modelBinaryDistillation
Extends from DistillationBase.
Information
Allows the calculation of the relative volatility using an approximation polynomia.The possibililty of a tangent point to the equilibrium line is not considered in the minimum reflux calculation.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MolarMass | mwL (from DistillationBalance) | 0 | light component molecular weight |
| Modelica.Units.SI.MolarMass | mwH (from DistillationBalance) | 0 | heavy component molecular weight |
| Boolean | molarBasis (from DistillationBalance) | true | if true, use molar fraction and kmol/h, otherwise mass fraction and kg/h |
| Feed data | |||
| Boolean | isBinaryDistillation (from DistillationBalance) | true | if true only two components are considered |
| Real | ffl (from DistillationBalance) | fixed feed flow rate of light component in kmol/h or kg/h | |
| Real | ffh (from DistillationBalance) | fixed feed flow rate of heavy component in kmol/h or kg/h | |
| Modelica.Units.SI.TemperatureDifference | fSuperHeating (from DistillationBalance) | 0 | feed superheating, subcooling if negative |
| Fraction | fGfSat (from DistillationBalance) | 0 | gas fraction of the feed, if in saturated conditions |
| Modelica.Units.SI.MolarEnthalpy | hvF (from DistillationBalance) | 41000 | feed molar vaporization enthalpy |
| Modelica.Units.SI.MolarHeatCapacity | cpFl (from DistillationBalance) | 0 | feed liquid heat capacity, if subcooled |
| Modelica.Units.SI.MolarHeatCapacity | cpFv (from DistillationBalance) | 0 | feed vapor heat capacity, if superheated |
| Top data | |||
| FreeFluids.Types.PerformanceSpecification | topFixed (from DistillationBalance) | FreeFluids.Types.PerformanceSpecification.FixedComposition | composition, flow, recovery or none are fixed |
| Fraction | dyl (from DistillationBalance) | 0.0 | fixed distillate light fraction |
| Real | dfl (from DistillationBalance) | 0.0 | fixed distillate light flow. kmol/h or kg/h |
| Fraction | dlr (from DistillationBalance) | 0.95 | fixed light recovery in distillate |
| Modelica.Units.SI.TemperatureDifference | dSubCooling (from DistillationBalance) | 0 | distillate subcooling, if total condenser used |
| Modelica.Units.SI.MolarEnthalpy | hvD (from DistillationBalance) | 41000 | distillate molar vaporization enthalpy |
| Modelica.Units.SI.MolarHeatCapacity | cpDl (from DistillationBalance) | 0 | distillate liquid heat capacity |
| Bottom data | |||
| FreeFluids.Types.PerformanceSpecification | bottomFixed (from DistillationBalance) | FreeFluids.Types.PerformanceSpecification.FixedComposition | composition, flow, recovery or none are fixed |
| Fraction | bxh (from DistillationBalance) | 0.0 | fixed bottom heavy fraction |
| Real | bfh (from DistillationBalance) | 0.0 | fixed bottom heavy flow. kmol/h or kg/h |
| Fraction | brh (from DistillationBalance) | 0.95 | fixed heavy recovery in bottom |
| Modelica.Units.SI.MolarEnthalpy | hvB (from DistillationBalance) | 41000 | bottom molar vaporization enthalpy |
| Operating conditions | |||
| Boolean | fixRatioToMinReflux (from DistillationBalance) | false | if true, the ratio reflux/minimum reflux is fixed |
| Real | minRratio (from DistillationBalance) | 1.3 | ratio used, if previous is true |
| Boolean | fixRefluxRatio (from DistillationBalance) | false | if true, the ratio reflux/distillate is fixed |
| Real | rr (from DistillationBalance) | 0 | fixed internal reflux/distillate ratio |
| Boolean | fixCondenserPower (from DistillationBalance) | false | |
| Modelica.Units.SI.Power | wc (from DistillationBalance) | 0 | fixed power removed at condenser |
| Boolean | fixReboilerPower (from DistillationBalance) | false | |
| Modelica.Units.SI.Power | wb (from DistillationBalance) | 0 | fixed power added at reboiler |
| Boolean | isPartialCondenser (from DistillationBalance) | false | if true the distillate leaves as gas |
| FreeFluids.Types.ReboilerType | reboilerType (from DistillationBase) | FreeFluids.Types.ReboilerType.Kettle | |
| Equilibrium data | |||
| Types.EquilibriumDataType | dataType (from DistillationBase) | Types.EquilibriumDataType.EquilibriumConstant | |
| Real | fkl (from DistillationBase) | 0 | Feed equilibrium constant of light component |
| Real | fkh (from DistillationBase) | 0 | Feed equilibrium constant of heavy component |
| Real | dkl (from DistillationBase) | 0 | Distillate equilibrium constant of light component |
| Real | dkh (from DistillationBase) | 0 | Distillate equilibrium constant of heavy component |
| Real | bkl (from DistillationBase) | 0 | Bottom equilibrium constant of light component |
| Real | bkh (from DistillationBase) | 0 | Bottom equilibrium constant of heavy component |
| Real | frv (from DistillationBase) | 0 | Feed relative volatility light/heavy |
| Real | drv (from DistillationBase) | 0 | Distillate relative volatility light/heavy |
| Real | brv (from DistillationBase) | 0 | Bottom relative volatility light/heavy |
| Real | a0 | 1 | polynom.coeff. for relative volatility calc. |
| Real | a1 | 0 | polynom.coeff. for relative volatility calc. |
| Real | a2 | 0 | polynom.coeff. for relative volatility calc. |
| Real | a3 | 0 | polynom.coeff. for relative volatility calc. |
| Real | a4 | 0 | polynom.coeff. for relative volatility calc. |
| Real | a5 | 0 | polynom.coeff. for relative volatility calc. |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MolarFlowRate | F (from DistillationBalance) | feed molar flow rate | |
| Modelica.Units.SI.MolarFlowRate | D (from DistillationBalance) | distillate molar flow rate | |
| Modelica.Units.SI.MolarFlowRate | B (from DistillationBalance) | bottom purge molar flow rate | |
| Modelica.Units.SI.MolarMass | Fmw (from DistillationBalance) | feed molar mass | |
| Modelica.Units.SI.MassFlowRate | Fmass (from DistillationBalance) | feed mass flow rate | |
| Modelica.Units.SI.MassFlowRate | FflMass (from DistillationBalance) | feed light mass flow rate | |
| Modelica.Units.SI.MassFlowRate | FfhMass (from DistillationBalance) | feed heavy mass flow rate | |
| Modelica.Units.SI.MolarMass | Dmw (from DistillationBalance) | distillate molar mass | |
| Modelica.Units.SI.MassFlowRate | Dmass (from DistillationBalance) | distillate mass flow rate | |
| Modelica.Units.SI.MassFlowRate | DflMass (from DistillationBalance) | distillate light mass flow rate | |
| Modelica.Units.SI.MassFlowRate | DfhMass (from DistillationBalance) | distillate heavy mass flow rate | |
| Modelica.Units.SI.MolarMass | Bmw (from DistillationBalance) | bottom molar mass | |
| Modelica.Units.SI.MassFlowRate | Bmass (from DistillationBalance) | bottom mass flow rate | |
| Modelica.Units.SI.MassFlowRate | BfhMass (from DistillationBalance) | bottom heavy mass flow rate | |
| Modelica.Units.SI.MassFlowRate | BflMass (from DistillationBalance) | bottom light mass flow rate | |
| Fraction | FZl (from DistillationBalance) | feed molar fraction of light component | |
| Fraction | FZlMass (from DistillationBalance) | feed mass fraction of light component | |
| Fraction | FZh (from DistillationBalance) | feed molar fraction of heavy component | |
| Fraction | FZhMass (from DistillationBalance) | feed mass fraction of heavy component | |
| Modelica.Units.SI.MolarFlowRate | Ffl (from DistillationBalance) | feed molar flow rate of light component | |
| Modelica.Units.SI.MolarFlowRate | Ffh (from DistillationBalance) | feed molar flow rate of heavy component | |
| Fraction | DYl (from DistillationBalance) | distillate molar fraction of light comp. | |
| Fraction | DYlMass (from DistillationBalance) | distillate mass fraction of light comp. | |
| Fraction | DYh (from DistillationBalance) | distillate molar fraction of heavy comp. | |
| Fraction | DYhMass (from DistillationBalance) | distillate mass fraction of heavy comp. | |
| Modelica.Units.SI.MolarFlowRate | Dfl (from DistillationBalance) | distillate molar flow rate of light component | |
| Modelica.Units.SI.MolarFlowRate | Dfh (from DistillationBalance) | distillate molar flow rate of heavy component | |
| Fraction | BXl (from DistillationBalance) | bottom molar fraction of light comp. | |
| Fraction | BXlMass (from DistillationBalance) | bottom mass fraction of light comp. | |
| Fraction | BXh (from DistillationBalance) | bottom molar fraction of heavy comp. | |
| Fraction | BXhMass (from DistillationBalance) | bottom mass fraction of heavy comp. | |
| Modelica.Units.SI.MolarFlowRate | Bfl (from DistillationBalance) | bottom molar flow rate of light component | |
| Modelica.Units.SI.MolarFlowRate | Bfh (from DistillationBalance) | bottom molar flow rate of heavy component | |
| Fraction | Fgf (from DistillationBalance) | feed gas fraction | |
| Real | Q (from DistillationBalance) | feed enthalpy parameter | |
| Real | RR (from DistillationBalance) | internal reflux ratio, after heating of subcooled reflux | |
| Real | RRext (from DistillationBalance) | external reflux ratio, as observed at condenser | |
| Real | BR (from DistillationBalance) | boil ratio | |
| Modelica.Units.SI.Power | Wc (from DistillationBalance) | heat removed at condenser | |
| Modelica.Units.SI.Power | Wb (from DistillationBalance) | heat added at the reboiler | |
| Modelica.Units.SI.MolarFlowRate | Le (from DistillationBalance) | liquid molar flow rate in the enrichment section | |
| Modelica.Units.SI.MolarFlowRate | Ve (from DistillationBalance) | gas molar flow rate in the enrichment section | |
| Modelica.Units.SI.MolarFlowRate | Ls (from DistillationBalance) | liquid molar flow rate in the stripping section | |
| Modelica.Units.SI.MolarFlowRate | Vs (from DistillationBalance) | gas molar flow rate in the stripping section | |
| Real | Rmin (from DistillationBase) | minimum reflux ratio | |
| Fraction | RYl (from DistillationBase) | operation lines intersection Y value | |
| Fraction | RXl (from DistillationBase) | operation lines intersection X value | |
| Real | Frv (from DistillationBase) | relative volatility of light/heavy at feed conditions | |
| Real | Drv (from DistillationBase) | top of column relative volatility l/h | |
| Real | Brv (from DistillationBase) | bottom of column relative volatility l/h | |
| Real | RVavg (from DistillationBase) | average relative volatility l/h | |
| Real | NstagesMin (from DistillationBase) | number of states at total reflux | |
| Real | Nstages (from DistillationBase) | number of stages at working reflux | |
| Real | Nplates (from DistillationBase) | number of plates needed at working reflux | |
| Real | Fstage (from DistillationBase) | optimum stage for fee, from top | |
| Fraction | FXl | liquid feed molar fraction of light component | |
| Fraction | FYl | gas feed molar fraction of light component | |
| Real | RminRV | relative volatility at minimum reflux ratio | |
| Fraction | RminYl | minimum reflux BXlgas light concentration | |
| Fraction | RminXl | minimum reflux liquid light concentration | |
| Fraction | DXl | light concentrations at top of column reflux | |
| Integer | Ne | number of enrichment stages needed | |
| Integer | Ns | number of stripping stages needed | |
| Real | Xt | ||
| Real | Yt | ||
| Real | RVt | variables for the iteration | |
| Real | Dm | mean slope of the equilibrium line at enrichment section | |
| Real | Dlambda | mean stripping factor at enrichment | |
| Real | Bm | mean slope of equilibrium line at stripping section | |
| Real | Blambda | mean stripping factor at stripping section |