Template:Feeder and Source Content Data 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.
Tag (Long/short) | Input / Calc | Calculated Variables / Options |
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ModelThe 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. |
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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 {{{UnitOp}}} 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 {{{UnitOp}}}. |
H2O(l).CorrFactor | Calc | The calculated density correction factor using all the correction factors of aqueous species in the {{{UnitOp}}} 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 {{{UnitOp}}} 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). |
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 Build 137 or later. Solids mass fraction on slurry basis (solids + liquids) |
Slurry.LiquidFrac / Slurry.Lf | Calc | Only available in 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. |
SolidMoleWt / SMoleWt | Calc | Only available in Build 139 or later. The average molecular weight of all solid species. |
LiquidMoleWt / LMoleWt | Calc | Only available in Build 139 or later. The average molecular weight of all liquid species. |
VapourMoleWt / VMoleWt | Calc | Only available in Build 139 or later. The average molecular weight of all vapour species. |
Content EnergyThese 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 in the {{{UnitOp}}} @ 0 °C. |
Cp / [email protected] | Calc | Cp of the total mixture in the {{{UnitOp}}} @ temperature. |
[email protected] | Calc | Solids Cp at the {{{UnitOp}}} temperature |
[email protected] | Calc | Liquid Cp at the {{{UnitOp}}} temperature |
[email protected] | Calc | Vapour Cp at the {{{UnitOp}}} temperature |
[email protected] | Calc | Slurry Cp at the {{{UnitOp}}} temperature |
CpCv | Calc | The ratio of specific heat at constant pressure to specific heat at constant volume at the {{{UnitOp}}} temperature. |
Enthalpy - Sensible | ||
[email protected] | Calc | The change in enthalpy, dH, (excluding phase change) from 0°C to {{{UnitOp}}} temperature for the total mixture. |
[email protected] | Calc | The change in enthalpy, dH, (excluding phase change) from 0°C to {{{UnitOp}}} temperature for the solids. |
[email protected] | Calc | The change in enthalpy, dH, (excluding phase change) from 0°C to {{{UnitOp}}} temperature for the Liquids. |
[email protected] | Calc | The change in enthalpy, dH, (excluding phase change) from 0°C to {{{UnitOp}}} temperature for the vapours, or gases. |
[email protected] | Calc | The change in enthalpy, dH, (excluding phase change) from 0°C to {{{UnitOp}}} temperature for the combined solids and liquids. |
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 {{{UnitOp}}} temperature for the total mixture. |
Total Enthalpy (previously called Enthalpy of Formation) Total Enthalpy = Heat of Formation at 25 + [math]\displaystyle{ \int\limits_{25}^{T}Cp dT\, }[/math] | ||
[email protected] | Calc | Total Enthalpy for the mixture at 0°C and 101.325 kPa, per mass. |
[email protected] | Calc | Total Enthalpy for the mixture at the {{{UnitOp}}} temperature and pressure, per mass. |
Entropy and Free Energy | ||
[email protected] | Calc | Entropy for the total mixture at 0°C and 101.325 kPa. |
[email protected] | Calc | Entropy for the total mixture at the {{{UnitOp}}} temperature and pressure. |
[email protected] | Calc | Gibbs Free Energy (mass basis) for the total mixture at 0°C and 101.325 kPa. This is only visible in Build 138 and later. |
[email protected] | Calc | Gibbs Free Energy (mass basis) for the total mixture at the {{{UnitOp}}} temperature and pressure. This is only visible in Build 138 and later. |
[email protected] | Calc | Gibbs Free Energy (mole basis) for the total mixture at the {{{UnitOp}}} temperature and pressure. This is only visible in Build 138 and later. |
Values at User defined Temperature and PressurePlease see included properties - Values at User Defined T and P. | ||
Solubility ValuesPlease see included properties - Solubility. | ||
Saturation ValuesThese 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 |
Note: User can change the BPE value limits in the Plant Model - species tab. |
Temperature / T | Calc | Temperature of the {{{UnitOp}}}. |
[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 {{{UnitOp}}}. This is only useful if the {{{UnitOp}}} 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 |
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 {{{UnitOp}}} that are used to calculate [H+] (molar concentration). |
pH.BasesPresent | List | This lists all of the bases present in the {{{UnitOp}}} 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). |
ChargePlease see included properties - Charge | ||
Transport PropertiesPlease see included properties - Transport | ||
Heats of Combustion PropertiesOnly available in Build 139 or later, please see included properties - Heats of Combustion. | ||
Solution ImpuritiesPlease see included properties - Solution Impurities. | ||
H2O PropertiesPlease see included properties - H2O Properties |
WQ Tab Page
Please see included properties - Water Quality.