eml / source

Material stream source

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This model should be used for boundary streams. Usually these streams are known and come from another process units.
The user should specify: * Total molar (mass or volumetric) flow * Temperature * Pressure * Molar (mass or volumetric) composition No matter the specification set, the model will calculate some additional properties: * Mass density * Mass flow * Mass compostions * Specific volume * Vapour fraction * Volumetric flow * Liquid and Vapour compositions


Parameters


outer
PP as Plugin		  Display Unit
 External Physical Properties
 

outer
NComp as Integer		 

 Number of chemical components
 

M as molweight		 

 Component Mol Weight
 kg/kmol

rhoModel as Switcher		 

 Density model
 

Variables


x as fraction		  Display Unit
 Liquid Molar Fraction
 

y as fraction		 

 Vapour Molar Fraction
 

hl as enth_mol		 

 Liquid Enthalpy
 kJ/kmol

hv as enth_mol		 

 Vapour Enthalpy
 kJ/kmol

s as entr_mol		 

 Stream Entropy
 kJ/kmol/K

sl as entr_mol		 

 Liquid Entropy
 kJ/kmol/K

sv as entr_mol		 

 Vapour Entropy
 kJ/kmol/K

zmass as fraction		 

 Mass Fraction
 

Mw as molweight		 

 Average Mol Weight
 kg/kmol

vm as volume_mol		 

 Molar Volume
 m^3/mol

rho as dens_mass		 

 Stream Mass Density
 kg/m^3

rhom as dens_mol		 

 Stream Molar Density
 kmol/m^3

Fw as flow_mass		 

 Stream Mass Flow
 kg/h

Fvol as flow_vol		 

 Volumetric Flow
 m^3/h

Equations

Flash Calculation
 
 array=Flash PP
 
Overall Enthalpy
 
 h _{out}=\left(1-v _{out}\right)\cdot hl+v _{out}\cdot hv
 
Liquid Enthalpy
 
 hl=LiquidEnthalpy PP
 
Vapour Enthalpy
 
 hv=VapourEnthalpy PP
 
Overall Entropy
 
 s=\left(1-v _{out}\right)\cdot sl+v _{out}\cdot sv
 
Liquid Entropy
 
 sl=LiquidEntropy PP
 
Vapour Entropy
 
 sv=VapourEntropy PP
 
Average Molecular Weight
 
 Mw=\sum\left(M\cdot z _{out}\right)
 
Mass or Molar Density
 
 rhom\cdot Mw=rho
 
Flow Mass
 
 Fw=Mw\cdot F _{out}
 
Molar Volume
 
 vm=\left(1-v _{out}\right)\cdot LiquidVolume PP+v _{out}\cdot VapourVolume PP
 
Volumetric Flow
 
 Fvol=F _{out}\cdot vm
 
Mass Fraction
 
 zmass=M\cdot \dfrac{z _{out}}{Mw}
 

volume

Molar Density
 
 rhom\cdot vm=1
 

correlation

Mass Density
 
 rho\cdot \left(\dfrac{1-v _{out}}{LiquidDensity PP}+\dfrac{v _{out}}{VapourDensity PP}\right)=1
 

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