iapws (version 1.1)

if97_sat: IAPWS-IF97 Equations in Region 4

Description

Compute the pressure and the temperature along the saturated line according to the IAPWS industrial formulation 1997.

Usage

if97_psat(t)
if97_tsat(p)

Value

A numeric vector containing the saturation-pressure (MPa) or the saturation-temperature (K). Return NA for inputs outside of the range of validity.

Arguments

t

a numeric vector giving the temperature values in K.

p

a numeric vector giving the pressure values in MPa.

Author

Jonathan Debove

References

International Association for the Properties of Water and Steam, IAPWS R7-97(2012), Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam.

Examples

# Region 4
format(if97_psat(t = c(300, 500, 600)), scientific = TRUE, digits = 9)
format(if97_tsat(p = c(0.1, 1.0, 10.0)), scientific = TRUE, digits = 9)