The following new properties have been added:
Mass-based enthalpy, entropy, and density Volume-based enthalpy
Sum of mass and mole flow
Chemical- and Biochemical- (biological) Oxygen demand Henry's constant of a component in a mixture
User Model Enhancements
New user models for binary liquid and vapor diffusion coefficients coefficients (model name = DL0USR and DV0USR, respectively).
New user equation of state model that supports calculations of temperature, pressure and composition derivatives (model name = ESUSR2).
Polymers Enhancements
New copolymer PC-SAFT model with association – ideal for simulating mixtures of polymers and polar or non-polar solvents over a wide range of temperatures and pressures.
New method for true-to-apparent component conversion of polymer properties when an EOS model is used. In previous versions, the method used for true-to-apparent
conversion leads to the wrong results for mixture Gibbs free energy and entropy. The new method insures that all properties calculated by the conversion satisfy the general thermodynamics relationship among the properties. Since Gibbs free energy is the key property in RGIBBS algorithm, this enhancement is critical in improving the reliability of this algorithm.
New routes for liquid molar enthalpy for activity-coefficient based property methods, such as polymer NRTL, that ensures that pure and mixture enthalpies are consistent with each other. These routes also ensure consistency with non-polymers property methods, such as NRTL, when the mixture does not contain any polymer components.
These new routes are used automatically.
Aspen Properties 159
Compatibility Notes
This section describes the differences that you might encounter between Aspen Properties 2006.5 and Aspen Properties 2006. In most cases, previous Aspen Properties input files and backup files are completely compatible with Aspen Properties 2006.5. AspenTech makes every effort to avoid making changes that result in incompatibilities with previous versions.
The changes discussed in this section were necessary to correct problems, to implement new features, or to improve ease-of-use.
The most important areas where you might encounter differences between Aspen Properties 2006.5 and earlier versions are:
Physical Properties
The Redlich-Kister model was calculating activity coefficients incorrectly for systems with 3 or more components. The calculation was corrected in version 2006.5.
The parameter GMUQQ and interaction parameters for the UNIQUAC model for ethylene diamine were incorrect in the pure and binary databanks. These parameters have been fixed.
Aspen Properties Enterprise Database
If Aspen Properties 2006 is installed after Aspen Properties 2006.5 on a computer which did not previously have any form of SQL Server installed, APED does not work correctly for Aspen Properties 2006. This happens because the SQL Express installed by Aspen Properties 2006.5 has new security mechanisms which prevent the Aspen Properties 2006 installation from creating user/password aped/aped. To fix this, open the SQL Express Management Studio and create user aped and give it proper permissions, then re-register the AP06 and NIST06 databases in the Aspen Properties Enterprise Database Manager for Aspen
Properties 2006.
Aspen Properties 160
What’s Fixed
The following issues were fixed in release 2006.5.
Issue number
Issue Description Issue Resolution
CQ00229530
No information in Completion Status dialog when working with the Parameters/UNIFAC Group sheet.
Add additional check to avoid this problem.
CQ00248480
Aspen Properties with Analysis crashes when run again after re-init.
Fixed the crash problem.
CQ00296368
Aspen Plus 2006 Enterprise Database - some binary databanks missing in the GUI when database was created from legacy DFMS inpu.t
Fixed the legacy file conversion utility so that binary databanks and parameters appear in the Aspen Plus GUI.
CQ00039465
Built-in binary parameters for
n-C4OH/n-C5OH for NRTL and UNIQUAC models predict false azeotrope.
Determined a new set of binary parameters for these models that do not predict false azeotrope.
CQ00129336 Missing MUP: severe error or warning in viscosity calcs.
Lower severity level from Severe to Warning when dipole moment is missing for Lucas Viscosity model (vapor).
CQ00205988
Wrong specifications possible on Properties Estimation Pure Component sheet.
The estimation method field is dimmed, until the component ID is selected.
CQ00224203 Physical prop error in Aspen Plus.
Entering real values as integers with more than 10 digits performs correctly.
CQ00247651
Trying to run workshop example but get error due to cost data!.
Tools | Analysis works when there are custom units defined in the simulation. This used to not work properly.
CQ00253294
Poor Binary Parameters for Ethylene-Diamine/Water for the UNIQUAC model.
Determine a new set of UNIQUAC binary parameters.
CQ00256267 Online help prompt for Free Water Option 5 is incorrect.
Fix the prompt to: K-value of water calculated from water-solubility correlation with
correction for unsaturated system and vapor fugacity of water by free water phase property method.
Provide correct prompt: Polymers Plus Initiator Data Bank.
CQ00258064
When Properties Estimation is set to No, incomplete input form is not ignored.
Ignore incomplete specification on the Estimation forms when Properties Estimation is set to No.
Aspen Properties 161 Issue
number
Issue Description Issue Resolution
CQ00258504 Option code 4 for PR-BM property method does not work for volume translation.
Fixed the model so that volume translation works correctly.
Aspen Properties 162 Issue
number
Brief description of the issue
What was done to fix the issue and the new behavior
CQ00267712 Cannot search for
components. by CAS number when the enterprise
databases are enabled.
Enabled search by CAS registry number.
CQ00268773 Activity coefficient
calculation incorrect Redlich-Kister model.
Fix the mixing rules implementation for this model.
CQ00270102 User specified solid heat capacity coefficients for the IKCAPE submodel, but Aspen Plus still issues an error that parameter CPSPO1 is missing.
Fix error checking for this parameter to avoid the erroneous error message.
CQ00276429 Fortran routine gives severe errors in 2006.
Fixed data overwrite problem when user KVL routine modifies the input vapor mole fraction, y.
CQ00283495 Add Input After for ternary parameters.
Documented parameters for entering coefficients for Pitzer electrolyte model's ternary parameter PSI.
CQ00256507 Add new EOS models by user-supplying properties with derivatives (dT, dP, dN and dX).
New user equation of state model that supports derivatives of properties including dT, dP, dN and dX. The new user model name.
CQ00271845 Unifac group count information for triolein is incorrect - incorrect OH group number was used.
Fix the Unifac group count information for triolein in the databank for UFGRP and UFGRPD.
CQ00226898 New routes for liquid enthalpy departure in Polymers Plus.
New routes for liquid enthalpy departure for Polymers Plus that are consistent with non-polymer property methods when used with non-polymer components.
CQ00262381 Implement Copolymer PC-SAFT model.
New PC-SAFT equation of state that can handle homo and co-polymers. The model includes the association effect.
CQ00194558 Fortran errors when regressing GMUFR, if initial estimate is not provided.
Added check to prevent fortran errors.
CQ00202670 CAPE-OPEN Property Package supports
"internalenergy", which is not in the Thermo 1.1 standards.
Remove "internalEnergy". Add "energy", which is in the Thermo 1.0 standards.
CQ00226900 CAPE-OPEN Vapor Pressure calculation call requires pressure specification, which is incorrect according to Thermo 1.0 standards.
Removed the need for pressure specification.
Only temperature is required.
CQ00229297 Fortran errors in prop-set calculations for properties of solids (CISOLID substream)
Fixed the fortran errors.
Aspen Properties 163 Issue
number
Brief description of the issue
What was done to fix the issue and the new behavior
CQ00255298 The regression information for binary parameters from Enterprise Database is misleading.
Fixed the information such that the correct component is displayed for the mole fraction range information.
CQ00257919 RE: Problems with Henry's Law Model in Aspen Plus.
Improve error message when Henry's constants are missing for a solute with all solvents.
CQ00267937 Incorrect kij parameter of SRK. model for n-pentane/i-pentane, resulting in false azeotrope
Set kij = 0 for this pair of components
CQ00283809 Functional Group Definitions for Ruzicka Method
Clarified notation in help for Ruzicka method functional groups.
CQ00260653 Problems with the COSTALD liquid molar volume model:
incorrect checking for saturation pressure and mixing rules for water
Fixed these problems
CQ00265170 Difficult to identify SO2 and SO3 because their aliases are O2S and O3S
Add alternate names for these components:
SO2 and SO3, respectively
CQ00256563 Props Props was not accepting user specified component properties properly. Revised UI and engine to correct.