Aspen Physical Property System - Physical Property Models

Parameter Symbol Default MDS Lower
Name/Element
Limit
276 3 Transport Property Models
Upper
Limit
Units
KLPO/2, ... , 10 C 2i , ..., C 10i 0 x — — THERMAL-
CONDUCTIVITY,
TEMPERATURE
KLPO/11 C 11i 0 x — — TEMPERATURE
KLPO/12 C 12i 1000 x — — TEMPERATURE
References
R.C. Reid, J.M. Prausnitz, and T.K. Sherwood, The Properties of Gases and
Liquids, 4th ed., (New York: McGraw-Hill, 1977), p. 533.
R.C. Reid, J.M. Prausnitz, and B.E. Poling, The Properties of Gases and
Liquids, 4th ed., (New York: McGraw-Hill, 1987), p. 550.
Solid Thermal Conductivity Polynomial
Thermal conductivity for solid pure components is calculated using the solid
thermal conductivity polynomial. For mixtures, the mole-fraction weighted
average is used.
For pure solids, thermal conductivity is calculated by:
For mixtures:
Linear extrapolation of �i *,s versus T occurs outside of bounds.
Parameter
Name/Element
Symbol Default MDS Lower
Limit
Upper
Limit
Units
KSPOLY/1 a — — — — THERMAL
CONDUCTIVITY
KSPOLY/2, 3, 4, 5 b, c, d, e 0 — — — THERMAL
CONDUCTIVITY,
TEMPERATURE
KSPOLY/6 0 x — — TEMPERATURE
KSPOLY/7 1000 x — — TEMPERATURE
General Pure Component Vapor Thermal
Conductivity
The Aspen Physical Property System has several submodels for calculating
pure component low pressure vapor thermal conductivity. It uses parameter
TRNSWT/4 to determine which submodel is used. See Pure Component
Temperature-Dependent Properties for details.