This function lets the user trace a line when fixing a given property. The property's that can be fixed are:
•Pressure
•Temperature
•Enthalpy
•Entropy
The function can trace both for the feed and inside a multi phase area.
The function works by starting performing a flash at the given temperature and pressure. The routine will then trace the fixed property in the given direction.
Input
Argument |
Type |
Optional |
Description |
Feed |
Range of double |
No |
A range of cells with the feed |
Phases |
C# : int |
No |
Number of phases on the phase line. Can be 2 to 5.
|
Temperature |
C# : double |
No |
Starting temperature |
Pressure |
C# : double |
No |
Starting pressure. |
Direction |
C# : double |
No |
Direction in pressure. |
StopProperty |
C# : string |
No |
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 |
StopValue |
C# : double |
No |
Value depends on StopProperty |
Output |
C# : string |
No |
Defines the output for each point on the curve. See here for more information. |
Components |
C# : string |
No |
Give a list of component names. Only those components are used in the calculations. |
Units |
C# : string |
No |
Set the units used in this calculation. |
Distribution |
C# : object (Expect a range of double) |
Yes |
Gives a range with the distribution of the polymer. Can for example be used if 2 flash calculations are liked as 2 separation tanks. |
BlockMassfraction |
C# : object (Expect a range of double) |
Yes |
Sets the block mass fractions in a co-polymer. |
ProjectSheet |
C#: object |
Yes |
Lets the user set the project sheet to use. |
AdvVLXE |
C# : object |
Yes |
Advanced used. Reserved for use by VLXE. |
AdvUser |
C# : object |
Yes |
Advanced used. Reserved for the user. For example it can be used to force the function update. |
Extra
This function is defined in C# as:
public Object[,] TraceMultiPhaseLine(Range Feed, int Phases, double Temperature, double Pressure, string Direction, string StopProperty, double StopValue, string Output, string Components, string Units, [In, Optional] object Distribution, [In, Optional] object BlockMassfraction, [In, Optional] object AdvVLXE, [In, Optional] object AdvUser)
Below is a screen dump showing a example where the phase envelope and the 3 phase area are calculated and displayed on the same chart:
