Aspen Physical Property System - Physical Property Models

2 Thermodynamic Property
Models
This section describes the available thermodynamic property models in the
Aspen Physical Property System. The following table provides a list of
available models, with corresponding Aspen Physical Property System model
names. The table provides phase types for which the model can be used and
information on use of the model for pure components and mixtures.
Aspen Physical Property System thermodynamic property models include
classical thermodynamic property models, such as activity coefficient models
and equations of state, as well as solids and electrolyte models. The models
are grouped according to the type of property they describe.
Thermodynamic Property Models
Phases: V = Vapor; L = Liquid; S = Solid. An X indicates applicable to Pure or
Mixture.
Equation-of-State Models
A pure component equation of state model calculates PHIL, PHIV, DHL, DHV,
DGL, DGV, DSL, DSV, VL, and VV. Most mixture equation of state models
calculate PHILMX, PHIVMX, DHLMX, DHVMX, DGLMX, DGVMX, DSLMX,
DSVMX, VLMX, and VVMX. Those marked with * only calculate DHLMX,
DHVMX, DGLMX, DGVMX, DSLMX, DSVMX, VLMX, and VVMX. The alpha
functions and mixing rules are options available in some of the models.
Property Model Model Name(s) Phase(s)Pure Mixture
ASME Steam Tables ESH2O0,ESH2O V L X —
BWR-Lee-Starling ESBWR0, ESCSTBWR V L X X
Benedict-Webb-Rubin-Starling ESBWRS, ESBWRS0 V L X X
Hayden-O'Connell ESHOC0,ESHOC V X X
HF equation-of-state ESHF0, ESHF V X X
Ideal Gas ESIG0, ESIG V X X
Lee-Kesler * ESLK V L — X
Lee-Kesler-Plöcker ESLKP0,ESLKP V L X X
NBS/NRC Steam Tables ESSTEAM0,ESSTEAM V L X —
2 Thermodynamic Property Models 11