Aspen Physical Property System - Physical Property Models

If THRSWT/6 is This equation is used And this parameter is used
200-211 Barin CPLXP1, CPLXP2
301 PPDS CPLPDS
401 IK-CAPE heat capacity
polynomial
403 IK-CAPE liquid heat
capacity
503 NIST ThermoML
polynomial
2 Thermodynamic Property Models 215
CPLPO
CPLIKC
CPLTMLPO
506 NIST TDE equation CPLTDECS
This liquid heat capacity model is used to calculate pure component liquid
heat capacity and pure component liquid enthalpy. To use this model, two
conditions must exist:
� One of the parameters for calculating heat capacity (see table) is
available.
� The component is not supercritical (HENRY-COMP).
The model uses a specific method (see Methods in Property Calculation
Methods and Routes):
Where
= Reference enthalpy calculated at T ref
= Ideal gas enthalpy
= Vapor enthalpy departure
= Enthalpy of vaporization
T ref is the reference temperature; it defaults to 298.15 K. You can enter a
different value for the reference temperature. This is useful when you want to
use this model for very light components or for components that are solids at
298.15K.
Activate this model by specifying the route DHL09 for the property DHL on
the Properties Property Methods Routes sheet. For equation of state property
method, you must also modify the route for the property DHLMX to use a
route with method 2 or 3, instead of method 1. For example, you can use the
route DHLMX00 or DHLMX30. You must ascertain that the route for DHLMX
that you select contains the appropriate vapor phase model and heat of
mixing calculations. Click the View button on the form to see details of the
route.
Optionally, you can specify that this model is used for only certain
components. The properties for the remaining components are then
calculated by the standard model. Use the parameter COMPHL to specify the