| 124 | TrayDiameter as length (Brief="Tray Diameter",Default=1.600); |
| 125 | TraySpacing as length (Brief="Tray Spacing",Default=0.600); |
| 126 | Fraction_HoleArea as fraction (Brief="Fraction of the active area that is occupied by the holes with respect to the total tray area",Default=0.10); |
| 127 | Fraction_DowncomerArea as fraction (Brief="Fraction of the downcomer area with respect to the total tray area",Default=0.20); |
| 128 | WeirLength as length (Brief="Weir length"); |
| 129 | WeirHeight as length (Brief="Weir height"); |
| 130 | TrayLiquidPasses as Real (Brief="Number of liquid passes in the tray", Default=1); |
| 131 | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
| 132 | beta as fraction (Brief="Aeration fraction"); |
| 133 | alfa as fraction (Brief="Dry pressure drop coefficient"); |
| 134 | |
| 135 | PlateArea as area (Brief="Plate area = Atray - Adowncomer",Protected=false); |
| 136 | TrayVolume as volume (Brief="Total Volume of the tray",Protected=false); |
| 137 | HolesArea as area (Brief="Total holes area",Protected=false); |
| 138 | |
| 139 | FeeheryCoeff as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true); |
| 140 | ElgueCoeff as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true); |
| 141 | OlsenCoeff as Real (Brief="Olsens correlation coefficient", Default=1,Hidden=true); |
| 142 | |
| 143 | |
| 144 | VapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
| 145 | LiquidFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
| 146 | |
| 147 | SET |
| 148 | VapSideTrayIndex(VapourSideStreamLocation) =1; |
| 149 | LiqSideTrayIndex(LiquidSideStreamLocation) =1; |
| 150 | Mw = PP.MolecularWeight(); |
| 151 | |
| 152 | |
| 153 | PlateArea = 0.25*Pi*(TrayDiameter^2)*Fraction_DowncomerArea; |
| 154 | TrayVolume = 0.25*Pi*(TrayDiameter^2)*TraySpacing; |
| 155 | HolesArea = 0.25*Pi*(TrayDiameter^2)*Fraction_HoleArea; |
| 156 | |
| 157 | VARIABLES |
| 158 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 159 | # Tray Initialization For the Whole Column Section |
| 160 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 161 | INITIALIZATION as InitializeSection (Brief = "Column Model Initialization"); |
| 162 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 163 | # Control Ports |
| 164 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 165 | CONTROL as ControlSection (Brief = "Control"); |
| 166 | out TCI as control_signal (Brief="Temperature Indicator", Protected = true, PosX=1, PosY=0.73); |
| 167 | out PCI as control_signal (Brief="Pressure Indicator", Protected = true, PosX=0, PosY=0.24); |
| 168 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 169 | # Column Feed - Side Stream Flow and Murphree Efficiency |
| 170 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 171 | in LiquidInlet as stream (Brief="Liquid Inlet in the section", PosX=0.70, PosY=0); |
| 172 | out VapourOutlet as vapour_stream (Brief="Vapour Outlet in the section", PosX=0.30, PosY=0); |
| 173 | |
| 174 | out VapourDrawOff as vapour_stream (Brief="Vapour Draw Off Port in the section", PosX=1, PosY=0.35,Protected = true); |
| 175 | out LiquidDrawOff as liquid_stream (Brief="Liquid Draw Off Port in the section", PosX=1, PosY=0.65,Protected = true); |
| 176 | |
| 177 | TRAYS(NumberOfTrays) as tray (Brief="Number of trays in the Column Section"); |
| 178 | VapourDrawOffFlow as flow_mol (Brief="Vapour Draw Off Stream Molar Flow Rate"); |
| 179 | LiquidDrawOffFlow as flow_mol (Brief="Vapour Draw Off Stream Molar Flow Rate"); |
| 180 | MurphreeEff as Real (Brief="Murphree efficiency for All Trays",Lower=0.01,Upper=1); |
| 181 | |
| 182 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 183 | # Section Inlet Vapour and Outlet Liquid Material Ports |
| 184 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 185 | in VapourInlet as stream (Brief="Vapour Inlet in the section", PosX=0.30, PosY=1); |
| 186 | out LiquidOutlet as liquid_stream (Brief="Liquid Outlet in the section", PosX=0.70, PosY=1); |
| 187 | |
| 188 | LiquidConnector as stream (Brief="Liquid connection in the middle TRAYS", PosX=0.75, PosY=1,Hidden=true); |
| 189 | VapourConnector as stream (Brief="Vapour connection in the middle TRAYS", PosX=0.55, PosY=0,Hidden=true); |
| 190 | CONNECTIONS |
| 191 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 192 | # Connecting Intermediate Trays |
| 193 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 194 | TRAYS([2:NumberOfTrays]).OutletVapour to TRAYS([1:NumberOfTrays-1]).InletVapour; |
| 195 | TRAYS([1:NumberOfTrays-1]).OutletLiquid to TRAYS([2:NumberOfTrays]).InletLiquid; |
| 196 | |
| 197 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 198 | # Connecting Connectors |
| 199 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 200 | LiquidConnector to TRAYS(1).InletLiquid; |
| 201 | VapourConnector to TRAYS(NumberOfTrays).InletVapour; |
| 202 | |
| 203 | INITIAL |
| 204 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 205 | # Tray Initialization |
| 206 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 207 | for i in 1:NumberOfTrays do |
| 208 | |
| 209 | "The initial temperature of the TRAYS" |
| 210 | TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1)); |
| 211 | |
| 212 | "The initial Level of the TRAYS" |
| 213 | TRAYS(i).Level = INITIALIZATION.LevelFraction*WeirHeight; |
| 214 | end |
| 215 | |
| 216 | for i in 1:NComp-1 do |
| 217 | |
| 218 | for j in 1:NumberOfTrays do |
| 219 | |
| 220 | "The initial composition of the TRAYS - Normalized" |
| 221 | TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1)); |
| 222 | end |
| 223 | |
| 224 | end |
| 225 | |
| 226 | EQUATIONS |
| 227 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 228 | # Control Ports |
| 229 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 230 | |
| 231 | "Tray Temperature Indicator" |
| 232 | #TCI*'K' = TRAYS(min([NumberOfTrays, CONTROL.Tindicator_TrayNumber])).OutletVapour.T; |
| 233 | TCI*'K' = TRAYS(CONTROL.Tindicator_TrayNumber).OutletVapour.T; |
| 234 | |
| 235 | "Tray Pressure Indicator" |
| 236 | #PCI*'atm' = TRAYS(min([NumberOfTrays, CONTROL.Pindicator_TrayNumber])).OutletVapour.P; |
| 237 | PCI*'atm' = TRAYS(CONTROL.Pindicator_TrayNumber).OutletVapour.P; |
| 238 | |
| 239 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 240 | # Trays Equations |
| 241 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 242 | |
| 243 | for i in [1:NumberOfTrays] do |
| 244 | |
| 245 | "Murphree Efficiency" |
| 246 | TRAYS(i).OutletVapour.z = MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z; |
| 247 | |
| 248 | "Level of clear liquid over the weir" |
| 249 | TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/PlateArea; |
| 250 | |
| 251 | "Geometry Constraint" |
| 252 | TrayVolume = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV; |
| 253 | |
| 254 | "Energy Holdup" |
| 255 | TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*TrayVolume; |
| 256 | |
| 257 | "Energy Balance" |
| 258 | diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h |
| 259 | -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + HeatSupply ); |
| 260 | |
| 261 | switch LiquidFlow |
| 262 | case "on": |
| 263 | switch LiquidFlowModel |
| 264 | case "default": |
| 265 | "Francis Equation" |
| 266 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*WeirLength*((TRAYS(i).Level-(beta*WeirHeight))/(beta))^2; |
| 267 | |
| 268 | case "Wang_Fl": |
| 269 | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'m^0.5/s'*WeirLength*((TRAYS(i).Level-(beta*WeirHeight))/(beta))^1.5; |
| 270 | |
| 271 | case "Olsen": |
| 272 | TRAYS(i).OutletLiquid.F / 'mol/s'= WeirLength*TrayLiquidPasses*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletVapour.z)/(0.665*OlsenCoeff)^1.5 * ((TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/TRAYS(i).rhoL/PlateArea)-WeirHeight)^1.5 * 'm^0.5/mol'; |
| 273 | |
| 274 | case "Feehery_Fl": |
| 275 | TRAYS(i).OutletLiquid.F = WeirLength*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z) * ((TRAYS(i).Level-WeirHeight)/750/'mm')^1.5 * 'm^2/s'; |
| 276 | |
| 277 | case "Roffel_Fl": |
| 278 | TRAYS(i).OutletLiquid.F = 2/3*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z)*WeirLength*(TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/(PlateArea*1.3)/TRAYS(i).rhoL)^1.5*sqrt(2*g/ |
| 279 | (2*(1 - 0.3593/'Pa^0.0888545'*abs(TRAYS(i).OutletVapour.F*sum(Mw*TRAYS(i).OutletVapour.z)/(PlateArea*1.3)/sqrt(TRAYS(i).rhoV))^0.177709)-1)); #/'(kg/m)^0.0888545/s^0.177709'; |
| 280 | end |
| 281 | when TRAYS(i).Level < (beta *WeirHeight) switchto "off"; |
| 282 | |
| 283 | case "off": |
| 284 | "Low level" |
| 285 | TRAYS(i).OutletLiquid.F = 0 * 'mol/h'; |
| 286 | when TRAYS(i).Level > (beta * WeirHeight) + 1e-6*'m' switchto "on"; |
| 287 | end |
| 288 | |
| 289 | switch VapourFlow |
| 290 | case "on": |
| 291 | switch VapourFlowModel |
| 292 | case "Reepmeyer": |
| 293 | TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/(TRAYS(i).rhoV*alfa))*HolesArea; |
| 294 | |
| 295 | case "Feehery_Fv": |
| 296 | TRAYS(i).InletVapour.F = TRAYS(i).rhoV/PlateArea/FeeheryCoeff/sum(Mw*TRAYS(i).OutletVapour.z) * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-(TRAYS(i).rhoV*g*TRAYS(i).ML*TRAYS(i).vL/PlateArea))/TRAYS(i).rhoV); |
| 297 | |
| 298 | case "Roffel_Fv": |
| 299 | TRAYS(i).InletVapour.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)*1e5 - (beta*sum(TRAYS(i).M*Mw)/(PlateArea*1.3)*g*1e5) * (TRAYS(i).rhoV*HolesArea/sum(Mw*TRAYS(i).OutletVapour.z))^1.08 * 'm^1.08/mol^1.08'; |
| 300 | |
| 301 | case "Klingberg": |
| 302 | TRAYS(i).InletVapour.F * TRAYS(i).vV = PlateArea * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV); |
| 303 | |
| 304 | case "Wang_Fv": |
| 305 | TRAYS(i).InletVapour.F * TRAYS(i).vV = PlateArea * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV*alfa); |
| 306 | |
| 307 | case "Elgue": |
| 308 | TRAYS(i).InletVapour.F = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/ElgueCoeff); |
| 309 | end |
| 310 | when TRAYS(i).InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
| 311 | |
| 312 | case "off": |
| 313 | TRAYS(i).InletVapour.F = 0 * 'mol/s'; |
| 314 | when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL + 1e-1 * 'atm' switchto "on"; |
| 315 | end |
| 316 | |
| 317 | end |
| 318 | |
| 319 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 320 | # Equating Inlet Liquid Connector Variables |
| 321 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 322 | "Liquid Inlet Flow" |
| 323 | LiquidConnector.F = LiquidInlet.F; |
| 324 | |
| 325 | "Liquid Inlet Temperature" |
| 326 | LiquidConnector.T = LiquidInlet.T; |
| 327 | |
| 328 | "Liquid Inlet Pressure" |
| 329 | LiquidConnector.P = LiquidInlet.P; |
| 330 | |
| 331 | "Liquid Inlet Composition" |
| 332 | LiquidConnector.z = LiquidInlet.z; |
| 333 | |
| 334 | "Liquid Inlet Vapour Fraction" |
| 335 | LiquidConnector.v = LiquidInlet.v; |
| 336 | |
| 337 | "Liquid Inlet Enthalpy" |
| 338 | LiquidConnector.h = LiquidInlet.h; |
| 339 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 340 | # Equating Inlet Vapour Connector Variables |
| 341 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 342 | "Vapour Inlet Flow" |
| 343 | VapourConnector.F = VapourInlet.F; |
| 344 | |
| 345 | "Vapour Inlet Temperature" |
| 346 | VapourConnector.T = VapourInlet.T; |
| 347 | |
| 348 | "Vapour Inlet Pressure" |
| 349 | VapourConnector.P = VapourInlet.P; |
| 350 | |
| 351 | "Vapour Inlet Composition" |
| 352 | VapourConnector.z = VapourInlet.z; |
| 353 | |
| 354 | "Vapour Inlet Vapour Fraction" |
| 355 | VapourConnector.v = VapourInlet.v; |
| 356 | |
| 357 | "Vapour Inlet Enthalpy" |
| 358 | VapourConnector.h = VapourInlet.h; |
| 359 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 360 | # Equating Outlet Liquid Variables |
| 361 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 362 | "Liquid Outlet Flow" |
| 363 | LiquidOutlet.F = TRAYS(NumberOfTrays).OutletLiquid.F; |
| 364 | |
| 365 | "Liquid Outlet Temperature" |
| 366 | LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T; |
| 367 | |
| 368 | "Liquid Outlet Pressure" |
| 369 | LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P; |
| 370 | |
| 371 | "Liquid Outlet Composition" |
| 372 | LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z; |
| 373 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 374 | # Equating Outlet Vapour Variables |
| 375 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 376 | "Vapour Outlet Flow" |
| 377 | VapourOutlet.F = TRAYS(1).OutletVapour.F; |
| 378 | |
| 379 | "Vapour Outlet Temperature" |
| 380 | VapourOutlet.T = TRAYS(1).OutletVapour.T; |
| 381 | |
| 382 | "Vapour Outlet Pressure" |
| 383 | VapourOutlet.P = TRAYS(1).OutletVapour.P; |
| 384 | |
| 385 | "Vapour Outlet Composition" |
| 386 | VapourOutlet.z = TRAYS(1).OutletVapour.z; |
| 387 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 388 | # Equating Outlet Vapour Side Stream Variables |
| 389 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 390 | "Vapour Draw Off Stream - Flow" |
| 391 | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
| 392 | |
| 393 | "Vapour Draw Off Stream - Temperature" |
| 394 | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
| 395 | |
| 396 | "Vapour Draw Off Stream - Pressure" |
| 397 | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
| 398 | |
| 399 | "Vapour Draw Off Stream - Composition" |
| 400 | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
| 401 | |
| 402 | "Vapour Draw Off Stream" |
| 403 | VapourDrawOffFlow = VapourDrawOff.F; |
| 404 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 405 | # Equating Outlet Liquid Side Stream Variables |
| 406 | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 407 | "Liquid Draw Off Stream - Flow" |
| 408 | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
| 409 | |
| 410 | "Liquid Draw Off Stream - Temperature" |
| 411 | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
| 412 | |
| 413 | "Liquid Draw Off Stream - Pressure" |
| 414 | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
| 415 | |
| 416 | "Liquid Draw Off Stream - Composition" |
| 417 | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
| 418 | |
| 419 | "Liquid Draw Off Stream" |
| 420 | LiquidDrawOffFlow = LiquidDrawOff.F; |
| 421 | |
| 422 | end |
| 423 | |
| 424 | Model Section_Column as SectionColumnBasic |
| 425 | |
| 426 | ATTRIBUTES |
| 427 | Pallete = true; |
| 428 | Icon = "icon/SectionColumn"; |
| 429 | Brief = "Model of a column section."; |
| 430 | Info = |
| 431 | "== Model of a column section containing == |
| 432 | * NumberOfTrays TRAYS. |
| 433 | * One Feed Inlet. |
| 434 | |
| 435 | == Specify == |
| 436 | * the feed stream of each tray (Inlet); |
| 437 | * the Murphree eficiency for each tray Emv; |
| 438 | * the InletLiquid stream of the top tray; |
| 439 | * the InletVapour stream of the bottom tray. |
| 440 | |
| 441 | == Initial Conditions == |
| 442 | * the TRAYS temperature (OutletLiquid.T); |
| 443 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
| 444 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
| 445 | "; |
| 446 | |
| 447 | SET |
| 448 | NumberOfFeeds = 1; |
| 449 | |
| 450 | VARIABLES |
| 451 | |
| 452 | in FeedTray as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
| 453 | |
| 454 | EQUATIONS |
| 455 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 456 | # Equating Feed Tray Variables to Trays Variables |
| 457 | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 458 | for i in 1:NumberOfTrays do |
| 459 | |
| 460 | if i equal FeedTrayLocation(1) then |
| 461 | |
| 462 | "FeedTrayTop Inlet Flow" |
| 463 | FeedTray.F= TRAYS(i).Inlet.F; |
| 464 | |
| 465 | "FeedTrayTop Inlet Temperature" |
| 466 | FeedTray.T = TRAYS(i).Inlet.T; |
| 467 | |
| 468 | "FeedTrayTop Inlet Pressure" |
| 469 | FeedTray.P = TRAYS(i).Inlet.P; |
| 470 | |
| 471 | "FeedTrayTop Inlet Composition" |
| 472 | FeedTray.z = TRAYS(i).Inlet.z; |
| 473 | |
| 474 | "FeedTrayTop Inlet Vapour Fraction" |
| 475 | FeedTray.v = TRAYS(i).Inlet.v; |
| 476 | |
| 477 | "FeedTrayTop Inlet Enthalpy" |
| 478 | FeedTray.h = TRAYS(i).Inlet.h; |
| 479 | |
| 480 | else |
| 481 | |
| 482 | "Inlet Tray - Flow Sealed" |
| 483 | 0*'mol/h'= TRAYS(i).Inlet.F; |
| 484 | |
| 485 | "Inlet Tray - Temperature" |
| 486 | FeedTray.T = TRAYS(i).Inlet.T; |
| 487 | |
| 488 | "Inlet Tray - Pressure" |
| 489 | FeedTray.P = TRAYS(i).Inlet.P; |
| 490 | |
| 491 | "Inlet Tray - Composition" |
| 492 | FeedTray.z = TRAYS(i).Inlet.z; |
| 493 | |
| 494 | "Inlet Tray - Vapour Fraction" |
| 495 | FeedTray.v = TRAYS(i).Inlet.v; |
| 496 | |
| 497 | "Inlet Tray - Enthalpy" |
| 498 | FeedTray.h = TRAYS(i).Inlet.h; |
| 499 | |
| 500 | end |
| 501 | |
| 502 | end |
| 503 | |
| 504 | end |
| 505 | |
| 506 | Model Section_Column2 as SectionColumnBasic |
| 507 | |
| 508 | ATTRIBUTES |
| 509 | Pallete = true; |
| 510 | Icon = "icon/SectionColumn"; |
| 511 | Brief = "Model of a column section."; |
| 512 | Info = |
| 513 | "== Model of a column section containing == |
| 514 | * NumberOfTrays TRAYS. |
| 515 | * Two Feed Inlets. |
| 516 | |
| 517 | == Specify == |
| 518 | * the feed stream of each tray (Inlet); |
| 519 | * the Murphree eficiency for each tray Emv; |
| 520 | * the InletLiquid stream of the top tray; |
| 521 | * the InletVapour stream of the bottom tray. |
| 522 | |
| 523 | == Initial Conditions == |
| 524 | * the TRAYS temperature (OutletLiquid.T); |
| 525 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
| 526 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
| 527 | "; |
| 528 | |
| 529 | SET |
| 530 | NumberOfFeeds = 2; |
| 531 | |
| 532 | VARIABLES |
| 533 | |
| 534 | in FeedTrayOne as stream (Brief="Feed stream", PosX=0, PosY=0.45); |
| 535 | in FeedTrayTwo as stream (Brief="Feed stream", PosX=0, PosY=0.65); |
| 536 | |
| 537 | EQUATIONS |
| 538 | |
| 539 | for i in 1:NumberOfTrays do |
| 540 | |
| 541 | if i equal FeedTrayLocation(1) then |
| 542 | |
| 543 | "FeedTrayTop Inlet Flow" |
| 544 | FeedTrayOne.F= TRAYS(i).Inlet.F; |
| 545 | |
| 546 | "FeedTrayTop Inlet Temperature" |
| 547 | FeedTrayOne.T = TRAYS(i).Inlet.T; |
| 548 | |
| 549 | "FeedTrayTop Inlet Pressure" |
| 550 | FeedTrayOne.P = TRAYS(i).Inlet.P; |
| 551 | |
| 552 | "FeedTrayTop Inlet Composition" |
| 553 | FeedTrayOne.z = TRAYS(i).Inlet.z; |
| 554 | |
| 555 | "FeedTrayTop Inlet Vapour Fraction" |
| 556 | FeedTrayOne.v = TRAYS(i).Inlet.v; |
| 557 | |
| 558 | "FeedTrayTop Inlet Enthalpy" |
| 559 | FeedTrayOne.h = TRAYS(i).Inlet.h; |
| 560 | |
| 561 | else if i equal FeedTrayLocation(2) then |
| 562 | |
| 563 | "FeedTrayBottom Inlet Flow" |
| 564 | FeedTrayTwo.F= TRAYS(i).Inlet.F; |
| 565 | |
| 566 | "FeedTrayBottom Inlet Temperature" |
| 567 | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
| 568 | |
| 569 | "FeedTrayBottom Inlet Pressure" |
| 570 | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
| 571 | |
| 572 | "FeedTrayBottom Inlet Composition" |
| 573 | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
| 574 | |
| 575 | "FeedTrayBottom Inlet Vapour Fraction" |
| 576 | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
| 577 | |
| 578 | "FeedTrayBottom Inlet Enthalpy" |
| 579 | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
| 580 | |
| 581 | else |
| 582 | |
| 583 | "Inlet Tray - Flow Sealed" |
| 584 | 0*'mol/h'= TRAYS(i).Inlet.F; |
| 585 | |
| 586 | "Inlet Tray - Temperature" |
| 587 | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
| 588 | |
| 589 | "Inlet Tray - Pressure" |
| 590 | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
| 591 | |
| 592 | "Inlet Tray - Composition" |
| 593 | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
| 594 | |
| 595 | "Inlet Tray - Vapour Fraction" |
| 596 | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
| 597 | |
| 598 | "Inlet Tray - Enthalpy" |
| 599 | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
| 600 | |
| 601 | end |
| 602 | |
| 603 | end |
| 604 | |
| 605 | end |
| 606 | |
| 607 | end |
| 608 | |
| 609 | Model Section_Column3 as SectionColumnBasic |
| 610 | |
| 611 | ATTRIBUTES |
| 612 | Pallete = true; |
| 613 | Icon = "icon/SectionColumn"; |
| 614 | Brief = "Model of a column section."; |
| 615 | Info = |
| 616 | "== Model of a column section containing == |
| 617 | * NumberOfTrays TRAYS. |
| 618 | * Three Feed Inlets. |
| 619 | |
| 620 | == Specify == |
| 621 | * the feed stream of each tray (Inlet); |
| 622 | * the Murphree eficiency for each tray Emv; |
| 623 | * the InletLiquid stream of the top tray; |
| 624 | * the InletVapour stream of the bottom tray. |
| 625 | |
| 626 | == Initial Conditions == |
| 627 | * the TRAYS temperature (OutletLiquid.T); |
| 628 | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
| 629 | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
| 630 | "; |
| 631 | |
| 632 | SET |
| 633 | NumberOfFeeds = 3; |
| 634 | |
| 635 | VARIABLES |
| 636 | |
| 637 | in FeedTrayOne as stream (Brief="Feed stream", PosX=0, PosY=0.45); |
| 638 | in FeedTrayTwo as stream (Brief="Feed stream", PosX=0, PosY=0.65); |
| 639 | in FeedTrayThree as stream (Brief="Feed stream", PosX=0, PosY=0.85); |
| 640 | |
| 641 | EQUATIONS |
| 642 | |
| 643 | for i in 1:NumberOfTrays do |
| 644 | |
| 645 | if i equal FeedTrayLocation(1) then |
| 646 | |
| 647 | "FeedTrayTop Inlet Flow" |
| 648 | FeedTrayOne.F= TRAYS(i).Inlet.F; |
| 649 | |
| 650 | "FeedTrayTop Inlet Temperature" |
| 651 | FeedTrayOne.T = TRAYS(i).Inlet.T; |
| 652 | |
| 653 | "FeedTrayTop Inlet Pressure" |
| 654 | FeedTrayOne.P = TRAYS(i).Inlet.P; |
| 655 | |
| 656 | "FeedTrayTop Inlet Composition" |
| 657 | FeedTrayOne.z = TRAYS(i).Inlet.z; |
| 658 | |
| 659 | "FeedTrayTop Inlet Vapour Fraction" |
| 660 | FeedTrayOne.v = TRAYS(i).Inlet.v; |
| 661 | |
| 662 | "FeedTrayTop Inlet Enthalpy" |
| 663 | FeedTrayOne.h = TRAYS(i).Inlet.h; |
| 664 | |
| 665 | else if i equal FeedTrayLocation(2) then |
| 666 | |
| 667 | "FeedTrayBottom Inlet Flow" |
| 668 | FeedTrayTwo.F= TRAYS(i).Inlet.F; |
| 669 | |
| 670 | "FeedTrayBottom Inlet Temperature" |
| 671 | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
| 672 | |
| 673 | "FeedTrayBottom Inlet Pressure" |
| 674 | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
| 675 | |
| 676 | "FeedTrayBottom Inlet Composition" |
| 677 | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
| 678 | |
| 679 | "FeedTrayBottom Inlet Vapour Fraction" |
| 680 | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
| 681 | |
| 682 | "FeedTrayBottom Inlet Enthalpy" |
| 683 | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
| 684 | |
| 685 | else if i equal FeedTrayLocation(3) then |
| 686 | |
| 687 | "FeedTrayBottom Inlet Flow" |
| 688 | FeedTrayThree.F= TRAYS(i).Inlet.F; |
| 689 | |
| 690 | "FeedTrayBottom Inlet Temperature" |
| 691 | FeedTrayThree.T = TRAYS(i).Inlet.T; |
| 692 | |
| 693 | "FeedTrayBottom Inlet Pressure" |
| 694 | FeedTrayThree.P = TRAYS(i).Inlet.P; |
| 695 | |
| 696 | "FeedTrayBottom Inlet Composition" |
| 697 | FeedTrayThree.z = TRAYS(i).Inlet.z; |
| 698 | |
| 699 | "FeedTrayBottom Inlet Vapour Fraction" |
| 700 | FeedTrayThree.v = TRAYS(i).Inlet.v; |
| 701 | |
| 702 | "FeedTrayBottom Inlet Enthalpy" |
| 703 | FeedTrayThree.h = TRAYS(i).Inlet.h; |
| 704 | |
| 705 | else |
| 706 | |
| 707 | "Inlet Tray - Flow Sealed" |
| 708 | 0*'mol/h'= TRAYS(i).Inlet.F; |
| 709 | |
| 710 | "Inlet Tray - Temperature" |
| 711 | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
| 712 | |
| 713 | "Inlet Tray - Pressure" |
| 714 | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
| 715 | |
| 716 | "Inlet Tray - Composition" |
| 717 | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
| 718 | |
| 719 | "Inlet Tray - Vapour Fraction" |
| 720 | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
| 721 | |
| 722 | "Inlet Tray - Enthalpy" |
| 723 | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
| 724 | |
| 725 | end |
| 726 | |
| 727 | end |
| 728 | |
| 729 | end |
| 730 | |
| 731 | end |
| 732 | |
| 733 | end |
| 734 | |
| 735 | |
| 736 | Model ColumnBasic |
| 737 | |
| 738 | ATTRIBUTES |
| 739 | Pallete = false; |
| 740 | Brief = "Model of a basic column."; |
| 741 | Info = |
| 742 | "Model of a basic column containing a vetor of TRAYS numbered from the top-down."; |
| 743 | |
| 744 | PARAMETERS |
| 745 | outer PP as Plugin (Brief="External Physical Properties", Type="PP"); |
| 746 | outer NComp as Integer (Brief="Number of components"); |
| 747 | |
| 748 | NumberOfFeeds as Integer (Brief="Number of Feed Trays",Default=3,Protected=true); |
| 749 | FeedTrayLocation(NumberOfFeeds) as Integer (Brief="Feed tray Location",Default=2); |
| 750 | NumberOfTrays as Integer (Brief="Number of trays", Default=8); |
| 751 | LiqSideTrayIndex(NumberOfTrays) as Integer (Brief="Liquid Side Tray Index", Default=0,Hidden=true); |
| 752 | VapSideTrayIndex(NumberOfTrays) as Integer (Brief="Vapour Side Tray Index", Default=0,Hidden=true); |
| 753 | LiquidSideStreamLocation as Integer (Brief="Liquid Side Stream Location", Default=2); |
| 754 | VapourSideStreamLocation as Integer (Brief="Vapour Side Stream Location", Default=2); |
| 755 | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
| 756 | Mw(NComp) as molweight (Brief="Component Mol Weight",Hidden=true); |
| 757 | |
| 758 | VapourFlowModel as Switcher (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer"); |
| 759 | LiquidFlowModel as Switcher (Valid = ["default", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "default"); |
| 760 | |
328 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
329 | | # Equating Inlet Liquid Connector Variables |
330 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
331 | | "Liquid Inlet Flow" |
332 | | LiquidConnector.F = LiquidInlet.F; |
333 | | |
334 | | "Liquid Inlet Temperature" |
335 | | LiquidConnector.T = LiquidInlet.T; |
336 | | |
337 | | "Liquid Inlet Pressure" |
338 | | LiquidConnector.P = LiquidInlet.P; |
339 | | |
340 | | "Liquid Inlet Composition" |
341 | | LiquidConnector.z = LiquidInlet.z; |
342 | | |
343 | | "Liquid Inlet Vapour Fraction" |
344 | | LiquidConnector.v = LiquidInlet.v; |
345 | | |
346 | | "Liquid Inlet Enthalpy" |
347 | | LiquidConnector.h = LiquidInlet.h; |
348 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
349 | | # Equating Inlet Vapour Connector Variables |
350 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
351 | | "Vapour Inlet Flow" |
352 | | VapourConnector.F = VapourInlet.F; |
353 | | |
354 | | "Vapour Inlet Temperature" |
355 | | VapourConnector.T = VapourInlet.T; |
356 | | |
357 | | "Vapour Inlet Pressure" |
358 | | VapourConnector.P = VapourInlet.P; |
359 | | |
360 | | "Vapour Inlet Composition" |
361 | | VapourConnector.z = VapourInlet.z; |
362 | | |
363 | | "Vapour Inlet Vapour Fraction" |
364 | | VapourConnector.v = VapourInlet.v; |
365 | | |
366 | | "Vapour Inlet Enthalpy" |
367 | | VapourConnector.h = VapourInlet.h; |
368 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
369 | | # Equating Outlet Liquid Variables |
370 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
371 | | "Liquid Outlet Flow" |
372 | | LiquidOutlet.F = TRAYS(NumberOfTrays).OutletLiquid.F; |
373 | | |
374 | | "Liquid Outlet Temperature" |
375 | | LiquidOutlet.T = TRAYS(NumberOfTrays).OutletLiquid.T; |
376 | | |
377 | | "Liquid Outlet Pressure" |
378 | | LiquidOutlet.P = TRAYS(NumberOfTrays).OutletLiquid.P; |
379 | | |
380 | | "Liquid Outlet Composition" |
381 | | LiquidOutlet.z = TRAYS(NumberOfTrays).OutletLiquid.z; |
382 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
383 | | # Equating Outlet Vapour Variables |
384 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
385 | | "Vapour Outlet Flow" |
386 | | VapourOutlet.F = TRAYS(1).OutletVapour.F; |
387 | | |
388 | | "Vapour Outlet Temperature" |
389 | | VapourOutlet.T = TRAYS(1).OutletVapour.T; |
390 | | |
391 | | "Vapour Outlet Pressure" |
392 | | VapourOutlet.P = TRAYS(1).OutletVapour.P; |
393 | | |
394 | | "Vapour Outlet Composition" |
395 | | VapourOutlet.z = TRAYS(1).OutletVapour.z; |
396 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
397 | | # Equating Outlet Vapour Side Stream Variables |
398 | | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
399 | | "Vapour Draw Off Stream - Flow" |
400 | | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
401 | | |
402 | | "Vapour Draw Off Stream - Temperature" |
403 | | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
404 | | |
405 | | "Vapour Draw Off Stream - Pressure" |
406 | | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
407 | | |
408 | | "Vapour Draw Off Stream - Composition" |
409 | | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
410 | | |
411 | | "Vapour Draw Off Stream" |
412 | | VapourDrawOffFlow = VapourDrawOff.F; |
413 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
414 | | # Equating Outlet Liquid Side Stream Variables |
415 | | #+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
416 | | "Liquid Draw Off Stream - Flow" |
417 | | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
418 | | |
419 | | "Liquid Draw Off Stream - Temperature" |
420 | | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
421 | | |
422 | | "Liquid Draw Off Stream - Pressure" |
423 | | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
424 | | |
425 | | "Liquid Draw Off Stream - Composition" |
426 | | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
427 | | |
428 | | "Liquid Draw Off Stream" |
429 | | LiquidDrawOffFlow = LiquidDrawOff.F; |
430 | | |
431 | | end |
432 | | |
433 | | Model Section_Column as SectionColumnBasic |
434 | | |
435 | | ATTRIBUTES |
436 | | Pallete = true; |
437 | | Icon = "icon/SectionColumn"; |
438 | | Brief = "Model of a column section."; |
439 | | Info = |
440 | | "== Model of a column section containing == |
441 | | * NumberOfTrays TRAYS. |
442 | | * One Feed Inlet. |
443 | | |
444 | | == Specify == |
445 | | * the feed stream of each tray (Inlet); |
446 | | * the Murphree eficiency for each tray Emv; |
447 | | * the InletLiquid stream of the top tray; |
448 | | * the InletVapour stream of the bottom tray. |
449 | | |
450 | | == Initial Conditions == |
451 | | * the TRAYS temperature (OutletLiquid.T); |
452 | | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
453 | | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
454 | | "; |
455 | | |
456 | | SET |
457 | | NumberOfFeeds = 1; |
458 | | |
459 | | VARIABLES |
460 | | |
461 | | in FeedTray as stream (Brief="Feed stream", PosX=0, PosY=0.55); |
462 | | |
463 | | EQUATIONS |
464 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
465 | | # Equating Feed Tray Variables to Trays Variables |
466 | | #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
467 | | for i in 1:NumberOfTrays do |
468 | | |
469 | | if i equal FeedTrayLocation(1) then |
470 | | |
471 | | "FeedTrayTop Inlet Flow" |
472 | | FeedTray.F= TRAYS(i).Inlet.F; |
473 | | |
474 | | "FeedTrayTop Inlet Temperature" |
475 | | FeedTray.T = TRAYS(i).Inlet.T; |
476 | | |
477 | | "FeedTrayTop Inlet Pressure" |
478 | | FeedTray.P = TRAYS(i).Inlet.P; |
479 | | |
480 | | "FeedTrayTop Inlet Composition" |
481 | | FeedTray.z = TRAYS(i).Inlet.z; |
482 | | |
483 | | "FeedTrayTop Inlet Vapour Fraction" |
484 | | FeedTray.v = TRAYS(i).Inlet.v; |
485 | | |
486 | | "FeedTrayTop Inlet Enthalpy" |
487 | | FeedTray.h = TRAYS(i).Inlet.h; |
488 | | |
489 | | else |
490 | | |
491 | | "Inlet Tray - Flow Sealed" |
492 | | 0*'mol/h'= TRAYS(i).Inlet.F; |
493 | | |
494 | | "Inlet Tray - Temperature" |
495 | | FeedTray.T = TRAYS(i).Inlet.T; |
496 | | |
497 | | "Inlet Tray - Pressure" |
498 | | FeedTray.P = TRAYS(i).Inlet.P; |
499 | | |
500 | | "Inlet Tray - Composition" |
501 | | FeedTray.z = TRAYS(i).Inlet.z; |
502 | | |
503 | | "Inlet Tray - Vapour Fraction" |
504 | | FeedTray.v = TRAYS(i).Inlet.v; |
505 | | |
506 | | "Inlet Tray - Enthalpy" |
507 | | FeedTray.h = TRAYS(i).Inlet.h; |
508 | | |
509 | | end |
510 | | |
511 | | end |
512 | | |
513 | | end |
514 | | |
515 | | Model Section_Column2 as SectionColumnBasic |
516 | | |
517 | | ATTRIBUTES |
518 | | Pallete = true; |
519 | | Icon = "icon/SectionColumn"; |
520 | | Brief = "Model of a column section."; |
521 | | Info = |
522 | | "== Model of a column section containing == |
523 | | * NumberOfTrays TRAYS. |
524 | | * Two Feed Inlets. |
525 | | |
526 | | == Specify == |
527 | | * the feed stream of each tray (Inlet); |
528 | | * the Murphree eficiency for each tray Emv; |
529 | | * the InletLiquid stream of the top tray; |
530 | | * the InletVapour stream of the bottom tray. |
531 | | |
532 | | == Initial Conditions == |
533 | | * the TRAYS temperature (OutletLiquid.T); |
534 | | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
535 | | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
536 | | "; |
537 | | |
538 | | SET |
539 | | NumberOfFeeds = 2; |
540 | | |
541 | | VARIABLES |
542 | | |
543 | | in FeedTrayOne as stream (Brief="Feed stream", PosX=0, PosY=0.45); |
544 | | in FeedTrayTwo as stream (Brief="Feed stream", PosX=0, PosY=0.65); |
545 | | |
546 | | EQUATIONS |
547 | | |
548 | | for i in 1:NumberOfTrays do |
549 | | |
550 | | if i equal FeedTrayLocation(1) then |
551 | | |
552 | | "FeedTrayTop Inlet Flow" |
553 | | FeedTrayOne.F= TRAYS(i).Inlet.F; |
554 | | |
555 | | "FeedTrayTop Inlet Temperature" |
556 | | FeedTrayOne.T = TRAYS(i).Inlet.T; |
557 | | |
558 | | "FeedTrayTop Inlet Pressure" |
559 | | FeedTrayOne.P = TRAYS(i).Inlet.P; |
560 | | |
561 | | "FeedTrayTop Inlet Composition" |
562 | | FeedTrayOne.z = TRAYS(i).Inlet.z; |
563 | | |
564 | | "FeedTrayTop Inlet Vapour Fraction" |
565 | | FeedTrayOne.v = TRAYS(i).Inlet.v; |
566 | | |
567 | | "FeedTrayTop Inlet Enthalpy" |
568 | | FeedTrayOne.h = TRAYS(i).Inlet.h; |
569 | | |
570 | | else if i equal FeedTrayLocation(2) then |
571 | | |
572 | | "FeedTrayBottom Inlet Flow" |
573 | | FeedTrayTwo.F= TRAYS(i).Inlet.F; |
574 | | |
575 | | "FeedTrayBottom Inlet Temperature" |
576 | | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
577 | | |
578 | | "FeedTrayBottom Inlet Pressure" |
579 | | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
580 | | |
581 | | "FeedTrayBottom Inlet Composition" |
582 | | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
583 | | |
584 | | "FeedTrayBottom Inlet Vapour Fraction" |
585 | | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
586 | | |
587 | | "FeedTrayBottom Inlet Enthalpy" |
588 | | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
589 | | |
590 | | else |
591 | | |
592 | | "Inlet Tray - Flow Sealed" |
593 | | 0*'mol/h'= TRAYS(i).Inlet.F; |
594 | | |
595 | | "Inlet Tray - Temperature" |
596 | | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
597 | | |
598 | | "Inlet Tray - Pressure" |
599 | | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
600 | | |
601 | | "Inlet Tray - Composition" |
602 | | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
603 | | |
604 | | "Inlet Tray - Vapour Fraction" |
605 | | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
606 | | |
607 | | "Inlet Tray - Enthalpy" |
608 | | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
609 | | |
610 | | end |
611 | | |
612 | | end |
613 | | |
614 | | end |
615 | | |
616 | | end |
617 | | |
618 | | Model Section_Column3 as SectionColumnBasic |
619 | | |
620 | | ATTRIBUTES |
621 | | Pallete = true; |
622 | | Icon = "icon/SectionColumn"; |
623 | | Brief = "Model of a column section."; |
624 | | Info = |
625 | | "== Model of a column section containing == |
626 | | * NumberOfTrays TRAYS. |
627 | | * Three Feed Inlets. |
628 | | |
629 | | == Specify == |
630 | | * the feed stream of each tray (Inlet); |
631 | | * the Murphree eficiency for each tray Emv; |
632 | | * the InletLiquid stream of the top tray; |
633 | | * the InletVapour stream of the bottom tray. |
634 | | |
635 | | == Initial Conditions == |
636 | | * the TRAYS temperature (OutletLiquid.T); |
637 | | * the TRAYS liquid level (Level) OR the TRAYS liquid flow (OutletLiquid.F); |
638 | | * (NoComps - 1) OutletLiquid (OR OutletVapour) compositions for each tray. |
639 | | "; |
640 | | |
641 | | SET |
642 | | NumberOfFeeds = 3; |
643 | | |
644 | | VARIABLES |
645 | | |
646 | | in FeedTrayOne as stream (Brief="Feed stream", PosX=0, PosY=0.45); |
647 | | in FeedTrayTwo as stream (Brief="Feed stream", PosX=0, PosY=0.65); |
648 | | in FeedTrayThree as stream (Brief="Feed stream", PosX=0, PosY=0.85); |
649 | | |
650 | | EQUATIONS |
651 | | |
652 | | for i in 1:NumberOfTrays do |
653 | | |
654 | | if i equal FeedTrayLocation(1) then |
655 | | |
656 | | "FeedTrayTop Inlet Flow" |
657 | | FeedTrayOne.F= TRAYS(i).Inlet.F; |
658 | | |
659 | | "FeedTrayTop Inlet Temperature" |
660 | | FeedTrayOne.T = TRAYS(i).Inlet.T; |
661 | | |
662 | | "FeedTrayTop Inlet Pressure" |
663 | | FeedTrayOne.P = TRAYS(i).Inlet.P; |
664 | | |
665 | | "FeedTrayTop Inlet Composition" |
666 | | FeedTrayOne.z = TRAYS(i).Inlet.z; |
667 | | |
668 | | "FeedTrayTop Inlet Vapour Fraction" |
669 | | FeedTrayOne.v = TRAYS(i).Inlet.v; |
670 | | |
671 | | "FeedTrayTop Inlet Enthalpy" |
672 | | FeedTrayOne.h = TRAYS(i).Inlet.h; |
673 | | |
674 | | else if i equal FeedTrayLocation(2) then |
675 | | |
676 | | "FeedTrayBottom Inlet Flow" |
677 | | FeedTrayTwo.F= TRAYS(i).Inlet.F; |
678 | | |
679 | | "FeedTrayBottom Inlet Temperature" |
680 | | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
681 | | |
682 | | "FeedTrayBottom Inlet Pressure" |
683 | | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
684 | | |
685 | | "FeedTrayBottom Inlet Composition" |
686 | | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
687 | | |
688 | | "FeedTrayBottom Inlet Vapour Fraction" |
689 | | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
690 | | |
691 | | "FeedTrayBottom Inlet Enthalpy" |
692 | | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
693 | | |
694 | | else if i equal FeedTrayLocation(3) then |
695 | | |
696 | | "FeedTrayBottom Inlet Flow" |
697 | | FeedTrayThree.F= TRAYS(i).Inlet.F; |
698 | | |
699 | | "FeedTrayBottom Inlet Temperature" |
700 | | FeedTrayThree.T = TRAYS(i).Inlet.T; |
701 | | |
702 | | "FeedTrayBottom Inlet Pressure" |
703 | | FeedTrayThree.P = TRAYS(i).Inlet.P; |
704 | | |
705 | | "FeedTrayBottom Inlet Composition" |
706 | | FeedTrayThree.z = TRAYS(i).Inlet.z; |
707 | | |
708 | | "FeedTrayBottom Inlet Vapour Fraction" |
709 | | FeedTrayThree.v = TRAYS(i).Inlet.v; |
710 | | |
711 | | "FeedTrayBottom Inlet Enthalpy" |
712 | | FeedTrayThree.h = TRAYS(i).Inlet.h; |
713 | | |
714 | | else |
715 | | |
716 | | "Inlet Tray - Flow Sealed" |
717 | | 0*'mol/h'= TRAYS(i).Inlet.F; |
718 | | |
719 | | "Inlet Tray - Temperature" |
720 | | FeedTrayTwo.T = TRAYS(i).Inlet.T; |
721 | | |
722 | | "Inlet Tray - Pressure" |
723 | | FeedTrayTwo.P = TRAYS(i).Inlet.P; |
724 | | |
725 | | "Inlet Tray - Composition" |
726 | | FeedTrayTwo.z = TRAYS(i).Inlet.z; |
727 | | |
728 | | "Inlet Tray - Vapour Fraction" |
729 | | FeedTrayTwo.v = TRAYS(i).Inlet.v; |
730 | | |
731 | | "Inlet Tray - Enthalpy" |
732 | | FeedTrayTwo.h = TRAYS(i).Inlet.h; |
733 | | |
734 | | end |
735 | | |
736 | | end |
737 | | |
738 | | end |
739 | | |
740 | | end |
741 | | |
742 | | end |
743 | | |
744 | | |
745 | | Model ColumnBasic |
746 | | |
747 | | ATTRIBUTES |
748 | | Pallete = false; |
749 | | Brief = "Model of a basic column."; |
750 | | Info = |
751 | | "Model of a basic column containing a vetor of TRAYS numbered from the top-down."; |
752 | | |
753 | | PARAMETERS |
754 | | outer PP as Plugin (Brief="External Physical Properties", Type="PP"); |
755 | | outer NComp as Integer (Brief="Number of components"); |
756 | | |
757 | | NumberOfFeeds as Integer (Brief="Number of Feed Trays",Default=3,Protected=true); |
758 | | FeedTrayLocation(NumberOfFeeds) as Integer (Brief="Feed tray Location",Default=2); |
759 | | NumberOfTrays as Integer (Brief="Number of trays", Default=8); |
760 | | LiqSideTrayIndex(NumberOfTrays) as Integer (Brief="Liquid Side Tray Index", Default=0,Hidden=true); |
761 | | VapSideTrayIndex(NumberOfTrays) as Integer (Brief="Vapour Side Tray Index", Default=0,Hidden=true); |
762 | | LiquidSideStreamLocation as Integer (Brief="Liquid Side Stream Location", Default=2); |
763 | | VapourSideStreamLocation as Integer (Brief="Vapour Side Stream Location", Default=2); |
764 | | g as acceleration (Brief="Gravity Acceleration",Default=9.81,Hidden=true); |
765 | | Mw(NComp) as molweight (Brief="Component Mol Weight",Hidden=true); |
766 | | |
767 | | VapourFlowModel as Switcher (Valid = ["Reepmeyer", "Feehery_Fv", "Roffel_Fv", "Klingberg", "Wang_Fv", "Elgue"], Default = "Reepmeyer"); |
768 | | LiquidFlowModel as Switcher (Valid = ["default", "Wang_Fl", "Olsen", "Feehery_Fl", "Roffel_Fl"], Default = "default"); |
769 | | |
770 | | VolumeOfTray as volume (Brief="Total Volume of the tray"); |
771 | | HeatSupply as heat_rate (Brief="Rate of heat supply"); |
772 | | PlateArea as area (Brief="Plate area = Atray - Adowncomer"); |
773 | | HolesArea as area (Brief="Total holes area"); |
774 | | WeirLength as length (Brief="Weir length"); |
775 | | WeirHeight as length (Brief="Weir height"); |
776 | | TrayLiquidPasses as Real (Brief="Number of liquid passes in the tray", Default=1); |
777 | | |
778 | | FeeheryCoeff as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true); |
779 | | ElgueCoeff as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true); |
780 | | OlsenCoeff as Real (Brief="Olsens correlation coefficient", Default=1,Hidden=true); |
781 | | |
782 | | V as volume (Brief="Total Volume of the tray",Hidden=true); |
783 | | Q as heat_rate (Brief="Rate of heat supply",Hidden=true); |
784 | | Ap as area (Brief="Plate area = Atray - Adowncomer",Hidden=true); |
785 | | Ah as area (Brief="Total holes area",Hidden=true); |
786 | | lw as length (Brief="Weir length",Hidden=true); |
787 | | hw as length (Brief="Weir height",Hidden=true); |
788 | | beta as fraction (Brief="Aeration fraction"); |
789 | | alfa as fraction (Brief="Dry pressure drop coefficient"); |
790 | | w as Real (Brief="Feeherys correlation coefficient", Unit='1/m^4', Default=1,Hidden=true); |
791 | | btray as Real (Brief="Elgues correlation coefficient", Unit='kg/m/mol^2', Default=1,Hidden=true); |
792 | | fw as Real (Brief="Olsens correlation coefficient", Default=1,Hidden=true); |
793 | | Np as Real (Brief="Number of liquid passes in the tray", Default=1,Hidden=true); |
794 | | |
795 | | VapourFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
796 | | LiquidFlow as Switcher (Valid = ["on", "off"], Default = "on",Hidden=true); |
797 | | |
798 | | SET |
799 | | VapSideTrayIndex(VapourSideStreamLocation) =1; |
800 | | LiqSideTrayIndex(LiquidSideStreamLocation) =1; |
801 | | Mw = PP.MolecularWeight(); |
802 | | |
803 | | V=VolumeOfTray; |
804 | | Q=HeatSupply; |
805 | | Ap=PlateArea; |
806 | | Ah=HolesArea; |
807 | | lw=WeirLength; |
808 | | hw=WeirHeight ; |
809 | | w=FeeheryCoeff; |
810 | | btray=ElgueCoeff; |
811 | | fw=OlsenCoeff; |
812 | | Np=TrayLiquidPasses; |
813 | | |
814 | | VARIABLES |
815 | | |
816 | | INITIALIZATION as InitializeSection (Brief = "Column Model Initialization"); |
817 | | CONTROL as ControlSection (Brief = "Control"); |
818 | | |
819 | | out TCI as control_signal (Brief="Temperature Indicator", Protected = true, PosX=1, PosY=0.55); |
820 | | out PCI as control_signal (Brief="Pressure Indicator", Protected = true, PosX=0, PosY=0.23); |
821 | | |
822 | | TRAYS(NumberOfTrays) as tray (Brief="Number of trays in the Column Section"); |
823 | | VapourDrawOffFlow as flow_mol (Brief="Vapour Draw Off Stream Molar Flow Rate"); |
824 | | LiquidDrawOffFlow as flow_mol (Brief="Vapour Draw Off Stream Molar Flow Rate"); |
825 | | MurphreeEff as Real (Brief="Murphree efficiency for All Trays",Lower=0.01,Upper=1); |
826 | | |
827 | | out VapourDrawOff as vapour_stream (Brief="Vapour Outlet in the section", PosX=1, PosY=0.388,Protected = true); |
828 | | out LiquidDrawOff as liquid_stream (Brief="Liquid Outlet in the section", PosX=1, PosY=0.47,Protected = true); |
829 | | |
830 | | CONNECTIONS |
831 | | |
832 | | #Connecting Intermediate Trays |
833 | | TRAYS([2:NumberOfTrays]).OutletVapour to TRAYS([1:NumberOfTrays-1]).InletVapour; |
834 | | TRAYS([1:NumberOfTrays-1]).OutletLiquid to TRAYS([2:NumberOfTrays]).InletLiquid; |
835 | | |
836 | | INITIAL |
837 | | |
838 | | for i in 1:NumberOfTrays do |
839 | | |
840 | | "The initial temperature of the TRAYS" |
841 | | TRAYS(i).OutletLiquid.T = INITIALIZATION.TopTemperature+(INITIALIZATION.BottomTemperature-INITIALIZATION.TopTemperature)*((i-1)/(NumberOfTrays-1)); |
842 | | |
843 | | "The initial Level of the TRAYS" |
844 | | TRAYS(i).Level = INITIALIZATION.LevelFraction*hw; |
845 | | end |
846 | | |
847 | | for i in 1:NComp-1 do |
848 | | |
849 | | for j in 1:NumberOfTrays do |
850 | | |
851 | | "The initial composition of the TRAYS - Normalized" |
852 | | TRAYS(j).OutletLiquid.z(i) = INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) +(INITIALIZATION.BottomComposition(i)/sum(INITIALIZATION.BottomComposition)-INITIALIZATION.TopComposition(i)/sum(INITIALIZATION.TopComposition) )*((j-1)/(NumberOfTrays-1)); |
853 | | end |
854 | | |
855 | | end |
856 | | |
857 | | EQUATIONS |
858 | | |
859 | | VapourDrawOff.F*VapSideTrayIndex= TRAYS.VapourSideStream.F; |
860 | | VapourDrawOff.T = TRAYS(VapourSideStreamLocation).VapourSideStream.T; |
861 | | VapourDrawOff.P = TRAYS(VapourSideStreamLocation).VapourSideStream.P; |
862 | | VapourDrawOff.z = TRAYS(VapourSideStreamLocation).VapourSideStream.z; |
863 | | |
864 | | LiquidDrawOff.F*LiqSideTrayIndex= TRAYS.LiquidSideStream.F; |
865 | | LiquidDrawOff.T = TRAYS(LiquidSideStreamLocation).LiquidSideStream.T; |
866 | | LiquidDrawOff.P = TRAYS(LiquidSideStreamLocation).LiquidSideStream.P; |
867 | | LiquidDrawOff.z = TRAYS(LiquidSideStreamLocation).LiquidSideStream.z; |
868 | | |
869 | | VapourDrawOffFlow = VapourDrawOff.F; |
870 | | LiquidDrawOffFlow = LiquidDrawOff.F; |
871 | | |
872 | | "Tray Temperature Indicator" |
873 | | #TCI*'K' = TRAYS(min([NumberOfTrays, CONTROL.Tindicator_TrayNumber])).OutletVapour.T; |
874 | | TCI*'K' = TRAYS(CONTROL.Tindicator_TrayNumber).OutletVapour.T; |
875 | | |
876 | | "Tray Pressure Indicator" |
877 | | #PCI*'atm' = TRAYS(min([NumberOfTrays, CONTROL.Pindicator_TrayNumber])).OutletVapour.P; |
878 | | PCI*'atm' = TRAYS(CONTROL.Pindicator_TrayNumber).OutletVapour.P; |
879 | | |
880 | | for i in [1:NumberOfTrays] do |
881 | | |
882 | | "Murphree Efficiency" |
883 | | TRAYS(i).OutletVapour.z = MurphreeEff * (TRAYS(i).yideal - TRAYS(i).InletVapour.z) + TRAYS(i).InletVapour.z; |
884 | | |
885 | | "Level of clear liquid over the weir" |
886 | | TRAYS(i).Level = TRAYS(i).ML*TRAYS(i).vL/Ap; |
887 | | |
888 | | "Geometry Constraint" |
889 | | V = TRAYS(i).ML* TRAYS(i).vL + TRAYS(i).MV*TRAYS(i).vV; |
890 | | |
891 | | "Energy Holdup" |
892 | | TRAYS(i).E = TRAYS(i).ML*TRAYS(i).OutletLiquid.h + TRAYS(i).MV*TRAYS(i).OutletVapour.h - TRAYS(i).OutletLiquid.P*V; |
893 | | |
894 | | "Energy Balance" |
895 | | diff(TRAYS(i).E) = ( TRAYS(i).Inlet.F*TRAYS(i).Inlet.h + TRAYS(i).InletLiquid.F*TRAYS(i).InletLiquid.h + TRAYS(i).InletVapour.F*TRAYS(i).InletVapour.h- TRAYS(i).OutletLiquid.F*TRAYS(i).OutletLiquid.h - TRAYS(i).OutletVapour.F*TRAYS(i).OutletVapour.h |
896 | | -TRAYS(i).VapourSideStream.F*TRAYS(i).VapourSideStream.h - TRAYS(i).LiquidSideStream.F*TRAYS(i).LiquidSideStream.h + Q ); |
897 | | |
898 | | switch LiquidFlow |
899 | | case "on": |
900 | | switch LiquidFlowModel |
901 | | case "default": |
902 | | "Francis Equation" |
903 | | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'1/s'*lw*((TRAYS(i).Level-(beta*hw))/(beta))^2; |
904 | | |
905 | | case "Wang_Fl": |
906 | | TRAYS(i).OutletLiquid.F*TRAYS(i).vL = 1.84*'m^0.5/s'*lw*((TRAYS(i).Level-(beta*hw))/(beta))^1.5; |
907 | | |
908 | | case "Olsen": |
909 | | TRAYS(i).OutletLiquid.F / 'mol/s'= lw*Np*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletVapour.z)/(0.665*fw)^1.5 * ((TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/TRAYS(i).rhoL/Ap)-hw)^1.5 * 'm^0.5/mol'; |
910 | | |
911 | | case "Feehery_Fl": |
912 | | TRAYS(i).OutletLiquid.F = lw*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z) * ((TRAYS(i).Level-hw)/750/'mm')^1.5 * 'm^2/s'; |
913 | | |
914 | | case "Roffel_Fl": |
915 | | TRAYS(i).OutletLiquid.F = 2/3*TRAYS(i).rhoL/sum(Mw*TRAYS(i).OutletLiquid.z)*lw*(TRAYS(i).ML*sum(Mw*TRAYS(i).OutletLiquid.z)/(Ap*1.3)/TRAYS(i).rhoL)^1.5*sqrt(2*g/ |
916 | | (2*(1 - 0.3593/'Pa^0.0888545'*abs(TRAYS(i).OutletVapour.F*sum(Mw*TRAYS(i).OutletVapour.z)/(Ap*1.3)/sqrt(TRAYS(i).rhoV))^0.177709)-1)); #/'(kg/m)^0.0888545/s^0.177709'; |
917 | | end |
918 | | when TRAYS(i).Level < (beta *hw) switchto "off"; |
919 | | |
920 | | case "off": |
921 | | "Low level" |
922 | | TRAYS(i).OutletLiquid.F = 0 * 'mol/h'; |
923 | | when TRAYS(i).Level > (beta * hw) + 1e-6*'m' switchto "on"; |
924 | | end |
925 | | |
926 | | switch VapourFlow |
927 | | case "on": |
928 | | switch VapourFlowModel |
929 | | case "Reepmeyer": |
930 | | TRAYS(i).InletVapour.F*TRAYS(i).vV = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/(TRAYS(i).rhoV*alfa))*Ah; |
931 | | |
932 | | case "Feehery_Fv": |
933 | | TRAYS(i).InletVapour.F = TRAYS(i).rhoV/Ap/w/sum(Mw*TRAYS(i).OutletVapour.z) * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-(TRAYS(i).rhoV*g*TRAYS(i).ML*TRAYS(i).vL/Ap))/TRAYS(i).rhoV); |
934 | | |
935 | | case "Roffel_Fv": |
936 | | TRAYS(i).InletVapour.F^1.08 * 0.0013 * 'kg/m/mol^1.08/s^0.92*1e5' = (TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)*1e5 - (beta*sum(TRAYS(i).M*Mw)/(Ap*1.3)*g*1e5) * (TRAYS(i).rhoV*Ah/sum(Mw*TRAYS(i).OutletVapour.z))^1.08 * 'm^1.08/mol^1.08'; |
937 | | |
938 | | case "Klingberg": |
939 | | TRAYS(i).InletVapour.F * TRAYS(i).vV = Ap * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV); |
940 | | |
941 | | case "Wang_Fv": |
942 | | TRAYS(i).InletVapour.F * TRAYS(i).vV = Ap * sqrt(((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)-TRAYS(i).rhoL*g*TRAYS(i).Level)/TRAYS(i).rhoV*alfa); |
943 | | |
944 | | case "Elgue": |
945 | | TRAYS(i).InletVapour.F = sqrt((TRAYS(i).InletVapour.P - TRAYS(i).OutletVapour.P)/btray); |
946 | | end |
947 | | when TRAYS(i).InletVapour.F < 1e-6 * 'kmol/h' switchto "off"; |
948 | | |
949 | | case "off": |
950 | | TRAYS(i).InletVapour.F = 0 * 'mol/s'; |
951 | | when TRAYS(i).InletVapour.P > TRAYS(i).OutletVapour.P + TRAYS(i).Level*g*TRAYS(i).rhoL + 1e-1 * 'atm' switchto "on"; |
952 | | end |
953 | | |
954 | | end |
955 | | |