IAPWS95 (version 1.2.4)

DTh: Density, Function of Temperature and Enthalpy

Description

The function DTh(Temp,h,digits=9) returns the water density, D [ kg m-3 ], for given Temp [K] and h [ kJ kg-1 ] (it may have two solutions for Density).

Usage

DTh(Temp, h, digits = 9)

Value

The Density 1: Density_1 [ kg m-3 ]

The Density 2: Density_2 [ kg m-3 ]

Error Message (if an error occur: errorCodes)

Arguments

Temp

Temperature in Kelvin

h

Enthalpy in [ 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.

Examples

Temp <- 500.
h <- 977.181624
D_Th <- DTh(Temp,h)
D_Th