Template:VLEquilibrium Data Section

|- |rowspan="13" valign="top"| VLEquilibrium || Off || Default. No VLE data is applied. The user can enter values for both P_Reqd and T_Reqd. |- || Saturated_Vap(T) || The Feeder composition will be auto adjusted to saturated VAPOUR conditions at the Temperature in the T_Reqd field. |- || Saturated_Vap(P) || The Feeder composition will be auto adjusted to saturated VAPOUR conditions at the Pressure in the P_Reqd field. |- || SuperHeat_Vap(dT,P) || This allows the Feeder mixture to be at superheated conditions at the Pressure in the P_Reqd field. The temperature will be automatically adjusted to be at the saturated temperature plus SuperHeatReqd. |- || SuperHeat_Vap(T,P) || This allows the Feeder mixture to be at superheated conditions. P_Reqd must be  ≤ P_saturated at the specified Temperature (T_Reqd)(SysCAD will auto adjust the pressure if it is greater than the saturated pressure). |- || Saturated_Liq(T) || The Feeder composition will be auto adjusted to saturated LIQUID conditions at the Temperature in the T_Reqd field. |- || Saturated_Liq(P) || The Feeder composition will be auto adjusted to saturated LIQUID conditions at the Pressure in the P_Reqd field. |- || Subcooled_Liq(dT,P) || This allows the Feeder mixture to be at sub-cooled conditions at the Pressure in the P_Reqd field. The temperature will be automatically adjusted to be at the saturated temperature minus SubCoolingReqd. |- || Subcooled_Liq(T,P) || This allows the Feeder mixture to be at sub-cooled conditions. P_Reqd must be  ≥ P_saturated at the specified Temperature (T_Reqd) (SysCAD will auto adjust the pressure if it is less than the saturated pressure). |- || Saturated(X,T) || The Feeder composition will be auto adjusted to saturated conditions at the Temperature in the T_Reqd field, with a vapour fraction (steam quality if the volatile component is H2O) of X_Reqd. |- || Saturated(X,P) || The Feeder composition will be auto adjusted to saturated conditions at the Pressure in the P_Reqd field, with a vapour fraction (steam quality if the volatile component is H2O) of X_Reqd. |- || Saturated_Non_Cond(T,P) || The vapour fraction of the volatile component (X_Rqd) will be auto adjusted to saturated conditions at the Temperature in the T_Reqd field and Pressure in the P_Reqd field, when non-condensable gases are present. |- || Relative Humidity || The Feeder must contain gases. If the user selects this option, SysCAD will adjust the amount of H2O(g) to give the required relative humidity in the gas stream. SysCAD will adjust the fractions of the gases in the Feeder other than H2O(g) proportionally.
Relative Humidity = Partial Pressure of H2O(g) / Saturation Pressure of H2O(g) at Stream Temperature * 100
Please see the YouTube link for a video presentation on using this functionality. |- | VapourCalcs|| font style="background: #ebebeb" | Display || This field is only visible if VLEquilibrium is in use. Shows VLE method and component used. |- | TemperatureReqd / T_Reqd || Input / Calc || The required temperature of the material from the feeder. This value is calculated if one of the Saturated at pressure or dT VLE options are chosen. |- | PressureReqd / P_Reqd || Input / Calc || The required input pressure. This value is not usually required for steady state mass balances. However, for energy balances, especially in the case of steam/water, it is important that the correct pressure is specified. This value is calculated if one of the Saturated at temperature VLE options is chosen. |- | StaticHead || Input || Only visible in Dynamic projects. The static head. This will affect the pressure in the downstream pipe. |- | SuperHeatReqd || Input || This field is only visible if the SuperHeat_Vap(dT,P) VLE option is selected. This is the degrees of superheat of the stream (T - Saturation temperature). |- | SubCoolingReqd || Input || This field is only visible if the SubCooled_Liq(dT,P) VLE option is selected. This is the degrees of subcooling of the stream (Saturation temperature - T). |- | X_Reqd(VapourFrac) || Input / Calc || This field is only visible if VLEquilibrium is in use. The required vapour fraction (or steam quality if the volatile component is H2O) of the material from the feeder. This value is calculated unless the Saturated(X,T) or Saturated(X,P) VLE option is chosen. |- | RelHumidityReqd || Input || This field is only visible if the RelativeHumidity VLE option is selected. This is the required relative humidity (Partial Pressure of H2O(g) / Saturation Pressure of H2O(g) at Stream Temperature) of the feed.