source: branches/rate/eml/streams.mso @ 958

Last change on this file since 958 was 501, checked in by Paula Bettio Staudt, 14 years ago

Fixed ticket #81 - TCdeg in source and sink models

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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* Model of basic streams
17*----------------------------------------------------------------------
18* Author: Paula B. Staudt and Rafael de P. Soares
19* $Id: streams.mso 501 2008-04-14 20:06:18Z paula $
20*---------------------------------------------------------------------*#
21
22using "types";
23
24Model stream
25        ATTRIBUTES
26        Pallete = false;
27        Brief = "General Material Stream";
28        Info =
29        "This is the basic building block for the EML models.
30        Every model should have input and output streams derived
31        from this model.";
32       
33        PARAMETERS
34        outer NComp as Integer (Brief = "Number of chemical components", Lower = 1);
35
36        VARIABLES
37        F as flow_mol                   (Brief = "Stream Molar Flow Rate");
38        T as temperature                (Brief = "Stream Temperature");
39        P as pressure                   (Brief = "Stream Pressure");
40        z(NComp) as fraction    (Brief = "Stream Molar Fraction");
41        h as enth_mol                   (Brief = "Stream Enthalpy");
42        v as fraction                   (Brief = "Vapourization fraction");
43end
44
45Model liquid_stream as stream
46        ATTRIBUTES
47        Pallete = false;
48        Brief = "Liquid Material Stream";
49        Info =
50        "Model for liquid material streams.
51        This model should be used only when the phase of the stream
52        is known ''a priori''.";
53
54        PARAMETERS
55        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
56       
57        EQUATIONS
58        "Liquid Enthalpy"
59        h = PP.LiquidEnthalpy(T, P, z);
60        "Liquid stream"
61        v = 0;
62end
63
64Model vapour_stream as stream
65        ATTRIBUTES
66        Pallete = false;
67        Brief = "Vapour Material Stream";
68        Info =
69        "Model for vapour material streams.
70        This model should be used only when the phase of the stream
71        is known ''a priori''.";
72
73        PARAMETERS
74        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
75       
76        EQUATIONS
77        "Vapour Enthalpy"
78        h = PP.VapourEnthalpy(T, P, z);
79        "Vapour stream"
80        v = 1;
81end
82
83Model streamPH as stream
84        ATTRIBUTES
85        Brief = "Stream with built-in flash calculation";
86        Info = "
87        This model should be used when the vaporization fraction
88        is unknown.
89       
90        The built-in flash calculation will determine the stream
91        state as a function of the overall composition '''z''', the
92        pressure '''P''' and the enthalpy '''h'''.
93       
94        Additionally, the liquid composition '''x''' and the vapor
95        composition '''y''' are calculated.     
96        ";
97        Pallete = false;
98       
99        PARAMETERS
100        outer PP as Plugin(Brief = "External Physical Properties", Type="PP");
101       
102        VARIABLES
103        x(NComp) as fraction    (Brief = "Liquid Molar Fraction");
104        y(NComp) as fraction    (Brief = "Vapour Molar Fraction");
105        s as entr_mol                   (Brief = "Stream Entropy");
106
107        EQUATIONS
108        "Flash Calculation"
109        [v, x, y] = PP.FlashPH(P, h, z);
110       
111        "Enthalpy"
112        h = (1-v)*PP.LiquidEnthalpy(T, P, x) +
113                v*PP.VapourEnthalpy(T, P, y);
114       
115        "Entropy"
116        s = (1-v)*PP.LiquidEntropy(T, P, x) +
117                v*PP.VapourEntropy(T, P, y);
118end
119
120Model source
121        ATTRIBUTES
122        Pallete = true;
123        Icon = "icon/Source";
124        Brief = "Material stream source";
125        Info = "
126        This model should be used for boundary streams.
127        Usually these streams are known and come from another process
128        units.
129
130        The user should specify:
131         * Total molar (mass or volumetric) flow
132         * Temperature
133         * Pressure
134         * Molar (mass or volumetric) composition
135       
136        No matter the specification set, the model will calculate some
137        additional properties:
138         * Mass density
139         * Mass flow
140         * Mass compostions
141         * Specific volume
142         * Vapour fraction
143         * Volumetric flow
144         * Liquid and Vapour compositions
145        ";
146
147        PARAMETERS
148        outer PP                        as Plugin               (Brief = "External Physical Properties", Type="PP");
149        outer NComp             as Integer              (Brief = "Number of chemical components", Lower = 1);
150                  M(NComp)      as molweight    (Brief = "Component Mol Weight");
151                  rhoModel              as Switcher             (Brief = "Density model", Valid = ["volume", "correlation"], Default="volume");
152       
153        SET
154
155        M   = PP.MolecularWeight();
156
157        VARIABLES
158        out Outlet                      as stream                       (Brief = "Outlet stream", PosX=1, PosY=0.5256, Symbol="_{out}");
159        x(NComp)                        as fraction                     (Brief = "Liquid Molar Fraction");
160        y(NComp)                        as fraction                     (Brief = "Vapour Molar Fraction");
161        hl                                      as enth_mol                     (Brief = "Liquid Enthalpy");
162        hv                                      as enth_mol                     (Brief = "Vapour Enthalpy");
163        s                                       as entr_mol                     (Brief = "Stream Entropy");
164        sl                                      as entr_mol                     (Brief = "Liquid Entropy");
165        sv                                      as entr_mol                     (Brief = "Vapour Entropy");     
166        zmass(NComp)            as fraction                     (Brief = "Mass Fraction");
167        Mw                                      as molweight            (Brief = "Average Mol Weight");
168        vm                                      as volume_mol           (Brief = "Molar Volume");       
169        rho                                     as dens_mass            (Brief = "Stream Mass Density");
170        rhom                            as dens_mol                     (Brief = "Stream Molar Density");
171        Fw                                      as flow_mass            (Brief = "Stream Mass Flow");
172        Fvol                    as flow_vol         (Brief = "Volumetric Flow");
173        T_Cdeg                          as temperature          (Brief = "Temperature in °C", Lower=-200);
174       
175        EQUATIONS
176        "Flash Calculation"
177        [Outlet.v, x, y] = PP.Flash(Outlet.T, Outlet.P, Outlet.z);
178       
179        "Overall Enthalpy"
180        Outlet.h = (1-Outlet.v)*hl + Outlet.v*hv;
181
182        "Liquid Enthalpy"
183        hl = PP.LiquidEnthalpy(Outlet.T, Outlet.P, x);
184
185        "Vapour Enthalpy"
186        hv = PP.VapourEnthalpy(Outlet.T, Outlet.P, y);
187
188        "Overall Entropy"
189        s = (1-Outlet.v)*sl + Outlet.v*sv;
190
191        "Liquid Entropy"
192        sl = PP.LiquidEntropy(Outlet.T, Outlet.P, x);
193       
194        "Vapour Entropy"
195        sv = PP.VapourEntropy(Outlet.T, Outlet.P, y);
196
197        "Average Molecular Weight"
198        Mw = sum(M*Outlet.z);
199
200        switch rhoModel
201                case "volume":
202        "Molar Density"
203                rhom * vm = 1;
204               
205                case "correlation":
206        "Mass Density"
207                rho*((1-Outlet.v)/PP.LiquidDensity(Outlet.T,Outlet.P,x) + Outlet.v/PP.VapourDensity(Outlet.T,Outlet.P,y)) = 1;
208        end
209       
210        "Mass or Molar Density"
211        rhom * Mw = rho;
212
213        "Flow Mass"
214        Fw      =  Mw*Outlet.F;
215
216        "Molar Volume"
217        vm = (1-Outlet.v)*PP.LiquidVolume(Outlet.T, Outlet.P, x) + Outlet.v*PP.VapourVolume(Outlet.T,Outlet.P,y);
218       
219        "Volumetric Flow"
220        Fvol = Outlet.F*vm ;
221       
222        "Mass Fraction"
223        zmass = M*Outlet.z / Mw;
224       
225        "Temperature in °C"
226        T_Cdeg = Outlet.T - 273.15 * 'K';
227       
228end
229
230Model simple_source
231        ATTRIBUTES
232        Pallete = true;
233        Icon = "icon/Source";
234        Brief = "Simple material stream source";
235        Info = "
236        This model should be used for boundary streams.
237        Usually these streams are known and come from another process
238        units.
239
240        The user should specify:
241         * Total molar flow
242         * Temperature
243         * Pressure
244         * Molar composition
245        ";
246
247        PARAMETERS
248        outer PP                        as Plugin               (Brief = "External Physical Properties", Type="PP");
249        outer NComp             as Integer              (Brief = "Number of chemical components", Lower = 1);
250       
251        VARIABLES
252        out Outlet                      as stream               (Brief = "Outlet stream", PosX=1, PosY=0.5256, Symbol="_{out}");
253        x(NComp)                        as fraction             (Brief = "Liquid Molar Fraction");
254        y(NComp)                        as fraction             (Brief = "Vapour Molar Fraction");
255        hl                                      as enth_mol             (Brief = "Liquid Enthalpy");
256        hv                                      as enth_mol             (Brief = "Vapour Enthalpy");
257        s                                       as entr_mol             (Brief = "Stream Entropy");
258        sl                                      as entr_mol             (Brief = "Liquid Entropy");
259        sv                                      as entr_mol             (Brief = "Vapour Entropy");     
260
261        EQUATIONS
262        "Flash Calculation"
263        [Outlet.v, x, y] = PP.Flash(Outlet.T, Outlet.P, Outlet.z);
264       
265        "Overall Enthalpy"
266        Outlet.h = (1-Outlet.v)*hl + Outlet.v*hv;
267
268        "Liquid Enthalpy"
269        hl = PP.LiquidEnthalpy(Outlet.T, Outlet.P, x);
270
271        "Vapour Enthalpy"
272        hv = PP.VapourEnthalpy(Outlet.T, Outlet.P, y);
273       
274        "Overall Entropy"
275        s = (1-Outlet.v)*sl + Outlet.v*sv;
276
277        "Liquid Entropy"
278        sl = PP.LiquidEntropy(Outlet.T, Outlet.P, x);
279       
280        "Vapour Entropy"
281        sv = PP.VapourEntropy(Outlet.T, Outlet.P, y);
282end
283
284Model sink
285        ATTRIBUTES
286        Pallete = true;
287        Icon = "icon/Sink";
288        Brief = "Material stream sink";
289        Info = "
290        This model should be used for boundary streams when additional
291        information about the stream is desired.
292
293        Some of the additional informations calculated by this models are:
294         * Mass density
295         * Mass flow
296         * Mass compostions
297         * Specific volume
298         * Vapour fraction
299         * Volumetric flow
300         * Liquid and Vapour compositions
301        ";
302
303        PARAMETERS
304        outer PP                        as Plugin               (Brief = "External Physical Properties", Type="PP");
305        outer NComp             as Integer              (Brief = "Number of chemical components", Lower = 1);
306                  M(NComp)      as molweight    (Brief = "Component Mol Weight");
307                  rhoModel              as Switcher             (Brief = "Density model", Valid = ["volume", "correlation"], Default="volume");
308       
309        SET
310
311        M   = PP.MolecularWeight();
312       
313        VARIABLES
314        in Inlet                as stream               (Brief = "Inlet Stream", PosX=0, PosY=0.5308, Symbol="_{in}");
315        v                               as fraction             (Brief = "Vapourization fraction");
316        x(NComp)                as fraction             (Brief = "Liquid Molar Fraction");
317        y(NComp)                as fraction             (Brief = "Vapour Molar Fraction");
318        zmass(NComp)    as fraction             (Brief = "Mass Fraction");
319        Mw                              as molweight    (Brief = "Average Mol Weight");
320        vm                              as volume_mol   (Brief = "Molar Volume");       
321        rho                             as dens_mass    (Brief = "Stream Mass Density");
322        rhom                    as dens_mol             (Brief = "Stream Molar Density");
323        Fw                              as flow_mass    (Brief = "Stream Mass Flow");
324        Fvol            as flow_vol     (Brief = "Volumetric Flow");
325        s                               as entr_mol             (Brief = "Stream Entropy");
326        T_Cdeg                  as temperature  (Brief = "Temperature in °C", Lower=-200);
327
328        EQUATIONS
329        "Flash Calculation"
330        [v, x, y] = PP.FlashPH(Inlet.P, Inlet.h, Inlet.z);
331       
332        "Average Molecular Weight"
333        Mw = sum(M*Inlet.z);
334
335        switch rhoModel
336                case "volume":
337        "Molar Density"
338                rhom * vm = 1;
339               
340                case "correlation":
341        "Mass Density"
342                rho * ((1-v)/PP.LiquidDensity(Inlet.T,Inlet.P,x) + v/PP.VapourDensity(Inlet.T,Inlet.P,y)) = 1;
343        end
344       
345        "Mass or Molar Density"
346        rhom * Mw = rho;
347
348        "Flow Mass"
349        Fw      =  Mw*Inlet.F;
350
351        "Molar Volume"
352        vm = (1-v)*PP.LiquidVolume(Inlet.T, Inlet.P, x) + v*PP.VapourVolume(Inlet.T,Inlet.P,y);
353       
354        "Volumetric Flow"
355        Fvol = Inlet.F*vm ;
356       
357        "Mass Fraction"
358        zmass = M*Inlet.z / Mw;
359       
360        "Overall Entropy"
361        s = (1-v)*PP.LiquidEntropy(Inlet.T, Inlet.P, x) +
362                v*PP.VapourEntropy(Inlet.T, Inlet.P, y);
363       
364        "Temperature in °C"
365        T_Cdeg = Inlet.T - 273.15 * 'K';
366
367end
368
369Model simple_sink
370        ATTRIBUTES
371        Pallete = true;
372        Icon = "icon/Sink";
373        Brief = "Simple material stream sink";
374        Info = "
375        This model should be used for boundary streams when no additional
376        information about the stream is desired.
377        ";
378       
379        VARIABLES
380        in Inlet                as stream       (Brief = "Inlet Stream", PosX=0, PosY=0.5308, Symbol="_{in}");
381end
382
383Model energy_stream
384        ATTRIBUTES
385        Pallete = false;
386        Brief = "General Energy Stream";
387        Info =
388        "This is the basic building block for the EML models.
389        Every model should have input and output energy streams
390        derived from this model.";
391
392        VARIABLES
393        Q as heat_rate(Brief="Energy rate");
394end
395
396Model energy_source
397        ATTRIBUTES
398        Pallete = true;
399        Icon = "icon/energy_source";
400        Brief = "Enegry stream source";
401
402        VARIABLES
403        out OutletQ             as energy_stream (Brief = "Outlet energy stream", PosX=1, PosY=0.5349, Symbol="_{out}");
404end
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