IAPWS-IF97
Water and Steam Properties
Dynamic Link Library
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.
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.
Thermodynamic variables in the SI (metric) system of units can be entered and/or the calculation results can be displayed in the following units:
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:
Partial derivatives:
Property |
Valid range |
Units |
---|---|---|
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 |
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 |
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