modelPCDelft
Delft model 2004 for structured packing. Not very good for pressure drop (too high). Bad for liquid holdup after loading point (it is constant)
Extends from PackedColumnExtended (24+20=44 variables,16+8=24 equations, 20 lacking).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Physical prop. | |||
| Integer | physProp (from PackedColumnBasic) | 0 | origin of the physical properties data. 0= equation, 1=parameters, 2=Medium |
| Modelica.Units.SI.Temperature | T (from PackedColumnBasic) | 298.15 | absolute temperature of the medium, if used |
| Modelica.Units.SI.AbsolutePressure | P (from PackedColumnBasic) | 1e5 | absolute pressure of the medium, if used |
| Modelica.Units.SI.Density | rhoL (from PackedColumnBasic) | 0 | liquid density to use if physProp==1 |
| Modelica.Units.SI.Density | rhoG (from PackedColumnBasic) | 0 | gas density to use if physProp==1 |
| Modelica.Units.SI.DynamicViscosity | muL (from PackedColumnBasic) | 0 | liquid viscosity to use if physProp==1 |
| Modelica.Units.SI.DynamicViscosity | muG (from PackedColumnExtended) | 0 | Dynamic viscosity of gas phase if physProp==1 |
| Modelica.Units.SI.SurfaceTension | sigmaL (from PackedColumnExtended) | 0 | Surface tension of the liquid if physProp==1 |
| Modelica.Units.SI.DiffusionCoefficient | dL (from PackedColumnExtended) | 0 | diffusion coefficients in liquid phase if physProp==1 or 2 |
| Modelica.Units.SI.DiffusionCoefficient | dG (from PackedColumnExtended) | 0 | diffusion coefficients in gas phase if physProp==1 or 2 |
| Physical data | |||
| Real | epsilon (from PackedColumnBasic) | 0.965 | void fraction of the package |
| Real | av (from PackedColumnBasic) | 0 | specific surface of the packed m2/m3 |
| Modelica.Units.SI.Angle | alpha | angle of packing channels with horizontal | |
| Modelica.Units.SI.Height | hPb | 0 | height of the packed bed |
| Modelica.Units.SI.Height | hPe | 0 | height of the packing element |
| Real | omega | 0 | percentage of packing surface occupied by holes |
| Operating conditions | |||
| Real | lambda (from PackedColumnExtended) | 1 | stripping factor |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real | Av (from PackedColumnBasic) | ||
| Modelica.Units.SI.Diameter | Di (from PackedColumnBasic) | column internal diameter | |
| Modelica.Units.SI.Area | S (from PackedColumnBasic) | column section | |
| Modelica.Units.SI.MassFlowRate | Gl (from PackedColumnBasic) | Liquid massic flow rate | |
| Modelica.Units.SI.MassFlowRate | Gg (from PackedColumnBasic) | Gas massic flow rate | |
| Modelica.Units.SI.VolumeFlowRate | Ql (from PackedColumnBasic) | Liquid volumetric flow rate | |
| Modelica.Units.SI.VolumeFlowRate | Qg (from PackedColumnBasic) | Gas volumetric flow rate | |
| Modelica.Units.SI.Velocity | Vl (from PackedColumnBasic) | actual liquid velocity, referenced to the empty column | |
| Modelica.Units.SI.Velocity | Vg (from PackedColumnBasic) | actual gas velocity, referenced to the empty column | |
| Modelica.Units.SI.Density | RhoL (from PackedColumnBasic) | ||
| Modelica.Units.SI.Density | RhoG (from PackedColumnBasic) | ||
| Real | Fg (from PackedColumnBasic) | Gas Load factor at operating conditions | |
| Real | FgFl1 (from PackedColumnBasic) | Gas Load factor at loading conditions | |
| Modelica.Units.SI.DynamicViscosity | MuL (from PackedColumnBasic) | Dynamic viscosity of liquid phase | |
| Modelica.Units.SI.ReynoldsNumber | ReL (from PackedColumnBasic) | Reynolds number of liquid phase at operating conditions | |
| Modelica.Units.SI.FroudeNumber | FrL (from PackedColumnBasic) | Froude number of liquid at operating conditions | |
| Modelica.Units.SI.MassFlowRate | GlFl1 (from PackedColumnBasic) | Liquid massic flow rate at flooding | |
| Modelica.Units.SI.MassFlowRate | GgFl1 (from PackedColumnBasic) | Gas massic flow rate at flooding | |
| Modelica.Units.SI.VolumeFlowRate | QlFl1 (from PackedColumnBasic) | Liquid volumetric flow rate at flooding | |
| Modelica.Units.SI.VolumeFlowRate | QgFl1 (from PackedColumnBasic) | Gas volumetric flow rate at flooding | |
| Modelica.Units.SI.Velocity | VlFl1 (from PackedColumnBasic) | Liquid flooding velocity | |
| Modelica.Units.SI.Velocity | VgFl1 (from PackedColumnBasic) | Gas flooding velocity | |
| Modelica.Units.SI.ReynoldsNumber | ReLfl1 (from PackedColumnBasic) | Reynolds number of liquid phase at flooding conditions | |
| Fraction | Load (from PackedColumnBasic) | fraction of maximum gas Load, at operating conditions | |
| Real | DiffP_h (from PackedColumnBasic) | pressure drop per meter of packing in (Pa/m) | |
| MediumL.ThermodynamicState | StateL (from PackedColumnBasic) | ||
| MediumG.ThermodynamicState | StateG (from PackedColumnBasic) | ||
| Modelica.Units.SI.DynamicViscosity | MuG (from PackedColumnExtended) | Dynamic viscosity of gas phase | |
| Modelica.Units.SI.SurfaceTension | SigmaL (from PackedColumnExtended) | Surface tension of the liquid | |
| Modelica.Units.SI.DiffusionCoefficient | Dl (from PackedColumnExtended) | diffusion coefficients in liquid phase | |
| Modelica.Units.SI.DiffusionCoefficient | Dg (from PackedColumnExtended) | diffusion coefficients in gas phase | |
| Modelica.Units.SI.ReynoldsNumber | ReG (from PackedColumnExtended) | Reynolds number of gas phase at operating conditions | |
| Modelica.Units.SI.WeberNumber | WeL (from PackedColumnExtended) | Weber number of liquid phase at operating conditions | |
| Modelica.Units.SI.SchmidtNumber | ScL (from PackedColumnExtended) | Schmidt number of liquid phase at operating conditions | |
| Modelica.Units.SI.SchmidtNumber | ScG (from PackedColumnExtended) | Schmidt number of gas phase at operating conditions | |
| Modelica.Units.SI.Velocity | VlS1 (from PackedColumnExtended) | Liquid velocity at loading point (fixed L/G ratio) | |
| Modelica.Units.SI.Velocity | VgS1 (from PackedColumnExtended) | Gas velocity at loading point (fixed L/G ratio) | |
| Modelica.Units.SI.Velocity | VgS2 (from PackedColumnExtended) | Gas velocity at loading point (fixed Vl) | |
| Modelica.Units.SI.Velocity | VgFl2 (from PackedColumnExtended) | Gas velocity at flooding point (fixed Vl) | |
| Real | FgS1 (from PackedColumnExtended) | Gas loading factor at loading point(fixed L/G ratio) | |
| Real | FgS2 (from PackedColumnExtended) | Gas loading factor at loading point(fixed Vl) | |
| Real | FgFl2 (from PackedColumnExtended) | Gas loading factor at flooding point(fixed Vl) | |
| Real | Aph (from PackedColumnExtended) | Specific interface area between phases (m2/m3) | |
| Real | BetaL (from PackedColumnExtended) | Mass transfer coeff. in liquid phase m/s | |
| Real | BetaG (from PackedColumnExtended) | Mass transfer coeff. in gas phase m/s | |
| Modelica.Units.SI.Height | HTUl (from PackedColumnExtended) | Height of the transfer unit for liquid phase | |
| Modelica.Units.SI.Height | HTUg (from PackedColumnExtended) | Height of the transfer unit for gas phase | |
| Modelica.Units.SI.Height | HTUov (from PackedColumnExtended) | Overall height of the transfer unit | |
| Modelica.Units.SI.Height | HETP (from PackedColumnExtended) | Height equivalent to a theoretical plate | |
| Modelica.Units.SI.Length | Sw | width of the packing sheets between coarrugations | |
| Modelica.Units.SI.Length | h | height of the packing coarrugations | |
| Modelica.Units.SI.Length | B | distance between edges of coarrugation | |
| Modelica.Units.SI.Angle | AlphaL | efective flow angle of the liquid | |
| Real | phi | fraction of the gas flow channel occupied by the liquid | |
| Modelica.Units.SI.Distance | deltaL | mean thickness of liquid film | |
| Real | Hl | liquid holdup at operating conditions | |
| Modelica.Units.SI.Velocity | Vle | ||
| Modelica.Units.SI.Velocity | Vge | effective velocities of liquid and gas | |
| Modelica.Units.SI.Diameter | dhG | hydraulic diameter of the triangular gas flow channel | |
| Modelica.Units.SI.ReynoldsNumber | ReGe | Gas Reynods numbers effective | |
| Modelica.Units.SI.ReynoldsNumber | ReGr | Gas Reynods numbers relative | |
| Real | XiGL | Gas-liquid friction factor | |
| Real | zetaGL | ||
| Real | zetaGG | ||
| Real | zetaDC | Overall gas-liquid, gas-gas, and direction change, pressure losses coefficients | |
| Real | xiWall | ||
| Real | xiBulk | direction change factors for wall and bulk zones | |
| Real | Psi | fraction of gas flow channels ending at column walls | |
| Real | Fload | Correction factor for pressure loss | |
| Real | betaGlam | gas phase mass transfer coeff. under laminar conditions | |
| Real | betaGturb | gas phase mass transfer coeff. under turbulent conditions |