Thermodynamic Properties of Water and Steam (IAPWS-IF97)

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About the Calculators

The Knovel Steam Calculators are based on IAPWS IF-97.

Knovel’s steam calculators provide a full implementation of the 2012 cumulative update to IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam (IAPWS-IF97) by the International Association for the Properties of Water and Steam, as well as IAPWS releases for transport properties and surface tension. The data is presented in the form of a series of calculators, allowing for very fine control of conditions and the resolution of the results. You can choose specific input and output units as desired. As opposed to simple steam tables, the calculators support ranges and increments for temperature, pressure, and quality.

The calculators provide these steam and water properties:

Density
Dynamic viscosity
Enthalpy
Entropy, Internal energy
Isobaric heat capacity
Isochoric heat capacity
Pressure
Specific enthalpy
Specific entropy
Specific internal energy
Specific Isobaric Heat Capacity
Specific Isochoric Heat Capacity
Specific volume
Speed of sound
Surface tension
Temperature
Thermal conductivity
Volume