Results

How to access LIBPF^® simulation results

Intermediate calculation files

All intermediate files generated during the calculations by the LIBPF^® calculation kernel are saved in the working folder, normally the directory pointed at by the home_path configuration variable.

To find out the LIBPF^® working folder on Windows:

• Launch regedit (Windows+R then Regedit)

• Browse to HKCU\Software\libpf.com\LIBPF 1.0 and look for the home_path variable

Tipically it is C:\Users\Myself\AppData\Roaming\LIBPF 1.0.

Graphical respresentation of the flowsheet connectivity

When the calculation kernel is launched to instantiate a new instance of a model, it will output in the working folder a number of SVG (Scalable Vector Graphics) files with numeric names, matching the IDs of the created objects (the model and all its sub-objects, recursively).

SVG files can be visualized with any browset and modified with Inkscape.

The FlowSheet::printDot method from the LIBPF^® C++ API:

flo.printDot("flowsheet.dot");

requests the generation of a graphviz DOT file containing the DAG (Directed Acyclic Graph) that respresents the flowsheet connectivity.

Using the graphviz dot command this file can be converted to an image format:

dot -Tpng flowsheet.dot > flowsheet.png

To invoke the dot command on Windows:

1. Install graphviz

2. Open a command window (Windows+R, then CMD.EXE)

3. Tweak the PATH so that the ‘dot.execommand is fouund:set path=%path%; C:\Programmi\ATT\Graphviz\bin`

4. Make sure the icons used for the basic units cab be found by graphviz: cd C:\Programmi\LIBPF 1.0\UIPF

5. launch the command: dot -Tsvg C:\Users\Myself\Desktop\flowsheet1.dot > flowsheet.svg

Spreadsheet results

In the working folder you’ll also find the streamtable.xls Excel file.

This file contains two worksheets:

• rawdata, this worksheet is automatically filed by UIPF with stream data retrieved from the persistency database; actually it’s a VBA (Visual Basic for Application) macro that you can inspect with ALT-F11

• formatted, this sheet presents the stream data in a user-friendly way, and can be personalized; note two “magical” cells:

  • Foglio 1::A1 = component number (if the number of components in your simulation changes you need to tweak this, and add the required rows)

  • rawdata::A1 contains the OD for the flowsheet saved to the database that the macro will data for