IAPWS-IF97
Water and Steam Properties
MATLAB Functions Library
IAPWS-IF97 Water and Steam Properties
MATLAB Functions Library
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:
Thermodynamic and transport properties for two-phase functions calculate all the properties shown above for results in region 4 of the IAPWS-IF97 Formulation (excluding partial derivatives), and the same properties for the Saturated Liquid State and Saturated Vapor States.
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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