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 | * Model of costs for a reboiler |
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17 | *-------------------------------------------------------------------- |
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18 | * |
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19 | * Streams: |
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20 | * * a liquid inlet stream |
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21 | * * a liquid outlet stream |
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22 | * * a vapour outlet stream |
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23 | * * a feed stream |
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24 | * |
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25 | * Assumptions: |
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26 | * * perfect mixing of both phases |
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27 | * * thermodynamics equilibrium |
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28 | * * no liquid entrainment in the vapour stream |
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29 | * |
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30 | * Specify: |
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31 | * * the Feed stream |
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32 | * * the Liquid inlet stream |
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33 | * * the outlet flows: OutletV.F and OutletL.F |
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34 | * |
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35 | * Initial: |
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36 | * * the reboiler temperature (OutletL.T) |
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37 | * * the reboiler liquid level (Ll) |
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38 | * * (NoComps - 1) OutletL (OR OutletV) compositions |
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39 | * |
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40 | * - This Model is valid if 14m^2 < Across < 1100 m^2 |
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41 | * |
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42 | *---------------------------------------------------------------------- |
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43 | * Author: Núbia do Carmo Ferreira |
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44 | * $Id: reboiler.mso 210 2007-03-15 12:52:28Z arge $ |
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45 | *--------------------------------------------------------------------*# |
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46 | |
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47 | using "stage_separators/reboiler"; |
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48 | |
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49 | Model reboiler_cost as reboiler |
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50 | ATTRIBUTES |
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51 | Pallete = true; |
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52 | Icon = "icon/Reboiler"; |
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53 | |
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54 | PARAMETERS |
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55 | Material as Switcher (Valid = ["Stainless steel 316", "Stainless steel 304", "Stainless steel 347", "Nickel 200", "Monel 400", "Inconel 600", "Incoloy 825", "Titanium", "Hastelloy"], |
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56 | Default = "Stainless steel 316"); |
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57 | Cost(8,3) as Real; |
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58 | |
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59 | VARIABLES |
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60 | Ce as currency (Brief="Capital Cost"); |
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61 | Cb as currency (Brief="Basic Cost"); |
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62 | Fd as positive (Brief="Cost Factor based on the type of the heat exchanger"); |
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63 | Fp as positive (Brief="Cost Factor based on the project pressure"); |
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64 | Fm as positive (Brief="Cost Factor based on the construction material"); |
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65 | P as pressure (Brief="Average pressure"); |
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66 | |
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67 | EQUATIONS |
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68 | "Average pressure" |
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69 | P = 0.5*(InletLiquid.P + OutletLiquid.P); |
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70 | |
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71 | "Capital Cost" |
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72 | Ce = Cb*Fd*Fp*Fm; |
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73 | |
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74 | "Basic Cost" |
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75 | Cb = 'US$'*exp(Cost(1,1) + Cost(1,2)*ln(Across/'m^2') + Cost(1,3)*(ln(Across/'m^2'))^2); |
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76 | |
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77 | "Cost Factor based on the type of the heat exchanger" |
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78 | Fd = exp(Cost(3,1) + Cost(3,2)*ln(Across/'m^2') + Cost(3,3)*ln(Across/'m^2')); |
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79 | |
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80 | if P <= 700 * 'kPa' then |
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81 | "Cost Factor based on the project pressure" # verificar |
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82 | Fp = Cost(5,1) + Cost(5,2)*ln(Across/'m^2'); |
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83 | else if 700 * 'kPa' < P and P < 2100 * 'kPa' then |
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84 | Fp = Cost(5,1) + Cost(5,2)*ln(Across/'m^2'); |
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85 | else if 2100 * 'kPa' < P and P < 4200 * 'kPa' then |
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86 | Fp = Cost(6,1) + Cost(6,2)*ln(Across/'m^2'); |
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87 | else if 4200 * 'kPa' < P and P < 6200 * 'kPa' then |
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88 | Fp = Cost(7,1) + Cost(7,2)*ln(Across/'m^2'); |
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89 | else |
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90 | Fp = Cost(7,1) + Cost(7,2)*ln(Across/'m^2'); # verificar |
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91 | end |
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92 | end |
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93 | end |
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94 | end |
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95 | |
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96 | "Cost Factor based on the construction material" |
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97 | Fm = Cost(8,1) + Cost(8,2)*ln(Across/'m^2'); |
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98 | |
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99 | end |
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