| 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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