PCDmanager Vapor Viscosity: Step-by-Step

[nrgeng]

The step-by-step procedure that was used for entering vapor viscosity data is provided in detail here for Compound W, which has no UNIFAC Groups defined.

Start PCDmanager (see two loading messages --> OK, --> No)

1.0 Open pcd file (which has Green essential data check panels except for <T Correlations> panel)
[*] see <Component> panel
select <T Correlations> panel
[*] see IG heat capacity pane displayed showing a curve
select vapor viscosity pane
[*] see a blank <Key Value> pane
[*] see a blank <Plot> panel with no curve displayed
no property estimates are available for vapor viscosity

2.0 (Q1) How to generate an initial curve?
Ref 1 (Table 10.2, p. 143) recommends Equation 102 for vapor viscosity
in the <Key Value> pane
Select Eqn 102
{Dialog} Use table values to fit new equation? --> No
{Dialog} Reset parameters to zero (to prevent error)? --> No
enter values for Tmin and Tmax
in the <Table> panel, enter 22 for #Points
in the <Plot> panel
[*] see no curve plotted

3.0 Select the <Import> panel
select the {open file} icon
select text file type
open the file Compound W liquid viscosity (K, Pa.s) 1.1.txt with (T(K), Pa.s) data pairs
[*] see data loaded in <Import> panel
select <Data> panel
[*] see imported data in table

4.0 Select <Plot> panel
select [Fit] button
{Dialog} Reload data? --> Yes
[*] see no curve plotted
select [Fit] button several more times
[*] see no curve plotted

After all of this effort, nothing worthwhile has been accomplished. Please provide the page numbers in the reference literature that will explain what to do from here. Thank you for your help.

List of literature that has been read
Ref 1: The ChemSep Book (2nd ed)
Ref 2: ChemSepTutorial_PCDManager
Ref 3: ChemSepTutorial_DistillationOfHypotheticals

[hkooijman]

can you make the file with data (1.1.txt?) for the vapor viscosity available please?

[nrgeng]

I am using PCDmanager v6.96 (2100/6)

Repeated steps from original posting
Open PCDmanager
Click [Add New] type "Compound W"
<T Correlations >
select "vapor viscosity"
<Table> #Points "9"
<Import> Text file "Compound W vapor viscosity (K, Pa.s) 1.1"
<Plot>
Eq. No. "102"
<Fit>

Problem as before nothing is plotted.

I have emailed the file "Compound W vapor viscosity (K, Pa.s) 1.1."

[nrgeng]

I downloaded "new" version but same version number in [Help] [About] display. Why? I witnessed the download but the version had the same number as before. Do you (will you) change the version number so users know what is being run? Did I just reload the old version?

How to download new versions of PCDmanager? What procedure do you recommend?

Vapor Viscosity Data Fitting
Problem: Exception Report--"Floating point overflow"
No Plot for Eqn 102

Seems to be the same problem as before. The number of <Table> points seems to read in the 9 data pairs (after the 2nd attempt).

Please continue to work on PCDmanager.

[hkooijman]

The blank screen for the plot should now not appear anymore.
Note that the version number counter only shows X.YY and this limits the number of updates between major numbers to 99. This is much too litte and hence we update other (internal) numbers.
Further note that the fit capability will be improved in v7.00
Harry