| dDdTTp {IAPWS95} | R Documentation |
Density Derivative with respect to Temperature, Function of Temperature and Pressure
Description
The function dDdTTp(Temp,p,digits=9) returns the Density derivative with
respect to Temperature, dDdTemp, for given Temp [K] and p [MPa].
Usage
dDdTTp(Temp, p, digits = 9)
Arguments
Temp |
Temperature [ K ] |
p |
Pressure [ MPa ] |
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 derivative with respect to Temp: dD/dTemp [ kg m-3 K-1 ] and an Error Message (if an error occur: errorCodes)
Examples
Temp <- 500.
p <- 10.0003858
dDdTemp <- dDdTTp(Temp,p)
dDdTemp