JTcTD: Joule-Thomson Coefficient, Function of Temperature and...

In IAPWS95: Thermophysical Properties of Water and Steam

Joule-Thomson Coefficient, Function of Temperature and Density

Description

The function JTcTD(Temp,D,digits=9) returns the Joule-Thomson coefficient for given Temp [K] and D [kg/m3].

Usage

JTcTD(Temp, D, digits = 9)

Arguments

Temp	Temperature [ K ]
D	Density [ kg m-3 ]
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. The temperature change produced during a Joule-Thomson expansion is quantified by the Joule-Thomson coefficient, which may be positive (cooling) or negative (heating).

Value

The Joule-Thomson coefficient and an Error Message (if an error occur: errorCodes)

Examples

Temp <- 500.
D <- 838.025
JT <- JTcTD(Temp,D)
JT

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