IAPWS IF-97
Water and Steam Properties
Dynamic Link Library
IAPWS IF-97
Water and Steam Properties
Dynamic Link Library
$2369
- One (1) Installation License
- Royalty-free Distribution
- For Commercial Use
- One-Year Email Support
- Free Minor Upgrades
Requirements
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Windows Versions: Windows 11, Windows 10
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Library available in 32-bit and 64-bit versions.
Features
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Royalty free distribution for unlimited Windows applications.
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Full support of .NET, C++, C# framework development environments.
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Implements the latest mathematical formulation from the IAPWS-IF97 to calculate properties of water and steam.
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Calculates 31 thermodynamic and transport properties of water and steam and 10 partial derivatives.
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More than 400 results combinations from Export Functions to generate steam tables or diagram plots.
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Calculations are valid all over the range of the IAPWS-IF97.
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It allows for 14 combinations of thermodynamic properties to be entered.
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Each function validates against the range of values entered in case of an invalid input or result.
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Includes functions for the SI (metric) and I-P (English) System of Units.
IAPWS-IF97 Water and Steam Properties
Dynamic Link Library
C++ dynamic-linked library (dll) of functions used for the development of Windows applications.
Any Windows client application that supports C++ function imports can make use of this library by including it in its deployment.
High-precision calculations of thermodynamic and transport properties of water and steam based on the latest IAPWS-IF97 formulation and IAPWS releases.
MAIN FEATURES
Royalty free distribution for unlimited Windows applications.
Full support of .NET, C++, C# framework development environments.
64-bit and 32-bit libraries included.
Performs all the calculations implementing the latest mathematical formulations from the IAPWS (International Association for the Properties of Water and Steam) Industrial formulation (Revision 2007).
Allows for 14 different combinations of thermodynamic properties to be entered as input parameters:
Temperature / Pressure
Temperature / Specific Enthalpy
Temperature / Specific Internal Energy
Temperature / Specific Entropy
Temperature / Specific Volume
Temperature / Vapor Fraction
Pressure / Specific Enthalpy
Pressure / Specific Internal Energy
Pressure / Specific Entropy
Pressure / Specific Volume
Pressure / Vapor Fraction
Specific Enthalpy / Specific Entropy
Specific Enthalpy / Specific Volume
Specific Internal Energy / Specific Volume
Supports input parameters and calculation results in both the SI (metric) and the I-P (English) system of units.
For each combination of input thermodynamic properties, it validates the appropriate input values in the valid range of computations.
RANGE OF VALIDITY
The valid range of calculations for thermodynamic properties is defined by the IAPWS (International Association for the Properties of Water and Steam) as shown on Figure 1, together with the correspondent division of regions.
Valid range for the IAPWS-IF97 and regions.
SYSTEM OF UNITS
Thermodynamic variables in the SI (metric) system of units can be entered and/or the calculation results can be displayed in the following units:
Pressure: Pa
Temperature: K
Specific Enthalpy: J/kg
Specific Entropy: J/(kg·K)
Specific Internal Energy: J/kg
Specific Volume: m³/kg
Vapor Fraction: kg/kg
Thermodynamic variables in the I-P (English) system of units can be entered and/or the calculation results can be displayed in the following units:
Pressure: psi
Temperature: °F
Specific Enthalpy: Btu/lbm
Specific Entropy: Btu/(lbm·°R)
Specific Internal Energy: Btu/lbm
Specific Volume: ft³/lbm
Vapor fraction: lb/lb
Thermodynamic and transport properties calculated
Pressure
Temperature
Specific Enthalpy
Specific Entropy
Specific Internal Energy
Specific Volume
Density
Speed of Sound
Dynamic Viscosity
Kinematic Viscosity
Thermal Conductivity
Thermal Diffusivity
Specific Isobaric Heat Capacity
Specific Isochoric Heat Capacity
Isentropic Exponent
Isobaric Cubic Expansion Coefficient
Isothermal Compressibility
Prandtl Number
Vapor Fraction
IAPWS-IF97 Region
Specific Helmholtz Energy
Specific Gibbs Energy
Compression Factor
Relative Pressure Coefficient
Isothermal Stress Coefficient
Joule-Thomson Coefficient
Dielectric Constant
Refractive Index
Surface Tension
Vapor Pressure
Saturation Temperature
Partial derivatives:
Derivate of volume on pressure with constant temperature - (dvdP)T
Derivate of internal energy on pressure with constant temperature - (dudP)T
Derivate of entropy on pressure with constant temperature - (dsdP)T
Derivate of enthalpy on pressure with constant temperature - (dhdP)T
Derivate of volume on temperature with constant pressure - (dvdT)P
Derivate of internal energy on temperature with constant pressure - (dudT)P
Derivate of entropy on temperature with constant pressure - (dsdT)P
Derivate of enthalpy on temperature with constant pressure - (dhdT)P
Derivate of pressure on temperature with constant specific volume - (dPdT)v
Derivate of pressure on specific volume with constant temperature - (dPdv)T
Range of Input/Output Variables (SI)
|
Property |
Valid range |
Units |
|---|---|---|
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Temperature |
273.15 ≤ T ≤ 2273.15 |
K |
|
Pressure |
610 ≤ P ≤ 100.0E6 |
Pa |
|
Specific Enthalpy |
-41.5878 ≤ h ≤ 2810.0E3 |
J/kg |
|
Specific Internal Energy |
-282.7252 ≤ u ≤ 6327.862E3 |
J/kg |
|
Specific Entropy |
-8.5823 ≤ s ≤ 13905.8727 |
J/(kg·K) |
|
Specific Volume |
1.00007E-4 ≤ v ≤ 1719.8658 |
m³/kg |
|
Vapor Fraction |
0 ≤ x ≤ 1.0 |
kg/kg |
Range of Input/Output Variables (I-P)
|
Property |
Valid range |
Units |
|---|---|---|
|
Temperature |
32.0 ≤ T ≤ 3632.0 |
°F |
|
Pressure |
0.088473 ≤ P ≤ 1450.4 |
psi |
|
Specific Enthalpy |
-0.0178795 ≤ h ≤ 3171.5306 |
Btu/lbm |
|
Specific Internal Energy |
-0.12155 ≤ u ≤ 2720.491 |
Btu/lbm |
|
Specific Entropy |
-0.0020498 ≤ h ≤ 3.32136 |
Btu/(lbm·°R) |
|
Specific Volume |
1.601958E-2 ≤ v ≤ 27549.6 |
ft³/lbm |
|
Vapor Fraction |
0 ≤ x ≤ 1.0 |
lb/lb |
References
- Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam, IAPWS (2007).
- Release on the IAPWS Formulation 2008 for the Viscosity of Ordinary Water Substance, IAPWS (2008).
- Release on the IAPWS Formulation 2011 for the Thermal Conductivity of Ordinary Water Substance IAPWS (2011).
- Supplementary Release on Backward Equations for Pressure as a Function of Enthalpy and Entropy p(h,s) to the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam, IAPWS (2001).
- Wagner, W.; Pruß, A.: The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use. J. Phys. Chem. Ref. Data 31, 387-535 (2002).
- Wagner, W.; Kretzschmar, H.-J.: International Steam Tables. Springer, Berlin (2008).
Example of C# .NET app console
Input combinatio: Pressure, Temperature
Example of function implementation in VS 2019
Input combination: Pressure, Temperature
List of Export Functions
Example of Plot Data
Specific Volume as a function of Temperature and Vapor Fraction
Example of Plot Data
Specific Enthalpy as a function of Temperature and Vapor Fraction
Example of Plot Data
Dynamic Viscosity at Saturation line
Example of Plot Data
Sound Velocity at Saturation line
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