Override the binary interaction parameter for a Fluid Type that use the HOCV equation of state

A Fluid Type can use the Hayden-O'Connell virial (HOCV) equation of state (EOS) only as the vapor equilibrium method in combination with a liquid activity coefficient (LACT) system method. That is, a Fluid Type cannot use the HOCV EOS as the main thermodynamic system method. However, you can override the binary interaction parameter regardless of how the Fluid Type uses the EOS.

The HOCV tab in the Method Data section contains a component grid for every possible binary pair in the Fluid Type, including the binary pair for the component with itself (hii). 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 HOCV tab.

Override the thermodynamic data for a Fluid Type that uses the HOCV EOS

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

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

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