| DTh {IAPWS95} | R Documentation |
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)
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.
Value
The Density 1: Density_1 [ kg m-3 ]
The Density 2: Density_2 [ kg m-3 ]
Error Message (if an error occur: errorCodes)
Examples
Temp <- 500.
h <- 977.181624
D_Th <- DTh(Temp,h)
D_Th