Loading and storing models

You can store an existing Excel CAPE-OPEN Unit Operation model as .xum (Excel Unit-operation Model) file for re-use in another unit operation (which could be running in another simulator). Excel unit operation models contain formulas that likely reference the feed compositions in the feeds sheet. If the context in which you load the model contains a different number of compounds, the formulas refering to feed composition, and other formulas that depend on the amount of compounds in the flowsheet, may require updating.

To store an existing model, edit the unit operation. In Excel, click the Export Model on the control sheet. You will be prompted for the location of the *.xum file.

To load a stored model in a unit operation, click on Import model in the control sheet. The current spread sheet will close. Please manually close Excel.

After restoring a model, and before editing the new model or attemping to run the new model, it is strongly advised to first connect at least one of feed streams to the model, using a stream that has the proper amount of chemical compounds on there. This way, the feed and product sheets are updated to contain the proper amount of compounds, and formula references to feed compositions as well as formulas on the product sheet for the product compositions will not go lost.

Note: for models that were created using an Excel CAPE-OPEN Unit Operation version older than 1.0.29.0, the Import and Export model buttons on the control sheet may not be present; you can import a model by running the capeImportModel macro, and you can export a model by running the capeExportModel model. Choose Macro from the Tools menu, type the macro name, and click OK.

Note: when running in COFE, a quicker way to get a second copy of the same unit operation is to use copy and paste in the flowsheet itself.