Aspen Physical Property System - Physical Property Models

Where:
�i
Vi
= Activity coefficient of component i
= Molar volume of component i
�i d = Hansen solubility parameter of component i for nonpolar
effect
�i p = Hansen solubility parameter of component i for polar effect
�i h = Hansen solubility parameter of component i for hydrogenbonding
effect
�i
xi
= Volume fraction of component i
= Mole fraction of component i
R = Gas constant
T = Temperature
The Hansen model does not require binary parameters. For each component,
it has four input parameters.
Parameter Symbol Default MDS Lower Upper Units
Name/Element
Limit Limit
DELTAD � i d — x — — PRESSURE^0.5
DELTAP � i p — x — — PRESSURE^0.5
DELTAH � i h — x — — PRESSURE^0.5
HANVOL V i — x — — VOLUME
Option codes
The Hansen volume is implemented as an input parameter. If the Hansen
volume is not input by the user it will be calculated by an Aspen Plus internal
method. You can also request the Aspen Plus method using Option Codes in
Aspen Plus Interface. The table below lists the option codes.
First Option Code in Hansen model
0 Hansen volume input by user (default)
2 Thermodynamic Property Models 113