Common Content Section

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Content Section DSp Section QProd Section

Content Section

This section mainly has read only variables, except for the first section, Model.

  • Model determines which species model the feeder uses. The options available to the user will depend on the species model used by the project. Please refer to the species model for a description of this page, if a species model is chosen. The default, 'Standard', will be described here.
Symbol / Tag Input / Calc Calculated Variables / Options

Model

The SpModel.Reqd field is only shown if more than one Species Model is available in the project (eg. Standard and Bayer3). On a Content page, it is an input field. If SpModel.Reqd is set to Inherit, then the species model used with the be the default method as selected in the configuration file.

SpModel.Reqd Inherit Upstream configuration will be used.
Standard All the variables are calculated using the Mass Weighted Mean of the species.
Species Model Use an alternative species model, such as 'Bayer3' or 'Potash'.
SpModel.Used Standard The Standard species model is being used.
Species Model An alternative species model is being used.
SpModelType Display This field displays the Species Model type (or Name) used.

Content Properties

Temperature / T Calc The temperature of the incoming material.
Pressure / P Calc The pressure of the incoming material.

Density See the section on Density for further information.

Density / Rho Calc Calculated Density of the material
SolidDensity / SRho Calc Density of the solids phase
LiquidDensity / LRho Calc Density of the liquid phase
VapourDensity / VRho Calc Density of the vapour phase
SlurryDensity / SLRho Calc Density of the Slurry (Liquid and Solid phase)
SolidConc Calc The solids concentration at stream temperature.

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 a liquor stream 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 a liquor stream with only water and the components that have density correction functions, at 25 deg celsius.
H2O(l).AppQm Calc The calculated mass flow of a liquor stream with only water and the components that have density correction functions.
H2O(l).AppQv Calc The calculated volume flow of a liquor stream 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).

Mass Fractions

SolidFrac / Sf

Calc

Solids mass fraction

LiquidFrac / Lf

Calc

Liquid mass fraction

VapourFrac / Vf

Calc

Vapour mass fraction

Slurry.SolidFrac / Slurry.Sf Calc Only available in SysCAD 9.3 Build 137 or later. Solids mass fraction on slurry basis (solids + liquids)
Slurry.LiquidFrac / Slurry.Lf Calc Only available in SysCAD 9.3 Build 137 or later. Liquid mass fraction on slurry basis (solids + liquids)

Volume Fractions
(The following fields are only available in Build 137 or later.)

SolidVolFrac / Svf Calc Solids volume fraction
LiquidVolFrac / Lvf Calc Liquid volume fraction
VapourVolFrac / Vvf Calc Vapour volume fraction

MlSolidFrac / MlSf

Calc

Solids mole fraction

MlLiquidFrac / MlLf

Calc

Liquid mole fraction

MlVapourFrac / MlVf

Calc

Vapour mole fraction

MoleWt

Calc

The average molecular weight of all the species.

Content Energy

These properties will only be shown if the user has chosen to display the Energy (Thermodynamic) Properties on the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material flow section.

Specific Heat

[email protected]

Calc

Cp of the total mixture @ 0 °C.

Cp / [email protected]

Calc

Cp of the total mixture @ temperature.

[email protected]

Calc

Solids Cp at the unit temperature

[email protected]

Calc

Liquid Cp at the unit temperature

[email protected]

Calc

Vapour Cp at the unit temperature

[email protected]

Calc

Slurry Cp at the unit temperature

CpCv Calc The ratio of specific heat at constant pressure to specific heat at constant volume at the stream temperature.

Enthalpy - Sensible

[email protected]

Calc

Sensible heat / kg at the unit temperature

[email protected]

Calc

Enthalpy of the solids at the unit temperature

[email protected]

Calc

Enthalpy of the liquids at the unit temperature

[email protected]

Calc

Enthalpy of the vapour at the unit temperature

[email protected]

Calc

Enthalpy of the slurry at the unit temperature

Enthalpy - including Phase Change
(Please see What is the difference between Hs and Hz?

[email protected] Calc The change in enthalpy, dH,(including phase change) from 0°C to stream temperature for the entire stream.

Total Enthalpy
(previously called Enthalpy of Formation) Total Enthalpy = Heat of Formation at 25 + [math]\int\limits_{25}^{T}Cp dT\,[/math]

[email protected] Calc Total Enthalpy for the entire stream at 0°C and 101.325 kPa, per mass.
[email protected] Calc Total Enthalpy for the entire stream at the stream temperature and pressure, per mass.

Entropy and Free Energy

[email protected] Calc Entropy for the entire stream at 0°C and 101.325 kPa.
[email protected] Calc Entropy for the entire stream at the stream temperature and pressure.
[email protected] Calc Gibbs Free Energy (mass basis) for the entire stream at 0°C and 101.325 kPa. This is only visible in Build 138.
[email protected] Calc Gibbs Free Energy (mass basis) for the entire stream at the stream temperature and pressure. This is only visible in Build 138.
[email protected] Calc Gibbs Free Energy (mole basis) for the entire stream at the stream temperature and pressure. This is only visible in Build 138.

Values at User defined Temperature and Pressure

If the ValuesAtUserTandP 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:

UsrDefT Input User defined Temperature
UsrDefP Input User defined pressure. This will be the saturation pressure at the user defined temperature if * is entered for this field.
[email protected] Calc Density of the total mixture at user defined temperature and pressure.
[email protected] Calc Density of the liquid phase at user defined temperature and pressure.
[email protected] Calc Density of the vapour phase at user defined temperature and pressure.
[email protected] Calc The solids concentration at user defined temperature and pressure.
[email protected] Calc Heat capacity of the total mixture at user defined temperature and pressure.

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.

Solubility

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)".

SolubleSpecies1.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.
SolubleSpecies1.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.

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.
[email protected] Calc Saturated pressure at the mixture temperature.
[email protected] Calc Saturated temperature at the mixture's partial pressure. Will be NAN (displayed as *) when no partial pressure.
[email protected] Calc Saturated temperature at the mixture pressure.
[email protected] 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
Temperature / T Calc Temperature of the stream.
[email protected] Calc Super Heat at the mixture's partial pressure ([email protected]). Will be NAN (displayed as *) when no partial pressure.
[email protected] Calc Super Heat at the mixture's pressure ([email protected]).
[email protected] Calc Only available in Build 137 or later. The amount of Subcooling at the mixture's pressure ([email protected]).
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.
[email protected] 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.

Acidity (pH)

These values are calculated based on the Ka and Kb values for acids and bases that are defined in the species database. It does not take buffering into account, and hence is, at best, an estimate of the pH.

SysCAD does have default Ka and Kb values defined for some acids and bases, and the user may enter values for other compounds. For a description of the method that SysCAD uses to calculate the acidity values see Acidity Calculations.

These values will only be shown if the user has chosen to display the pH_Estimate variables on the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material flow section.

Acidity(@25C)
pH.State Calc Either OK - only acids or bases present, OR Acid and Base present, therefore the calculations will be inaccurate.
pH.negLogH Calc This is the negative of the log of the Hydrogen ion molar concentration at 25°C.
pH.AcidsPresent List This lists all of the acids present in the stream that are used to calculate [H+] (molar concentration).
pH.BasesPresent List This lists all of the bases present in the stream that are used to calculate [OH-] (molar concentration).
pH.H_Cation Calc Only available in Build 137 or later. Only displayed if the species list includes H+(aq). This is the negative of the log of the Hydrogen ion molar concentration at 25 °C, due only to the presence of the H+(aq) ion (all other acids and bases are ignored).

Charge

These values are calculated based on the species charges that are defined in the species database.

These values will only be shown if the user has chosen to display the Charge variables on the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material flow section.

Charge
Charge.State Calc Either Neutral (charge is balanced), Positive (positively charged) or Negative (negatively charged).
Charge.Overall Calc The overall charge of the stream.
Charge.CationsPresent List This lists all of the positively charged species present in the stream that contribute to the overall charge.
Charge.AnionsPresent List This lists all of the negatively charged species present in the stream that contribute to the overall charge.

Transport Properties

These properties are related to the transport properties of the stream, e.g. viscosity, etc. These will only be shown if the user has chosen to display the Transport Properties on the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material flow section.

Transport Properties
VViscosity Calc (Dynamic) Viscosity of the vapour phase
LViscosity Calc (Dynamic) Viscosity of the liquid phase
VKinematicVisc Calc Kinematic Viscosity of the vapour phase = Dynamic Viscosity of vapour phase (VViscosity) / Density of vapour phase (VRho)
LKinematicVisc Calc Kinematic Viscosity of the liquid phase = Dynamic Viscosity of liquid phase (LViscosity) / Density of liquid phase (LRho)
VThermalCond Calc Thermal Conductivity of the vapour phase
LThermalCond Calc Thermal Conductivity of the liquid phase
VPrandtlNo Calc Prandtl’s number for the vapour phase = heat capacity ([email protected]) * dynamic viscosity (VViscosity) / thermal conductivity (VThermalCond)
LPrandtlNo Calc Prandtl’s number for the liquid phase = heat capacity ([email protected]) * dynamic viscosity (LViscosity) / thermal conductivity (LThermalCond)
LSurfaceTens Calc Surface Tension of the liquid phase.
IF97
WaterViscosity Calc The viscosity of pure water at the stream temperature and pressure as calculated by IF97.
SteamViscosity Calc The viscosity of pure steam at the stream temperature and pressure as calculated by IF97.

Solution Impurities

Only available in Build 137 or later. This section will show impurity values. Most of these fields will only be shown if the user has chosen to display the SolutionImpurities in the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material flow section.

Solution Impurities
TotalSuspendedSolids / TSS Calc The Total Suspended Solids (TSS) is the sum of all solids species, reported as a slurry (liquids + solids) concentration.
Liquid Impurity
Liquid.Impurity.Frac / Liq.Imp.Frac Calc The mass fraction of all liquid species excluding water, in the pipe.
TotalDissolvedSolids / TDS Calc The Total Dissolved Solids (TDS) is the sum of all liquid species (not including water), reported as a liquid concentration.
Total.Impurity.Frac / Total.Imp.Frac Calc The mass fraction of all solid and liquid species excluding water, in the pipe.
Total.Impurity.Conc / Total.Imp.Conc Calc The sum of all solid and liquid species excluding water, reported as a slurry (liquids + solids) concentration.
Impurity Breakdown
AqImpurity.Frac / AqImp.Frac Calc The mass fraction of all aqueous species excluding water, in the pipe.
AqImpurity.Conc / AqImp.Conc Calc The sum of all aqueous species excluding water, reported as a liquid concentration.

H2O Properties

This section will show water/steam entropy values. These will only be shown if the user has chosen to display the H2OProperties in the Plant Model - Views tab page or from the Include Properties dropdown list on the first page of the material flow section.

The following fields are shown in SysCAD 9.3 Build 137 or later:

H2OProps (Water and Steam Properties) ...
[email protected] Calc Water vapour temperature (boiling point/saturation temperature) at stream pressure.
Water.State Calc SysCAD checks the stream properties with the steam tables and displays if under the current stream temperature and pressure, would all the H2O be liquid (water). If yes, it will display OK, if not it will display Invalid.
Water.Enthalpy / H Calc Water enthalpy (based on reference point of 0°C).
Water.IF97.Enthalpy / H Calc Water enthalpy calculated from IF97 (based on reference point of triple point of water (0.01°C)).
Water.Entropy / S Calc Water entropy (based on reference point of absolute zero (0K)).
Water.IF97.Entropy / S Calc Water entropy calculated from IF97 (based on reference point of triple point of water (0.01°C)).
Water.Density / Rho Calc Water density.
Water.IF97.Density / Rho Calc Water density calculated from IF97.
Steam.State Calc SysCAD checks the stream properties with the steam tables and displays if under the current stream temperature and pressure, would all the H2O be vapour (steam). If yes, it will display OK, if not it will display Invalid.
Steam.Enthalpy / H Calc Steam enthalpy (based on reference point of 0°C).
Steam.IF97.Enthalpy / H Calc Steam enthalpy calculated from IF97 (based on reference point of triple point of water (0.01°C)).
Steam.Entropy / S Calc Steam entropy (based on reference point of absolute zero (0K)).
Steam.IF97.Entropy / S Calc Steam entropy calculated from IF97 (based on reference point of triple point of water (0.01°C)).
Steam.Density / Rho Calc Steam density.
Steam.IF97.Density / Rho Calc Steam density calculated from IF97.

Qualities Section

The Qualities section appears on the first tab page of the Feeder and Makeup Source models.

This relates to Qualities such as Size Distribution, Lockup, etc. Some of these options are only available as specified in the model's configuration file.

Tag (Long/Short) Input / Calc Calculated Variables / Options
Qualities
(These options are only available as specified in the model's configuration file.)
Lockup.Action Input The user may choose to Create the Lockup quality. The 'Lockup' values are set on the 'DLockup' tab. The field displays the actual state of the Lock Up function: If this has been enabled then this will display 'Lockup.Action(On)', otherwise it will display 'Lockup.Action'. Please see LockUp for more information.
Note: Lockup must first be enabled on the Plant Model - Qualities Tab before the user may create it here.
MatTrack.Action Input The user may choose to Create the Material Tracking quality. The 'Tracking' values are set on the 'DTrack' tab. The field displays the actual state of the Material Tracking function: If this has been enabled then this will display 'MatTrack.Action(On)', otherwise it will display 'MatTrack.Action'. Please see Material Tracking for more information.
Note: Material Tracking must first be configured on the Plant Model - Qualities Tab before the user may create it here.
SzDist.Action Input The user may choose to Create the Size Distribution quality. The 'Size Distribution' values are set on the 'DSz' tab. The field displays the actual state of the Size Distribution function: If this has been enabled then this will display 'SzDist.Action(On)', otherwise it will display 'SzDist.Action'. Please see Size Distribution (PSD) for more information.
SzSSA.Action Input The user may choose to Create the Specific Surface Area (SSA) quality. The 'SSA' values are set on the 'SSA' tab. The field displays the actual state of the SSA function: If this has been enabled then this will display 'SzSSA.Action(On)', otherwise it will display 'SzSSA.Action'. Please see Specific Surface Area (SSA) for more information.
Lockup.InUse Display Displays the state of the LockUp function: Yes or No.
MatTrack.InUse Display Displays the state of the Material Tracking function: Yes or No.
SzDist.InUse Display Displays the state of the Size Distribution (PSD) function: Yes or No.
SzSSA.InUse Display Displays the state of the Specific Surface Area (SSA) function: Yes or No.
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