Aspen Physical Property System - Physical Property Models

Linear extrapolation occurs for Cp,i *,s versus T outside of bounds.
Parameter
Name/Element
224 2 Thermodynamic Property Models
Symbol Default MDS Lower
Limit
Upper
Limit
Units
CPSDIP/1 C 1i — x — — MOLE-HEAT-
CAPACITY,
TEMPERATURE
CPSDIP/2,...,5 C 2i, ..., C 5i 0 x — — MOLE-HEAT-
CAPACITY,
TEMPERATURE
CPSDIP/6 C 6i 0 x — — TEMPERATURE
CPSDIP/7 C 7i 1000 x — — TEMPERATURE
DIPPR equation 102 is:
Linear extrapolation occurs for Cp,i *,s versus T outside of bounds.
Parameter
Name/Element
Symbol Default MDS Lower
Limit
Upper
Limit
Units
CPSDIP/1 C 1i — x — — MOLE-HEAT-
CAPACITY,
TEMPERATURE
CPSDIP/2 C 2i — x — — —
CPSDIP/3,4 C 3i, C 4i 0 x — — TEMPERATURE
CPSDIP/6 C 6i 0 x — — TEMPERATURE
CPSDIP/7 C 7i 1000 x — — TEMPERATURE
If C3i or C4i are non-zero or C2i is negative, absolute temperature units are
assumed for elements C1i through C4i. Otherwise, user input temperature
units are assumed for all elements. The temperature limits are always
interpreted in user input units.
(Other DIPPR equations may sometimes be used. See Pure Component
Temperature-Dependent Properties for details.)
NIST ThermoML Polynomial
The equation is:
Linear extrapolation occurs for Cp,i *,s versus T outside of bounds.
Parameter
Name/Element
Symbol Default MDS Lower
Limit
Upper
Limit
Units
CPSTMLPO/1 C 1i — x — — J/K^2/mol
CPSTMLPO/2,...,5C 2i, ..., C 5i 0 x — — J/K^2/mol
CPSTMLPO/6 nTerms 5 x — — —
CPSTMLPO/7 T lower 0 x — — TEMPERATURE