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What's New for ESP 8.0?

The following is a list of new features and database updates for ESP 8.0
Return to Support Center Last Updated April 29, 2008

What's New?
  
  • Numerical Engine
    • MSE: Vapor-Vapor equilibrium reactions are now supported (only when no liquid phase is present)
    • MSE: Solid-Vapor equilibrium reactions are now supported (sublimnation)
    • A new initializer based on Gibbs minimization has been implemented. A speed increase of over 8x has been measured for very large models
    • MSE: Pseudocomponents are now available in MSE
    • The number of pseudocomponents have been increased to 100
    • MSE: The activity model was modified to handle very concentration solutions at elevated temperatures.
    • Bubble point and Dew point caluclations have been improved.
    • The vapor phase predictions based on SRK were updated to protect against false answers.
    • Addition of new feature to predictably calculate mass-transfer coefficients for packed-columns. This is an add-on to the exiting unit operations
    • Added the ability to supply a user added subroutine for calculation of mass-transfer coefficients for columns. The default estimations are based on Billet and Schultes 1993
    • Gas phase Thermal Conductivity and Viscosity have been added as properties. The following vapor phase properties were added to the databook to support these calculated properties
    • MSE: A feature was added so you can specify which stream in a separate block will actually contain the "Organic" stream. With MSE, an ambiguity exists for non-aqueous streams when assigning the streams to the liquid and organic outputs. You can now specify the concentration of a species which will key the assignment of the streams.
    • The mass-transfer column was modified to become a single stage.
    • The theoretical height of a packed stage can now be entered and the diameter automatically determined for packed columns.
    • A restart capability has been added. The process is saved every 15 minutes of elapsed (computer) time. This way if a crash occurs (such as a forced reboot during an operating system patch) your run is saved and can be restarted normally.

     

  • The OLI Databases have been massively updated

 

  • Data Regression Program
    • Heat Capacity and Density can now be regressed
    • 100 simultaneous parameters can be regressed
    • The equilibrium line length was increased to 150 characters.

     

  • Reaction Kinetics
    • There is now no need to specify a fake reactive solid in reaction kinetics. The inflow amount is assumed to be the reactive species.
    • Added a facility to constrain forward and reverse rates of elementary homogenous reactions using the equilibrium constants (i.e., Keq = kf/kr)

 

  • The MIXSOL database is no longer supported
    • The MIXSOL database was the hydrogen ion based mixed solvent electrolyte database. This thermodynamic framework was no sufficent to reproduce all the thermodynamic properties we now require. This database was retained in version 7.0 until all the transport properties were migrated to the hydronium ion framework.

     

  • TEAR Streams have been improved
    • A trace amount value has been added. The default is 1E-06 mole fraction. Values below this amount will be ignored in the recycle calculation.
    • The NEWTON method of converging recycles has been updated to accelerate the guess if small guesses were resulting in small changes in the tear stream.

     

  • General
    • The security programs were updated to work with Microsoft XP/64 and Vista

 

 
 

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