Flowsheet Optimizer Constraints Window

Constraints limit the value of an expression to a specified range during the optimization. The constraint expression may be a single flowsheet parameter or it may be the sum, difference, product or quotient of any two flowsheet parameters. In the latter case, the second parameter may be a constant value.

How to Specify a Constraint

The constraint is set up in the Optimizer Constraints Window which is opened by pressing the Constraints button on the Optimizer Main Window.

$image\EDIT03.gif$ Check the "Use Constraints" option to make the constraints table available.

$image\EDIT03.gif$ By default, the constraint will apply to a single flowsheet parameter. To specify an expression, click on the "=" sign and select from the list.

$image\EDIT03.gif$ Click on the "Parameter" text to open the Optimizer - Parameter Window in order to select the required parameter. After a selection is made, the "Parameter" text will be replaced by a text describing the selected parameter.

$image\EDIT03.gif$ If you have specified an expression, click on the second "Parameter" text in order to select the other parameter or constant value.

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