Material Flow Section - PropGroup2

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Navigation: Models ➔ Common Sections ➔ Material Flow Section ➔ Density Correction, Solubility, Saturation

Material Flow (Qo) Qxxxx Tab Include Properties Species Flow Optional Tabs
Basic Information Energy
ValuesAtUserTandP
Density Correction
Solubility
Saturation
Acidity
Charge
Transport
HeatsOfCombustion
Heating Values
Solution Impurity
H2O Properties
Water Quality Sp Tab
EC Tab
DLockup
LockUp
DTrack
Track
DSz
Sz
MSz
DSSA
SSA

Related Links: Common Content Section


This section is used to display the included properties: Density Correction, Solubility and Saturation.

Data Sections

Tag (Long/Short) Input / Calc Description/Calculated Variables / Options

Density Correction

Density Correction
H2O(l).State Data This will be OK if all of the species with density correction functions in the stream conditions are within their mass fraction limits. Any species that has exceeded it's mass fraction limit will be shown in this field.
For example, if the user has a density correction function for NiSO4(aq) that is valid up to a mass fraction of 10% NiSO4 and the stream contains 15% NiSO4(aq), this field will contain: Limit:NiSO4(aq).
H2O(l).Rho Calc The density of pure water at the temperature and pressure of the stream.
H2O(l).CorrFactor Calc The calculated density correction factor using all the correction factors of aqueous species in the stream for which density correction factors have been defined. Please see Density Correction Function.
H2O(l).AppRho Calc The calculated density of the liquor with only water and the components that have density correction functions.

Note: This value may be lower or higher than the actual liquid density if there are other liquid components in the stream that do not have density correction functions.

If the Additional Density Correction option is selected in the Plant Model - Species tab page or from the Include Properties dropdown list on the first page of the material Flow section, then the following fields will also be shown:
H2O(l).AppRho25 Calc The calculated density of the liquor with only water and the components that have density correction functions, at 25°C.
H2O(l).AppQm Calc The calculated mass flow of the liquor with only water and the components that have density correction functions.
H2O(l).AppQv Calc The calculated volume flow of the liquor with only water and the components that have density correction functions.
H2O(l).Fct.X(y) Calc The calculated density correction factor for species X(y).

Solubility Values

In this section only the fields that are relevant for the generic form of solubility, i.e. solubility equations entered in the Species Database, will be shown. For fields relating to Potash Solubility, please see Potash Solubility in Units.
Visible when Solubility data has been entered for one or more species. If Solubility is switched off, these fields are still shown, the heading changes to "Solubility (Off)".

Solubility
SolubleSpecies1.Saturated / Sat Calc This will be the saturation mass fraction of the soluble species. The tag is based on the actual species, for example NaCl.Sat. When .Act equals .Sat the mixture is saturated.
SolubleSpecies1.Actual / Act Calc This will be the actual mass fraction of the soluble species. The tag is based on the actual species, for example NaCl.Act.

Saturation Values

These properties are related to the saturation temperature and pressure of solution. These fields are only visible if the Additional Properties option for Saturation values is selected in the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material Flow section.

Saturation...
Component List Any component that has the correct Vp Equations defined in the species database maybe selected here. See VLE sub section for more information.
VapourFrac / Vf Calc Only available in Build 137 or later. Displays the vapour mass fraction.
TotalP Calc Displays the total pressure.
PartialP Calc Displays the partial pressure based on the component selected.
SatP@T Calc Saturated pressure at the mixture temperature.
SatT@PP Calc Saturated temperature at the mixture's partial pressure. Will be NAN (displayed as *) when no partial pressure.
SatT@P Calc Saturated temperature at the mixture pressure.
WaterSatT@P Calc Displays the Saturation Temperature at pressure based on pure water. This is used to calculate the Boiling point elevation. (Please see Water and Steam Properties for further information on this calculation)
BPE Calc
  1. Standard Species Model
  2. Other Species Models, e.g. Bayer
    • Streams containing other species models, such as the Alumina 3 Bayer Species Model, will always use the implemented BPE equation to calculate this value.
    • The boiling point elevation is calculated as StreamSatT@P - ComponentSatT@P.
    • The Solvent used for this calculation is water.

Note: User can change the BPE value limits in the Plant Model - species tab.

Temperature / T Calc Temperature of the stream.
SuperHeat@PP Calc Super Heat at the mixture's partial pressure (T-SatT@PP). Will be NAN (displayed as *) when no partial pressure.
SuperHeat@P Calc Super Heat at the mixture's pressure (T-SatT@P).
Subcooling@P Calc Only available in Build 137 or later. The amount of Subcooling at the mixture's pressure (SatT@P-T).
LatHtVap Calc The Latent heat of vaporisation of the listed component at the temperature and partial pressure of the vaporizing species at the local conditions. The latent heat is the difference in enthalpy between the vapour phase and the liquid phase of the species. This is calculated as Enthalpy(VapourPhase at local Temperature and Partial Pressure) - Enthalpy(Liquid Phase at T and Total Pressure). This is the enthalpy difference used in energy calculations. NB unless the partial pressure of the vaporizing species is equal to the saturation pressure, the latent heat may not have exactly the same value as for saturation conditions since the vapor phase enthalpy depends on its partial pressure.
LatHtVap@SatP Calc The Latent heat of vaporisation of the listed component at the temperature and saturation pressure of the vaporizing species corresponding to the local temperature. The latent heat is the difference in enthalpy between the vapour phase and the liquid phase of the species. This is calculated as Enthalpy(VapourPhase at Temperature, T and saturation pressure for that T, PSat(T)) - Enthalpy(Liquid Phase at T and Total Pressure). This is the latent heat that would be found in saturation tables for a given temperature.
RelHumidity Calc The relative humidity of the stream. This is only useful if the stream contains gases, such as O2, N2, Air, etc.

Relative Humidity = Partial Pressure of the Saturation Component (usually H2O) / Saturation Pressure of the Saturation Component at Stream Temperature * 100
Please see the YouTube link for a video presentation on setting up a feeder with the required Relative Humidity.