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This function lets the user trace a line when fixing a given property. The property's that can be fixed are:
The function can trace both for the feed and inside a multi phase area.
The function works by starting performing either a flash at the given temperature and pressure or a cloud point on the phase boundary.
The routine will then trace the fixed property in the given direction.
Input
Argument
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Type
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Optional
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Description
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Feed
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Range of double
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No
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A range of cells with the feed
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StartingPoint
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C# : string
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No
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Determines the starting point. Valid input are:
| • | Feed : Trace a property for only one phase |
| • | Flash: Starting with a flash, trace a property in the 2 phase region |
| • | CloudP: Starting with a cloud P, trace a property in the 2 phase region |
| • | CloudT: Starting with a cloud T, trace a property in the 2 phase region |
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Temperature
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C# : double
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No
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Starting temperature
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Pressure
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C# : double
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No
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Starting pressure.
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FixedProperty
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C# : string
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No
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Property that is fixed on the line. Value input are:
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Direction
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C# : string
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No
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Direction in either pressure or temperature.
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StopProperty
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C# : string
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No
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Where to stop the curve. Valid input are:
| • | Automatic - The curve stops when it cannot continue |
| • | Pressure - User gives the stop pressure. |
| • | Temperature - User gives the stop temperature |
| • | Enthalpy - User gives the stop enthalpy |
| • | Entropy - User gives the stop entropy |
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StopValue
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C# : double
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No
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Value depends on the argument: StopProperty
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Output
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C# : string
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No
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Defines the output for each point on the curve. See here for more information.
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Components
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C# : string
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No
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Give a list of component names.
Only those components are used in the calculations.
See here for more information
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Units
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C# : string
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No
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Set the units used in this calculation.
See here for more information
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Minimum
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C# : object
(Expect a range of double)
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Yes
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Polymer systems only:
Minimum value for the solution temperature/pressure.
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Maximum
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C# : object
(Expect a range of double)
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Yes
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Polymer systems only:
Maximum value for the solution temperature/pressure.
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Distribution
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C# : object
(Expect a range of double)
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Yes
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Gives a range with the distribution of the polymer. Can for example be used if 2 flash calculations are liked as 2 separation tanks.
See here for more information
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BlockMassfraction
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C# : object
(Expect a range of double)
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Yes
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Sets the block mass fractions in a copolymer.
See here for more infomation
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ProjectSheet
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C#: object
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Yes
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Lets the user set the project sheet to use.
See here for more information
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AdvVLXE
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C# : object
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Yes
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Advanced used. Reserved for use by VLXE.
See here for more information
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AdvUser
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C# : object
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Yes
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Advanced used. Reserved for the user. For example it can be used to force the function update.
See here for more information
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Extra
This function is defined in C# as:
public Object[,] TracePropertyLine(Range Feed, string StartingPoint, double Temperature, double Pressure, string FixedProperty, string Direction, string StopProperty, double StopValue, string Output, string Components, string Units, [In, Optional] object Minimum, [In, Optional] object Maximum, [In, Optional] object Distribution, [In, Optional] object BlockMassfraction, [In, Optional] object AdvVLXE, [In, Optional] object AdvUser)
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