sph: Entropy, Function of Pressure and Enthalpy

In IAPWS95: Thermophysical Properties of Water and Steam

Entropy, Function of Pressure and Enthalpy

Description

The function sph(p,h,digits=9) returns the water entropy, s [ kJ kg-1 K-1 ], for given p [MPa] and h [ kJ k-1 ].

Usage

sph(p, h, digits = 9)

Arguments

p	Pressure [ MPa ]
h	Enthalpy [ kJ kg-1 ]
digits	Digits of results (optional)

Details

This function calls a Fortran DLL that solves the Helmholtz Energy Equation. in accordance with the Revised Release on the IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use (June 2014) developed by the International Association for the Properties of Water and Steam, http://www.iapws.org/relguide/IAPWS-95.html. It is valid from the triple point to the pressure of 1000 MPa and temperature of 1273.

Value

The Entropy: s [ kJ kg-1 K-1 ] and an Error Message (if an error occur: errorCodes)

Examples

p <- 10.0003858
h <- 977.181624
s_ph <- sph(p,h)
s_ph

IAPWS95 documentation built on Sept. 11, 2023, 5:11 p.m.