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Prode Properties
Properties of pure fluids and mixtures,
multiphase equilibria, process simulation

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Excel application example : solve a distillation column

With Prode Properties you can easily solve staged columns with one or more feeds and one or more side streams, this Excel application example shows how to specify inputs and print in Excel a detailed table with results

Load the predefined Excel page, specify the problem and get the results

From Excel menu File->open , in Excel folder (in Prode Properties installation) select the file column.xls

In this page you can define different kind of columns, distillation columns with reboiler and condenser, absorbers etc. with one or more feeds and one or more side streams.

The steps to define a column are easy to follow :

  • define the number of stages
  • define pressure distribution (button and top stage)
  • define stage efficiency
  • define the number of feeds, each feed flow rate and compositions (click on the proper Feed button to access the stream editor), each feed stage (remember that reboiler (if present) is stage 1 and condenser (if present) is stage N, and the liquid fraction per each feed (good practices suggest to adopt a value near 1)
  • Define the number of side streams (if any) , the stage, the type (vapor or liquid flow) and the flow specification
  • Define variables as condenser and reboiler and the related specifications, the procedure allows different specifications including the molar fraction of a component in top or bottom stage

To edit / modify a feed just click on the related feed's button to access the stream's editor

Once the column has been defined it is suggested to verify the input data specifically for inconsistent specifications, if you are sure that all is Ok run the solver (button Solve Column)

The procedure prints a detailed report which includes :

  • the verified errors in mass and energy balance
  • reboiler and condenser duties
  • temperature and pressure in each stage
  • total and component vapor flows in each stage
  • total and component liquid flows in each stage
  • This example shows how Properties can be useful in everyday work, it permits to solve rigorously, easily and quickly many different problems within your preferred applications.

    Technical features overview (Windows version)

    • Entirely written in C++, Microsoft MFC provides Microsoft Windows functionalities.
    • Up to 100 different streams with up to 50 components per stream (user can redefine)
    • Several compilations of chemical data and BIPs are available, the user can add new components and BIPs
      • Proprietary compilation with data on more than 1500 chemicals and 25000 BIPs
      • flexible database format (support for up to 30 different correlations) works with all majour standards including DIPPR.
    • Comprehensive set of thermodynamic models, base version includes
      • Regular
      • Wilson
      • NRTL
      • UNIQUAC
      • UNIFAC
      • Soave-Redlich-Kwong (standard and extended version with parameters calculated for best fitting of vapor pressure, density and enthalpy)
      • Peng-Robinson (standard and extended version with parameters calculated for best fitting of vapor pressure, density and enthalpy)
      • Benedict Webb Rubin (Starling) BWRS
      • Steam Tables IAPWS 95
      • ISO 18453 (GERG 2004)
      • ISO 20765 (AGA model)
      • Lee-Kesler (Plocker) LKP
      • Cubic Plus Association (SRK and PR variants)
      • Hydrates (Cubic Plus Association, Van Der Waals-Platteeuw)
      • additional models as Pitzer, NRTL for electrolyte solutions, PC SAFT (with association contribute), GERG (2008) etc. available in extended versions.
    • van der Waals and complex mixing rules (Huron Vidal, Wong Sandler etc.)
    • Base and Extended (to fit experimental data) EOS parameters.
    • Selectable units of measurement
    • Procedure for solving single phase, two phase, multiphase fluid flow
    • Procedure for solving staged columns
      • Rigorous solution of distillation columns, fractionations, absorbers, strippers...
    • Procedure for calculating temperature / pressure formation of gas hydrates
      • hydrate phase equilibria based on Cubic Plus Association and Van Der Waals-Platteeuw models
    • Procedure for solving polytropic compression with phase equilibria
      • Huntington method for gas phase
      • Proprietary method for solving a polytropic process with phase equilibria
    • Procedure for solving isentropic nozzle (safety, relief valve with single and two phase flow)
      • HEM, Homogeneous Equilibrium
      • HNE-DS, Homogeneous Non-equilibrium
      • NHNE, Non-homogeneous Non-equilibrium
    • Procedure for simulating fluid flow in piping (pipelines) with heat transfer
      • Beggs and Brill and proprietary methods for single phase and multiphase fluid flow with heat transfer
    • Procedure for fitting BIP to measured VLE / LLE / SLE data points (data regression)
    • Procedure for fitting BIP to VLE values calculated with UNIFAC
    • Functions for simulating operating blocks (mixer, gas separator, liquid separator) **
    • Functions for accessing component data in database (the user can define mixing rules)
    • gas / vapor-liquid-solid fugacity plus derivatives vs. temperature pressure composition
    • gas / vapor-liquid-solid enthalpy plus derivatives vs. temperature pressure composition
    • gas / vapor-liquid-solid entropy plus derivatives vs. temperature pressure composition
    • gas / vapor-liquid-solid molar volume plus derivatives vs. temperature pressure composition
    • Flash at Bubble and Dew point specifications and P (or T)
    • Flash at given temperature (T) and pressure (P) multiphase vapor-liquid-solid, isothermal flash
    • Flash at given phase fraction and P (or T), solves up to 5 different points
    • Flash at given enthalpy (H) and P multiphase vapor-liquid-solid, includes adiabatic flash
    • Flash at given enthalpy (H) and T multiphase vapor-liquid-solid, includes adiabatic flash
    • Flash at given entropy (S) and P multiphase vapor-liquid-solid, includes isentropic flash
    • Flash at given entropy (S) and T multiphase vapor-liquid-solid, includes isentropic flash
    • Flash at given volume (V) and P multiphase vapor-liquid-solid, includes isochoric flash
    • Flash at given volume (V) and T multiphase vapor-liquid-solid, includes isochoric flash
    • Flash at given volume (V) and enthalpy (H) multiphase vapor-liquid-solid
    • Flash at given volume (V) and entropy (S) multiphase vapor-liquid-solid
    • Flash at given enthalpy (H) and entropy (S) multiphase vapor-liquid-solid
    • Rigorous (True) critical point plus Cricondentherm and Cricondenbar
    • Complete set of properties for different states
      • gas density
      • vapor density
      • liquid density
      • solid density
      • gas Isobaric specific heat (Cp)
      • vapor Isobaric specific heat (Cp)
      • liquid Isobaric specific heat (Cp)
      • gas Isochoric specific heat (Cv)
      • vapor Isochoric specific heat (Cv)
      • liquid Isochoric specific heat (Cv)
      • gas cp/cv
      • liquid cp/cv
      • Gas heating value
      • Gas Wobbe index
      • Gas Specific gravity
      • gas Joule Thomson coefficients
      • vapor Joule Thomson coefficients
      • liquid Joule Thomson coefficients
      • gas Isothermal compressibility
      • vapor Isothermal compressibility
      • liquid Isothermal compressibility
      • gas Volumetric expansivity
      • vapor Volumetric expansivity
      • liquid Volumetric expansivity
      • gas Speed of sound
      • vapor Speed of sound
      • liquid Speed of sound
      • vapor + liquid (HEM) Speed of sound
      • gas Viscosity
      • vapor Viscosity
      • liquid Viscosity
      • gas Thermal conductivity
      • vapor Thermal conductivity
      • liquid Thermal conductivity
      • gas compressibility factor
      • vapor compressibility factor
      • liquid Surface tension

    Typical applications

    • Fluid properties in Excel, Matlab and other Windows and UNIX (**) applications
    • Thermodynamics, physical, thermophysical properties
    • Process simulation
    • Heat / Material Balance
    • Process Control
    • Process Optimization
    • Equipment's Design
    • Separations
    • Instrument's Design
    • Realtime applications
    • petroleum refining, natural gas, hydrocarbon, chemical, petrochemical, pharmaceutical, air conditioning, energy, mechanical industry