Fxiapws_If97_C - Spirit flow-x Function Reference

fxIAPWS_IF97_C

Description
The function calculates the density and enthalpy of steam and water according to AIPWS-IF97 in US
Customary units.
IAPWS-IF97 defines calculations for 5 regions as shown in the picture below.
References

Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic
Properties of Water and Steam, August 2007.
Boundaries
The IAPWS Industrial Formulation 1997 consists of a set of equations for different regions which cover
the following range of validity:

32 ≤ T ≤ 1472 °F p ≤ 14500 psia

1472 ≤ T ≤ 3632 °F
Region 1: Water
Region 2: Superheated steam
Region 3: Water
Region 4: Saturation line (saturated steam / water)
Region 5: Superheated steam
p ≤ 7250 psia
Flow-X─ Function Reference
Flow-X General functions - fxIAPWS_IF97_C
4-207