Correlation 96
- Last UpdatedOct 03, 2024
- 3 minute read
The following table lists the identification numbers of this correlation with respect to some well-known sources of thermodynamic data.
|
Source |
Correlation Number |
|---|---|
|
SimSci |
96 |
|
PPDS |
- |
|
DIPPR 801 |
- |
|
NIST TDE |
- |
|
DECHEMA IK-CAPE PPDX |
- |
The equation has the following form:
The C4 coefficient must be less than Tmin.
Modification for specific heat in AVEVA Process Simulation
In the Component Data section of the Fluid Editor, AVEVA Process Simulation shows temperature-dependent correlations for specific heat instead of for enthalpy.
When you enter correlation coefficients for specific heat in the Fluid Editor, you
enter values for the derivative (specific heat) form of the correlation (
).
However, AVEVA Thermodynamic Data Manager (TDM) shows temperature-dependant correlations for enthalpy, not specific heat. Therefore,
when you are specifying the temperature-dependent properties in TDM, you see and enter
the correlation coefficient values for the integrated (enthalpy) form of the equation
(
). When you specify the correlation coefficient values in TDM, you should take care
to follow the correct coefficient mapping between the AVEVA Process Simulation coefficients () and the TDM coefficients (). See Example of coefficient mapping between AVEVA Thermodynamic Data Manager and AVEVA
Process Simulation for more information.
For most temperature-dependent property correlations, we set the constant of integration
for the enthalpy form (typically 
) to zero. However, this correlation does not include a constant of integration. Therefore,
we can use a one-to-one mapping between the integrated and derivative coefficients
( ≘ ) to get matching calculation results in both AVEVA Process Simulation and TDM.
The following equation shows the derivative form of this correlation:
The following equations show the coefficient mapping between the integrated and derivative forms of the correlation:
Usage
We recommend that you use this correlation to calculate only the following properties:
-
Liquid Enthalpy
-
Liquid Specific Heat Capacity
For ions, we do not calculate the liquid specific heat capacity. Instead, the calculated property is the partial molar heat capacity at infinite dilution.