REFPROP 9.0 has replaced the NIST 12 and 14
databases Version 9.0 expands the capability
of the REFPROP database. New features include:
-
- Additional pure fluids and updated
equations of state and transport equations,
including cyclopentane, R-1234yf, and
R-1234ze(E).
- The number of binary mixtures with
interaction parameters has increased from
303 to 639, including many mixtures of
ethylene, propylene, methanol, ethanol,
toluene, benzene, cyclohexane, sulfur
dioxide, ammonia, dodecane, acetone, and
butylene.
- Expanded support for natural gas
systems, including the addition of the
GERG-2008 mixture model for natural gas
fluids, which includes binary interaction
parameters for the following fluids: argon,
butane, carbon monoxide, carbon dioxide,
decane, ethane, helium, heptane, hexane,
hydrogen, hydrogen sulfide, isobutane,
isopentane, methane, nitrogen, nonane,
octane, oxygen, pentane, propane, and water.
- Convergence along the saturation lines
is now better for complex mixtures due to
new algorithms for finding phase boundaries
and the addition of analytical derivatives
in the calculation of the fugacity.
- Calculation of net and gross heating
values for natural gas systems.
- Additional pure fluid equations can be
loaded in memory that are not included in a
selected mixture.
-
- New plots that show deviations between
the GERG-2008 equation and the AGA-8 natural
gas mixture models.
Version 9.0 includes 105 pure fluids, 5
pseudo-pure fluids (such as air) and mixtures
with up to 20 components:
The program uses the most
accurate equations of state and models currently
available:
-
- High accuracy Helmholtz energy equations
of state, including international standard
equations for water, R134a, R32, and R143a
and equations from the literature for
ethane, propane, R125, ammonia, carbon
dioxide, and others.
-
- High accuracy MBWR equations of state,
including the international standard EOS for
R123.
-
- The Bender equation of state for several
of the "older" refrigerants, including R14,
R114, and RC318.
-
- An extended corresponding states model
for fluids with limited data.
-
- An excess Helmholtz energy model for
mixture properties.
-
- Experimentally based values of the
mixture parameters are available for
hundreds of mixtures.
- The American Gas Association equation
AGA8 for natural gas properties (as an
alternative to the Helmholtz model).
- Viscosity and thermal conductivity are
based on fluid-specific correlations (where
available), a modification of the extended
corresponding states model, or the friction
theory model.
Available properties:
-
- Temperature, Pressure, Density, Energy,
Enthalpy, Entropy, Cv, Cp, Sound Speed,
Compressibility Factor, Joule Thompson
Coefficient, Quality, 2nd and 3rd Virial
Coefficients, 2nd and 3rd Acoustic Virial
Coefficients, Helmholtz Energy, Gibbs
Energy, Heat of Vaporization, Fugacity,
Fugacity Coefficient, Chemical Potential, K
value, Molar Mass, B12, Thermal
Conductivity, Viscosity, Kinematic
Viscosity, Thermal Diffusivity, Prandtl
Number, Surface Tension, Dielectric
Constant, Gross and Net Heating Values,
Isothermal Compressibility, Volume
Expansivity, Isentropic Coefficient,
Adiabatic Compressibility, Specific Heat
Input, Exergy, Gruneisen, Critical Flow
Factor, Excess Values,
dp/dr,
d2p/dr2,
dp/dT, dr/dT,
dr/dp,
and many others.
Windows®-based, graphical user
interface features:
-
- The fluid or mixture, units, reference
state, properties to be displayed, and other
options are specified via pull down menus.
-
- A wide variety of tables - in a
scrollable, spreadsheet style format - may
be calculated, including saturation
properties (with temperature, pressure,
density, enthalpy, entropy, composition, or
quality as the independent variable) and
tables at constant temperature, pressure,
density, volume, enthalpy, or entropy (with
temperature, pressure, or density varied).
-
- Input properties may be read from a
file.
-
- Data in any table can be copied to the
clipboard for export to other programs (such
as spreadsheets).
-
- Data in any table can be plotted.
-
- A wide variety of property diagrams may
be automatically generated, including
pressure-enthalpy and temperature-entropy
diagrams and (for binary mixtures)
temperature-composition and
pressure-composition plots.
-
- User preferences and entire sessions may
be stored for later use.
-
- A fluid search dialog is available to
find fluids that match a certain criteria.
-
- A complete help system is available.
Source code: The FORTRAN subroutines and
associated fluid data files are provided for
those wishing to access REFPROP calculations
from their own applications.
Excel spreadsheets: A
sample spreadsheet is included that demonstrates
how the REFPROP DLL can be linked to Excel. Most
properties that are available in the graphical
interface can also be calculated in the
spreadsheet.
System Requirements: PC running
Windows® 98, 2000,
XP, Vista, Window 7 or similar operating system;
10.0 MB available hard disk space.
|