|
421 | col.sptop.Outlet2.F = 85 * 'kmol/h'; # reflux |
---|
422 | end |
---|
423 | |
---|
424 | SPECIFY |
---|
425 | feed.Outlet.F = 113.4 * 'kmol/h'; |
---|
426 | feed.Outlet.T = 291 * 'K'; |
---|
427 | feed.Outlet.P = 5 * 'bar'; |
---|
428 | feed.Outlet.z = 1/NComp; |
---|
429 | |
---|
430 | zero.F = 0 * 'kmol/h'; |
---|
431 | zero.T = 300 * 'K'; |
---|
432 | zero.P = 1 * 'atm'; |
---|
433 | zero.z = 1/NComp; |
---|
434 | zero.v = 0; |
---|
435 | zero.h = 0 * 'J/mol'; |
---|
436 | |
---|
437 | Qr.OutletQ = 4e6 * 'kJ/h'; |
---|
438 | col.pump1.dP = 16 * 'kPa'; |
---|
439 | col.trays.Emv = 1; |
---|
440 | col.alfaTopo = 2; |
---|
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 | # Controllers type |
---|
458 | TCcond.PID_Select = "Ideal_AW"; |
---|
459 | PC.PID_Select = "Ideal_AW"; |
---|
460 | LCtop.PID_Select = "Ideal_AW"; |
---|
461 | LCbot.PID_Select = "Ideal_AW"; |
---|
462 | |
---|
463 | Qrmax = 5e6 * 'kJ/h'; |
---|
464 | Qrmin = 1e6 * 'kJ/h'; |
---|
465 | Frmin = 0 * 'kmol/h'; |
---|
466 | Frmax = 60 * 'kmol/h'; |
---|
467 | Fcmin = 0 * 'kmol/h'; |
---|
468 | Fcmax = 120 * 'kmol/h'; |
---|
469 | Hmint = 0 * 'm'; |
---|
470 | Hmaxt = 2 * 'm'; |
---|
471 | Hminb = 0 * 'm'; |
---|
472 | Hmaxb = 2 * 'm'; |
---|
473 | Pmin = 0.5 * 'bar'; |
---|
474 | Pmax = 6 * 'bar'; |
---|
475 | Qcmax = -5e5 * 'kJ/h'; |
---|
476 | Qcmin = -5e6 * 'kJ/h'; |
---|
477 | Tmax = (30+273.15) * 'K'; |
---|
478 | Tmin = (-20+273.15) * 'K'; |
---|
479 | |
---|
480 | INITIAL |
---|
481 | # condenser |
---|
482 | col.cond.OutletL.T = 260 *'K'; |
---|
483 | col.cond.Level = 1 * 'm'; |
---|
484 | col.cond.OutletL.z([1:4]) = [0.2, 0.2, 0.4, 0.05]; |
---|
485 | |
---|
486 | # reboiler |
---|
487 | col.reb.OutletL.T = 350 *'K'; |
---|
488 | col.reb.Level = 1 * 'm'; |
---|
489 | col.reb.OutletL.z([1:4]) = [0.1, 0.4, 0.1, 0.3]; |
---|
490 | |
---|
491 | # column trays |
---|
492 | col.trays.OutletL.T = [290:(330-290)/(col.NTrays-1):330] * 'K'; |
---|
493 | col.trays.Level = 1.2 * col.trays.hw; |
---|
494 | col.trays.OutletL.z([1:4]) = [0.15, 0.3, 0.25, 0.2]; |
---|
495 | |
---|
496 | OPTIONS |
---|
497 | TimeStep = 0.1; |
---|
498 | TimeEnd = 5; |
---|
499 | TimeUnit = 'h'; |
---|
500 | InitialFile = "Column_ctrl.rlt"; |
---|
501 | DAESolver(File="dassl"); |
---|
502 | #GuessFile = "Column_ctrl.rlt"; |
---|
503 | #Dynamic = false; |
---|
504 | end |
---|
505 | |
---|
506 | # packed column section with 8 trays |
---|
507 | FlowSheet PackedSectionColumn |
---|
508 | PARAMETERS |
---|
509 | PP as Plugin(Brief="Physical Properties", |
---|
510 | Type="PP", |
---|
511 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
512 | "benzene", "isobutene" ], |
---|
513 | LiquidModel = "PR", |
---|
514 | VapourModel = "PR" |
---|
515 | ); |
---|
516 | NComp as Integer; |
---|
517 | |
---|
518 | SET |
---|
519 | NComp = PP.NumberOfComponents; |
---|
520 | |
---|
521 | DEVICES |
---|
522 | sec as Packed_Section_Column; |
---|
523 | feed as liquid_stream; |
---|
524 | reb as vapour_stream; |
---|
525 | cond as liquid_stream; |
---|
526 | zero as stream; |
---|
527 | |
---|
528 | CONNECTIONS |
---|
529 | feed to sec.stage(5).Inlet; |
---|
530 | zero to sec.stage([1:4]).Inlet; |
---|
531 | zero to sec.stage([6:sec.NStages]).Inlet; |
---|
532 | reb to sec.stage(8).InletV; |
---|
533 | cond to sec.stage(1).InletL; |
---|
534 | |
---|
535 | SPECIFY |
---|
536 | feed.F = 113.4 * 'kmol/h'; |
---|
537 | feed.T = 291 * 'K'; |
---|
538 | feed.P = 1.66 * 'atm'; |
---|
539 | feed.z = [0.2, 0.2, 0.2, 0.2, 0.2]; |
---|
540 | |
---|
541 | zero.F = 0 * 'kmol/h'; |
---|
542 | zero.T = 300 * 'K'; |
---|
543 | zero.P = 1 * 'atm'; |
---|
544 | zero.z = [0.2, 0.2, 0.2, 0.2, 0.2]; |
---|
545 | zero.v = 0; |
---|
546 | zero.h = 0 * 'J/mol'; |
---|
547 | |
---|
548 | cond.F = 85 * 'kmol/h'; |
---|
549 | cond.P = 2.33 * 'atm'; |
---|
550 | cond.T = 283.5 * 'K'; |
---|
551 | cond.z = [0.599, 0.044, 0.035, 0.007, 0.315]; |
---|
552 | |
---|
553 | reb.F = 137.57 * 'kmol/h'; |
---|
554 | reb.P = 2.46 * 'atm'; |
---|
555 | reb.T = 325 * 'K'; |
---|
556 | reb.z = [0.16, 0.542, 0.013, 0.008, 0.277]; |
---|
557 | |
---|
558 | sec.dP = 0.008 * 'atm'; #queda de pressao na secao! |
---|
559 | |
---|
560 | SET |
---|
561 | sec.H = 4 * 'm';#altura do recheio |
---|
562 | sec.NStages = 8; #numero de estagios teoricos do recheio |
---|
563 | sec.stage.Q = 0 * 'kW'; |
---|
564 | sec.stage.d = 1.009 * 'm'; |
---|
565 | sec.stage.Cpo = 0.763; |
---|
566 | sec.stage.e = 0.951; |
---|
567 | sec.stage.a = 112.6 * 'm^2/m^3'; |
---|
568 | sec.stage.Qsil = 0.1;#coeficiente de resistencia do recheio |
---|
569 | |
---|
570 | INITIAL |
---|
571 | sec.stage.OutletL.T =[283:(325-283)/(sec.NStages-1):325] *'K'; |
---|
572 | sec.stage.ML = 0.01 * 'kmol'; |
---|
573 | sec.stage.OutletL.z([1:4]) = [0.3, 0.2, 0.002, 0.1]; |
---|
574 | |
---|
575 | OPTIONS |
---|
576 | DAESolver(File="dassl"); |
---|
577 | NLASolver(File="nlasolver"); |
---|
578 | TimeStep = 10; |
---|
579 | TimeEnd = 100; |
---|
580 | end |
---|
581 | |
---|
582 | FlowSheet Packed_kettle_cond_Test |
---|
583 | PARAMETERS |
---|
584 | PP as Plugin(Brief="Physical Properties", |
---|
585 | Type="PP", |
---|
586 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
587 | "benzene", "isobutene" ], |
---|
588 | LiquidModel = "PR", |
---|
589 | VapourModel = "PR" |
---|
590 | ); |
---|
591 | NComp as Integer; |
---|
592 | |
---|
593 | VARIABLES |
---|
594 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
---|
595 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
---|
596 | |
---|
597 | SET |
---|
598 | NComp = PP.NumberOfComponents; |
---|
599 | |
---|
600 | DEVICES |
---|
601 | col as PackedDistillation_kettle_cond; |
---|
602 | feed as source; |
---|
603 | zero as stream; |
---|
604 | |
---|
605 | CONNECTIONS |
---|
606 | feed.Outlet to col.stage(5).Inlet; |
---|
607 | zero to col.reb.Inlet; |
---|
608 | zero to col.stage([1:4]).Inlet; |
---|
609 | zero to col.stage([6:col.NStages]).Inlet; |
---|
610 | Qc.OutletQ to col.cond.InletQ; |
---|
611 | Qr.OutletQ to col.reb.InletQ; |
---|
612 | |
---|
613 | SPECIFY |
---|
614 | feed.Outlet.F = 113.4 * 'kmol/h'; |
---|
615 | feed.Outlet.T = 291 * 'K'; |
---|
616 | feed.Outlet.P = 168.3 * 'kPa'; |
---|
617 | feed.Outlet.z = 1/NComp; |
---|
618 | |
---|
619 | zero.F = 0 * 'kmol/h'; |
---|
620 | zero.T = 300 * 'K'; |
---|
621 | zero.P = 1 * 'atm'; |
---|
622 | zero.z = 1/NComp; |
---|
623 | zero.v = 0; |
---|
624 | zero.h = 0 * 'J/mol'; |
---|
625 | |
---|
626 | col.sptop.Outlet2.F = 85 * 'kmol/h'; |
---|
627 | col.reb.OutletL.F = 28.4 * 'kmol/h'; |
---|
628 | col.sptop.frac = 0.444445; |
---|
629 | col.cond.OutletV.F = 0 * 'kmol/h'; |
---|
630 | Qr.OutletQ = 3.7743e6 * 'kJ/h'; |
---|
631 | Qc.OutletQ = -3.71e6 * 'kJ/h'; |
---|
632 | col.pump1.dP = 16 * 'kPa'; |
---|
633 | |
---|
634 | col.dP = 0.024 * 'atm'; #queda de pressao entre o topo e o fundo da coluna. |
---|
635 | |
---|
636 | SET |
---|
637 | col.H = 3.5 * 'm'; # altura de recheio |
---|
638 | col.NStages = 8; # numero de estagios teoricos do recheio |
---|
639 | col.stage.Q = 0 * 'kW'; |
---|
640 | col.stage.d = 2.24 * 'ft'; |
---|
641 | col.stage.Cpo = 0.763; |
---|
642 | col.stage.e = 0.951; |
---|
643 | col.stage.a = 112.6 * 'm^2/m^3'; |
---|
644 | |
---|
645 | col.cond.V = 2 * 'm^3'; |
---|
646 | col.cond.Across = 1 * 'm^2'; |
---|
647 | col.reb.V = 2 * 'm^3'; |
---|
648 | col.reb.Across = 1 * 'm^2'; |
---|
649 | col.stage.Qsil = 2; # coeficiente de resistencia do recheio |
---|
650 | |
---|
651 | INITIAL |
---|
652 | # condenser |
---|
653 | col.cond.OutletL.T = 260 *'K'; |
---|
654 | col.cond.Level = 1 * 'm'; |
---|
655 | col.cond.OutletL.z([1:4]) = [0.65, 0.05, 0.01, 0.01]; |
---|
656 | |
---|
657 | # reboiler |
---|
658 | col.reb.OutletL.T = 330 *'K'; |
---|
659 | col.reb.Level = 1 * 'm'; |
---|
660 | col.reb.OutletL.z([1:4]) = [0.1, 0.7, 0.01, 0.01]; |
---|
661 | |
---|
662 | # column trays |
---|
663 | col.stage.OutletL.T = [290:(330-290)/(col.NStages-1):330] * 'K'; |
---|
664 | col.stage.ML = 0.1 * 'kmol'; |
---|
665 | col.stage.OutletL.z([1:4]) = [0.15, 0.5, 0.001, 0.1]; |
---|
666 | |
---|
667 | OPTIONS |
---|
668 | TimeStep = 10; |
---|
669 | TimeEnd = 500; |
---|
670 | end |
---|
671 | |
---|
672 | FlowSheet PackedColumn_ctrl |
---|
673 | PARAMETERS |
---|
674 | PP as Plugin(Brief="Physical Properties", |
---|
675 | Type="PP", |
---|
676 | Components = [ "isobutane", "n-pentane", "propylene", |
---|
677 | "benzene", "isobutene" ], |
---|
678 | LiquidModel = "PR", |
---|
679 | VapourModel = "PR" |
---|
680 | ); |
---|
681 | NComp as Integer; |
---|
682 | |
---|
683 | Qcmin as heat_rate (Brief="Minimum Condenser Heat supplied"); |
---|
684 | Qcmax as heat_rate (Brief="Maximum Condenser Heat supplied"); |
---|
685 | Qrmin as heat_rate (Brief="Minimum Reboiler Heat supplied"); |
---|
686 | Qrmax as heat_rate (Brief="Maximum Reboiler Heat supplied"); |
---|
687 | Frmin as flow_mol (Brief="Minimum bottom flow rate"); |
---|
688 | Frmax as flow_mol (Brief="Maximum bottom flow rate"); |
---|
689 | Fcmin as flow_mol (Brief="Minimum reflux flow rate"); |
---|
690 | Fcmax as flow_mol (Brief="Maximum reflux flow rate"); |
---|
691 | Hmint as length (Brief="Minimum liquid level in top tank"); |
---|
692 | Hmaxt as length (Brief="Maximum liquid level in top tank"); |
---|
693 | Hminb as length (Brief="Minimum liquid level in reboiler"); |
---|
694 | Hmaxb as length (Brief="Maximum liquid level in reboiler"); |
---|
695 | Pmax as pressure (Brief="Maximum column pressure"); |
---|
696 | Pmin as pressure (Brief="Minimum column pressure"); |
---|
697 | Tmax as temperature (Brief="Maximum column temperature"); |
---|
698 | Tmin as temperature (Brief="Minimum column temperature"); |
---|
699 | |
---|
700 | VARIABLES |
---|
701 | Qc as energy_source (Brief="Heat rate removed from condenser"); |
---|
702 | Qr as energy_source (Brief="Heat rate supplied to reboiler"); |
---|
703 | Had_top as Real (Brief="Dimensionless condenser level"); |
---|
704 | Had_bot as Real (Brief="Dimensionless reboiler level"); |
---|
705 | Pad as Real (Brief="Dimensionless pressure"); |
---|
706 | Tad as Real (Brief="Dimensionless temperature"); |
---|
707 | RR as positive (Brief="Reflux ratio"); |
---|
708 | |
---|
709 | SET |
---|
710 | NComp = PP.NumberOfComponents; |
---|
711 | |
---|
712 | DEVICES |
---|
713 | col as PackedDistillation_kettle_cond; |
---|
714 | feed as source; |
---|
715 | zero as stream; |
---|
716 | TCcond as PIDIncr; |
---|
717 | LCtop as PIDIncr; |
---|
718 | LCbot as PIDIncr; |
---|
719 | PC as PIDIncr; |
---|
720 | |
---|
721 | CONNECTIONS |
---|
722 | feed.Outlet to col.stage(5).Inlet; |
---|
723 | zero to col.reb.Inlet; |
---|
724 | zero to col.stage([1:4]).Inlet; |
---|
725 | zero to col.stage([6:col.NStages]).Inlet; |
---|
726 | Qc.OutletQ to col.cond.InletQ; |
---|
727 | Qr.OutletQ to col.reb.InletQ; |
---|
728 | |
---|
729 | SET |
---|
730 | TCcond.Action = "Direct"; |
---|
731 | TCcond.Clip = "Clipped"; |
---|
732 | TCcond.Mode = "Automatic"; |
---|
733 | |
---|
734 | PC.Action = "Reverse"; |
---|
735 | PC.Clip = "Clipped"; |
---|
736 | PC.Mode = "Automatic"; |
---|
737 | |
---|
738 | LCtop.Action = "Reverse"; |
---|
739 | LCtop.Clip = "Clipped"; |
---|
740 | LCtop.Mode = "Automatic"; |
---|
741 | |
---|
742 | LCbot.Action = "Reverse"; |
---|
743 | LCbot.Clip = "Clipped"; |
---|
744 | LCbot.Mode = "Automatic"; |
---|
745 | |
---|
746 | EQUATIONS |
---|
747 | "Temperature Controller" |
---|
748 | TCcond.Parameters.tau = 0*'s'; |
---|
749 | TCcond.Parameters.tauSet = 0*'s'; |
---|
750 | TCcond.Parameters.alpha = 0.3; |
---|
751 | TCcond.Parameters.bias = 0.5; |
---|
752 | TCcond.Parameters.gamma = 1; |
---|
753 | TCcond.Parameters.beta = 1; |
---|
754 | TCcond.Parameters.intTime = 60*'s'; |
---|
755 | TCcond.Parameters.gain = 0.6; |
---|
756 | TCcond.Parameters.derivTime = 1*'s'; |
---|
757 | TCcond.Ports.setPoint = ((15+273.15) * 'K' - Tmin)/(Tmax-Tmin); |
---|
758 | TCcond.Ports.input = Tad; |
---|
759 | Tad = (col.cond.OutletL.T-Tmin)/(Tmax-Tmin); |
---|
760 | Qc.OutletQ = Qcmin+(Qcmax-Qcmin)*TCcond.Ports.output; |
---|
761 | |
---|
762 | "Pressure Controller" |
---|
763 | PC.Parameters.tau = 0*'s'; |
---|
764 | PC.Parameters.tauSet = 0*'s'; |
---|
765 | PC.Parameters.alpha = 0.3; |
---|
766 | PC.Parameters.bias = 0; |
---|
767 | PC.Parameters.gamma = 1; |
---|
768 | PC.Parameters.beta = 1; |
---|
769 | PC.Parameters.intTime = 50*'s'; |
---|
770 | PC.Parameters.gain = 0.5; |
---|
771 | PC.Parameters.derivTime = 1*'s'; |
---|
772 | PC.Ports.setPoint = (4.0*'bar'-Pmin)/(Pmax-Pmin); |
---|
773 | PC.Ports.input = Pad; |
---|
774 | Pad = (col.cond.OutletV.P-Pmin)/(Pmax-Pmin); |
---|
775 | col.cond.OutletV.F = (Fcmin+(Fcmax-Fcmin)*PC.Ports.output); |
---|
776 | |
---|
777 | "Ttop Level Controller" |
---|
778 | LCtop.Parameters.tau = 0*'s'; |
---|
779 | LCtop.Parameters.tauSet = 0*'s'; |
---|
780 | LCtop.Parameters.alpha = 0.3; |
---|
781 | LCtop.Parameters.bias = 0.5; |
---|
782 | LCtop.Parameters.gamma = 1; |
---|
783 | LCtop.Parameters.beta = 1; |
---|
784 | LCtop.Parameters.intTime = 10*'s'; |
---|
785 | LCtop.Parameters.gain = 1; |
---|
786 | LCtop.Parameters.derivTime = 0*'s'; |
---|
787 | LCtop.Ports.setPoint = (1.0 * 'm' - Hmint)/(Hmaxt-Hmint); |
---|
788 | LCtop.Ports.input = Had_top; |
---|
789 | Had_top = (col.cond.Level-Hmint)/(Hmaxt-Hmint); |
---|
790 | col.sptop.Outlet1.F = Fcmin + (Fcmax-Fcmin) * LCtop.Ports.output; |
---|
791 | |
---|
792 | "Tbottom Level Controller" |
---|
793 | LCbot.Parameters.tau = 0*'s'; |
---|
794 | LCbot.Parameters.tauSet = 0*'s'; |
---|
795 | LCbot.Parameters.alpha = 0.3; |
---|
796 | LCbot.Parameters.bias = 0.5; |
---|
797 | LCbot.Parameters.gamma = 1; |
---|
798 | LCbot.Parameters.beta = 1; |
---|
799 | LCbot.Parameters.intTime = 100*'s'; |
---|
800 | LCbot.Parameters.gain = 1; |
---|
801 | LCbot.Parameters.derivTime = 0*'s'; |
---|
802 | LCbot.Ports.setPoint = (1.0 * 'm' - Hminb)/(Hmaxb-Hminb); |
---|
803 | LCbot.Ports.input = Had_bot; |
---|
804 | Had_bot = (col.reb.Level-Hminb)/(Hmaxb-Hminb); |
---|
805 | col.reb.OutletL.F = Frmin + (Frmax-Frmin) * LCbot.Ports.output; |
---|
806 | |
---|
807 | RR * (col.cond.OutletV.F + col.sptop.Outlet1.F) = col.sptop.Outlet2.F; |
---|
808 | |
---|
809 | if time < 1 * 'h' then |
---|
810 | col.sptop.Outlet2.F = 75 * 'kmol/h'; # reflux |
---|
811 | else |
---|
812 | col.sptop.Outlet2.F = 85 * 'kmol/h'; # reflux |
---|
813 | end |
---|
814 | |
---|
815 | SPECIFY |
---|
816 | feed.Outlet.F = 113.4 * 'kmol/h'; |
---|
817 | feed.Outlet.T = 291 * 'K'; |
---|
818 | feed.Outlet.P = 5 * 'bar'; |
---|
819 | feed.Outlet.z = 1/NComp; |
---|
820 | |
---|
821 | zero.F = 0 * 'kmol/h'; |
---|
822 | zero.T = 300 * 'K'; |
---|
823 | zero.P = 1 * 'atm'; |
---|
824 | zero.z = 1/NComp; |
---|
825 | zero.v = 0; |
---|
826 | zero.h = 0 * 'J/mol'; |
---|
827 | |
---|
828 | Qr.OutletQ = 4e6 * 'kJ/h'; |
---|
829 | col.pump1.dP = 16 * 'kPa'; |
---|
830 | |
---|
831 | col.dP = 0.024 * 'atm'; #queda de pressao entre o topo e o fundo da coluna |
---|
832 | |
---|
833 | SET |
---|
834 | col.H = 3.5 * 'm'; #altura do recheio |
---|
835 | col.NStages = 8; #numero de estagios teoricos do recheio |
---|
836 | col.stage.Q = 0 * 'kW'; |
---|
837 | col.stage.d = 2.24 * 'ft'; |
---|
838 | col.stage.Cpo = 0.763; |
---|
839 | col.stage.e = 0.951; |
---|
840 | col.stage.a = 112.6 * 'm^2/m^3'; |
---|
841 | |
---|
842 | col.cond.V = 2 * 'm^3'; |
---|
843 | col.cond.Across = 1 * 'm^2'; |
---|
844 | col.reb.V = 2 * 'm^3'; |
---|
845 | col.reb.Across = 1 * 'm^2'; |
---|
846 | |
---|
847 | col.stage.Qsil = 2; #coeficiente de resistencia do recheio |
---|
848 | |
---|
849 | # Controllers type |
---|
850 | TCcond.PID_Select = "Ideal_AW"; |
---|
851 | PC.PID_Select = "Ideal_AW"; |
---|
852 | LCtop.PID_Select = "Ideal_AW"; |
---|
853 | LCbot.PID_Select = "Ideal_AW"; |
---|
854 | |
---|
855 | Qrmax = 5e6 * 'kJ/h'; |
---|
856 | Qrmin = 1e6 * 'kJ/h'; |
---|
857 | Frmin = 0 * 'kmol/h'; |
---|
858 | Frmax = 60 * 'kmol/h'; |
---|
859 | Fcmin = 0 * 'kmol/h'; |
---|
860 | Fcmax = 120 * 'kmol/h'; |
---|
861 | Hmint = 0 * 'm'; |
---|
862 | Hmaxt = 2 * 'm'; |
---|
863 | Hminb = 0 * 'm'; |
---|
864 | Hmaxb = 2 * 'm'; |
---|
865 | Pmin = 0.5 * 'bar'; |
---|
866 | Pmax = 6 * 'bar'; |
---|
867 | Qcmax = -5e5 * 'kJ/h'; |
---|
868 | Qcmin = -5e6 * 'kJ/h'; |
---|
869 | Tmax = (30+273.15) * 'K'; |
---|
870 | Tmin = (-20+273.15) * 'K'; |
---|
871 | |
---|
872 | INITIAL |
---|
873 | # condenser |
---|
874 | col.cond.OutletL.T = 260 *'K'; |
---|
875 | col.cond.Level = 1 * 'm'; |
---|
876 | col.cond.OutletL.z([1:4]) = [0.2, 0.2, 0.4, 0.05]; |
---|
877 | |
---|
878 | # reboiler |
---|
879 | col.reb.OutletL.T = 350 *'K'; |
---|
880 | col.reb.Level = 1 * 'm'; |
---|
881 | col.reb.OutletL.z([1:4]) = [0.1, 0.4, 0.1, 0.3]; |
---|
882 | |
---|
883 | # column trays |
---|
884 | col.stage.OutletL.T = [290:(330-290)/(col.NStages-1):330] * 'K'; |
---|
885 | col.stage.ML = 0.1 * 'kmol'; |
---|
886 | col.stage.OutletL.z([1:4]) = [0.15, 0.3, 0.25, 0.2]; |
---|
887 | |
---|
888 | OPTIONS |
---|
889 | TimeStep = 0.1; |
---|
890 | TimeEnd = 5; |
---|
891 | TimeUnit = 'h'; |
---|
892 | InitialFile = "Packed_Column_ctrl.rlt"; |
---|
893 | #GuessFile = "Packed_Column_ctrl.rlt"; |
---|
894 | #Dynamic = false; |
---|
895 | end |
---|