Override the binary interaction data for an NRTL-based Fluid Type

The NRTL tab in the Method Data section contains a component grid for every possible binary pair in the Fluid Type. Each binary pair has a cell that indicates the status of the binary interaction data:

• If the cell is blank, there is currently no data for the binary pair.

• If the cell has a green badge, the binary interaction data is available and comes from the default or custom data banks.

• If the cell has a function icon , the binary interaction data comes from the default or custom data banks, but the value is calculated from a correlation.

• If the cell has a blue badge, the binary interaction data is available and comes from the user-specified (that is, locally overridden) data values on the NRTL tab.

Override the thermodynamic data for an NRTL-based Fluid Type

1. In the Fluid Editor, expand the Method Data section, and then select the NRTL tab.

2. In the component grid, select the cells for the binary pairs whose binary interaction data you want to change.

   The binary interaction data for those binary pairs appears in the table on the NRTL tab.

3. In the table, change the binary interaction parameters as desired.

   See the equations preceding the table if you have questions on how the software uses each binary interaction parameter in the method calculations.

   A blue badge appears in the component grid for each binary pair whose data you modify.