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 | * Plant of n-Tanks |
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17 | *---------------------------------------------------------------------- |
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18 | * |
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19 | * Description: |
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20 | * Plant of n-tanks |
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21 | * |
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22 | * Devices: |
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23 | * * inlet and outlet feeds |
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24 | * * mixer |
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25 | * * splitter |
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26 | * * tank |
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27 | * |
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28 | *---------------------------------------------------------------------- |
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29 | * Author: Rodolfo Rodrigues |
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30 | *--------------------------------------------------------------------*# |
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31 | |
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32 | using "types"; |
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33 | |
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34 | |
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35 | Model vol_tank |
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36 | ATTRIBUTES |
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37 | Pallete = false; |
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38 | Brief = "Routine to calculate tank volume"; |
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39 | Info = " |
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40 | Based in 2 geometry and 2 configurations/orientations |
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41 | |
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42 | == Geometry == |
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43 | * Flat (no head) (default) |
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44 | * Spherical |
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45 | |
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46 | == Orientation == |
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47 | * Vertical (default) |
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48 | * Horizontal |
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49 | "; |
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50 | |
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51 | PARAMETERS |
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52 | pi as positive (Brief="Pi value", Default=3.141593, Symbol="\pi"); |
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53 | Geometry as Switcher (Brief="Tank head type", Valid=["flat","spherical"], Default="flat"); |
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54 | Orientation as Switcher(Brief="Tank orientation", Valid=["vertical","horizontal"], Default="vertical"); |
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55 | |
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56 | VARIABLES |
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57 | V as volume (Brief="Level tank volume"); |
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58 | Vt as volume (Brief="Tank volume"); |
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59 | L as length (Brief="Tank length"); |
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60 | Level as length (Brief="Tank level"); |
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61 | D as length (Brief="Tank diameter"); |
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62 | Across as area (Brief="Tank cross section area"); |
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63 | |
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64 | EQUATIONS |
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65 | "Content volume" |
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66 | V = Across*Level; |
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67 | |
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68 | switch Orientation |
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69 | case "vertical": |
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70 | switch Geometry |
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71 | case "flat": |
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72 | "Tank volume" |
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73 | Vt = pi/4*(D^2)*L; |
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74 | "Level tank volume" |
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75 | V = pi/4*(D^2)*Level; |
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76 | |
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77 | case "spherical": |
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78 | "Tank volume" |
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79 | Vt = pi/6*D^3; |
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80 | "Level tank volume" |
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81 | V = pi/3*Level^2*(3*D/2 - Level); |
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82 | end |
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83 | case "horizontal": |
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84 | switch Geometry |
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85 | case "flat": |
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86 | "Tank volume" |
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87 | Vt = pi/4*(D^2)*L; |
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88 | "Level tank volume" |
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89 | V = ((D^2)*acos((D - 2*Level)/D)/4/'rad' - |
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90 | (D - 2*Level)*sqrt(D*Level - Level^2)/2)*L; |
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91 | |
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92 | case "spherical": |
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93 | "Tank volume" |
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94 | Vt = pi/6*D^3; |
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95 | "Level tank volume" |
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96 | V = pi/3*Level^2*(3*D/2 - Level); |
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97 | end |
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98 | end |
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99 | end |
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100 | |
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101 | |
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102 | #*--------------------------------------------------------------------- |
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103 | * Simple feed model |
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104 | *--------------------------------------------------------------------*# |
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105 | Model stream |
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106 | ATTRIBUTES |
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107 | Brief = "Simple stream model"; |
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108 | |
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109 | VARIABLES |
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110 | F as flow_vol (Brief="Volumetric flow", DisplayUnit='cm^3/s'); |
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111 | end |
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112 | |
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113 | Model feed_inlet |
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114 | ATTRIBUTES |
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115 | Pallete = true; |
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116 | Brief = "Simple inlet stream"; |
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117 | Icon = "icon/inlet"; |
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118 | |
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119 | VARIABLES |
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120 | out Outlet as stream (Brief="Outlet stream", PosX=0.5, PosY=0, Symbol="_{out}"); |
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121 | end |
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122 | |
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123 | Model feed_outlet |
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124 | ATTRIBUTES |
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125 | Pallete = true; |
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126 | Brief = "Simple outlet stream"; |
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127 | Icon = "icon/outlet"; |
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128 | |
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129 | VARIABLES |
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130 | in Inlet as stream (Brief="Inlet stream", PosX=0.5, PosY=0, Symbol="_{in}"); |
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131 | end |
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132 | |
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133 | |
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134 | #*--------------------------------------------------------------------- |
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135 | * Simple splitter model |
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136 | *--------------------------------------------------------------------*# |
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137 | Model simple_splitter |
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138 | ATTRIBUTES |
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139 | Pallete = true; |
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140 | Icon = "icon/connection"; |
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141 | Brief = "Simple model of a splitter with 2 outlet streams."; |
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142 | |
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143 | VARIABLES |
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144 | in Inlet as stream (Brief="Inlet stream", PosX=0.5, PosY=1, Symbol="_{in}"); |
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145 | out Outlet1 as stream (Brief="Outlet stream 1", PosX=1, PosY=0.5, Symbol="_{out,1}"); |
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146 | out Outlet2 as stream (Brief="Outlet stream 2", PosX=0.5, PosY=0, Symbol="_{out,2}"); |
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147 | X as fraction (Brief="Fraction to Outlet 1"); |
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148 | |
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149 | EQUATIONS |
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150 | "Material balance" |
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151 | Outlet1.F + Outlet2.F = Inlet.F; |
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152 | |
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153 | "Outlet stream 1" |
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154 | Outlet1.F = Inlet.F*X; |
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155 | end |
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156 | |
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157 | |
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158 | #*--------------------------------------------------------------------- |
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159 | * Simple mixer model |
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160 | *--------------------------------------------------------------------*# |
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161 | Model simple_mixer |
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162 | ATTRIBUTES |
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163 | Pallete = true; |
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164 | Icon = "icon/connection"; |
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165 | Brief = "Simple model of a mixer with 2 inlet streams."; |
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166 | |
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167 | VARIABLES |
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168 | in Inlet1 as stream (Brief="Inlet stream 1", PosX=0, PosY=0.5, Symbol="_{in,1}"); |
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169 | in Inlet2 as stream (Brief="Inlet stream 2", PosX=0.5, PosY=0, Symbol="_{in,2}"); |
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170 | out Outlet as stream (Brief="Outlet stream", PosX=0.5, PosY=1, Symbol="_{out}"); |
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171 | |
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172 | EQUATIONS |
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173 | "Material balance" |
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174 | Outlet.F = Inlet1.F + Inlet1.F; |
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175 | end |
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176 | |
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177 | |
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178 | #*--------------------------------------------------------------------- |
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179 | * Simple tank model |
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180 | *--------------------------------------------------------------------*# |
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181 | Model simple_tank |
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182 | ATTRIBUTES |
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183 | Pallete = true; |
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184 | Icon = "icon/tank"; |
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185 | Brief = "Simple model of a tank."; |
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186 | |
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187 | PARAMETERS |
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188 | g as acceleration(Brief="Acceleration of gravity", Default=9.80665); |
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189 | |
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190 | VARIABLES |
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191 | in Inlet as stream (Brief="Inlet stream", PosX=0.5, PosY=0, Symbol="_{in}"); |
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192 | out Outlet as stream (Brief="Outlet stream", PosX=0.5, PosY=1, Symbol="_{out}"); |
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193 | |
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194 | tank as vol_tank (Brief="Tank volume routine calculation", Symbol="_{tank}"); |
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195 | K as Real (Brief="Discharge constant", Unit='cm^2.5/s'); |
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196 | a as area (Brief="Cross-section of outlet hole", DisplayUnit='cm^2'); |
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197 | |
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198 | EQUATIONS |
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199 | "Material balance" |
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200 | diff(tank.V) = Inlet.F - Outlet.F; |
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201 | |
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202 | "Outlet flow" |
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203 | Outlet.F = K*sqrt(tank.Level); |
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204 | |
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205 | "Discharge constant" |
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206 | K = a*sqrt(2*g); |
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207 | end |
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