Aspen Physical Property System - Physical Property Models

Model Name Option
Code
314 5 Property Model Option Codes
Value Descriptions
4 Vapor phase EOS used in generation of TPxy
data with UNIFAC
0 Hayden-O'Connell (default)
1 Redlich-Kwong
5 Do/do not estimate binary parameters
0 Estimate (default)
1 Set to zero
ESHF, ESHF0 1 0 Equation form for Log(k) expression:
ESRKSWS,
ESRKSWS0,
ESRKSV1,
ESRKSV10,
ESRKSV2,
ESRKSV20,
ESSTEAM,
ESSTEAM0
log(K) = A + B/T + C ln(T) + DT (default)
1 log(K) = A + B/T + CT + DT 2 + E log(P)
1 Original literature alpha function
2 Mathias-Copeman alpha function
3 Schwartzentruber-Renon alpha function
(default)
1 Equation form for alpha function
1 Original literature alpha function
2 Mathias-Copeman alpha function
3 Schwartzentruber-Renon alpha function
(default)
1 0 ASME 1967 correlations
1 NBS 1984 equation of state (default)
2 NBS 1984 equation of state with alternate root
search method (STMNBS2)
2 0 Original fugacity and enthalpy calculations
when used with STMNBS2
1 Rigorous fugacity calculation from Gibbs energy
and corrected enthalpy departure (default)
ESH2O, ESH2O0 1 0 ASME 1967 correlations (default)
1 NBS 1984 equation of state
2 NBS 1984 equation of state with alternate root
search method (STMNBS2)
Note: The enthalpy, entropy, Gibbs energy, and molar volume of water are
calculated from the steam tables when the relevant option is enabled. The
total properties are mole-fraction averages of these values with the properties
calculated by the equation of state for other components. Fugacity coefficient
is not affected.