1 | #*------------------------------------------------------------------- |
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2 | * EMSO Model Library (EML) Copyright (C) 2004 - 2007 ALSOC. |
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3 | * |
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4 | * This LIBRARY is free software; you can distribute it and/or modify |
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5 | * it under the therms of the ALSOC FREE LICENSE as available at |
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6 | * http://www.enq.ufrgs.br/alsoc. |
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7 | * |
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8 | * EMSO Copyright (C) 2004 - 2007 ALSOC, original code |
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9 | * from http://www.rps.eng.br Copyright (C) 2002-2004. |
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10 | * All rights reserved. |
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11 | * |
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12 | * EMSO is distributed under the therms of the ALSOC LICENSE as |
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13 | * available at http://www.enq.ufrgs.br/alsoc. |
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14 | * |
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15 | *---------------------------------------------------------------------- |
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16 | * Author: Rafael de Pelegrini Soares |
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17 | * $Id: sample_cstr_simple.mso 176 2007-03-04 04:56:54Z arge $ |
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18 | *---------------------------------------------------------------------*# |
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19 | |
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20 | using "reactors/cstr"; |
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21 | |
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22 | FlowSheet CSTR |
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23 | |
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24 | PARAMETERS |
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25 | Fin as flow_vol; |
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26 | Fout as flow_vol; |
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27 | CA0 as conc_mol; |
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28 | CB0 as conc_mol; |
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29 | FA0 as flow_mol; |
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30 | FB0 as flow_mol; |
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31 | # Troca térmica |
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32 | Tw as temperature; |
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33 | U as heat_trans_coeff; |
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34 | A as area; |
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35 | # Reação |
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36 | k0 as frequency; |
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37 | Ea as energy_mol (Brief = "Energia de Ativação"); |
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38 | R as entr_mol; |
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39 | |
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40 | VARIABLES |
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41 | q as heat_rate; |
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42 | HR as energy_mol; |
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43 | T as temperature; |
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44 | k as frequency; |
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45 | CA as conc_mol; |
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46 | CB as conc_mol; |
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47 | V as volume; |
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48 | rA as reaction_mol; |
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49 | rB as reaction_mol; |
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50 | Cps as cp_mol; # (Unit='cal/mol/K'); |
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51 | T0 as temperature; |
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52 | |
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53 | EQUATIONS |
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54 | |
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55 | "Troca térmica" |
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56 | q=U*A*(T-Tw); #j/s |
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57 | |
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58 | "Constante de Reação" |
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59 | k=k0*exp(Ea/R*(1/(436.15*'K') - 1/T)); |
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60 | |
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61 | "Taxas de Reação" |
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62 | rA=-k*CA; # (mol/m^3/h) >> reação de primeira ordem << |
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63 | rB=-rA; |
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64 | |
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65 | "Calor de Reação" |
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66 | HR=-(80*250)*'cal/mol'; |
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67 | |
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68 | "Cp da mistura" |
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69 | Cps=(0.5*250)*3*'J/mol/K'; |
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70 | |
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71 | "Balanço de Energia" |
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72 | diff(T)=((U*A*(Tw-T)-FA0*Cps*(T-T0)+HR*rA*V)/(CA0*V*Cps)); |
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73 | |
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74 | "Bal. Material Global" |
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75 | diff(V)=Fin-Fout; |
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76 | |
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77 | "Bal. Material A" |
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78 | diff(V*CA)=(FA0-Fout*CA+V*rA); |
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79 | |
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80 | "Bal. Material B" |
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81 | diff(V*CB)=(FB0-Fout*CB+V*rB); |
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82 | |
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83 | "Temperatura da corrente de alimentação" |
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84 | T0= (40 + 273.15 + time*200/1000/'s') * 'K'; |
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85 | |
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86 | SET |
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87 | Fin = 0.125997903*'m^3/h'; |
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88 | Fout = 0.125997903*'m^3/h'; |
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89 | CA0=9.3652352*'mol/m^3'; |
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90 | CB0=0*'mol/m^3'; |
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91 | FA0 = Fin*CA0; |
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92 | FB0 = Fin*CB0; |
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93 | Tw = (140+273)*'K'; |
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94 | k0=0.8*'1/h'; #constante para T=436.15 K |
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95 | Ea=28960*'cal/mol'; |
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96 | R=1.98*'cal/mol/K'; |
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97 | U = 0 *'cal/m^2/K/s';#isolado |
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98 | A = 1*'m^2'; |
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99 | |
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100 | INITIAL |
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101 | T = (140 + 273) * 'K'; |
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102 | V = 0.9*6*'m^3'; |
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103 | CA = 2*'mol/m^3'; |
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104 | CB = 6*'mol/m^3'; |
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105 | |
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106 | OPTIONS |
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107 | TimeStep = 10; |
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108 | TimeEnd = 1200; |
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109 | end |
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