Download for FE-Sizer Version 3.0 User`s Manual - Control

Section 9 - Fluid Property Correlations
Delete Row
This button, activated by any of the active Components Buttons, deletes the
highlighted component. Only one component at a time can be deleted in this manner.
OK
Sets up the mixture table and calculates the fluid properties for the specified mixture
or single component fluid.
Cancel
Cancels the Single Component & Multi-Component Fluid Selection dialog box
without calculating the fluid properties.
Help
Displays the help topic associated with the Single Component & Multi-Component
Fluid Selection dialog box.
9.2
Fluid Properties - Pressure and/or Temperature Data Dialog
Once you complete the fluid components selection
of Figure 9.1 and clicked Ok, the Fluid Properties
- Pressure & Temperature Data input dialog
shown in Figure 9-3 is presented. For this dialog
you enter the pressure and temperature which to
calculate the fluid properties.
Figure 9-3
If determining conditions for saturated steam, either the temperature or pressure of the
steam is required for the saturated steam property correlation. You enter the temperatures
and pressures in the units specified.
9.3
Equations-of-State
Each of the equations-of-states have specific applications for estimating fluid properties.
Redlich Kwong
This highly recognized gas and vapor equation of state is applicable for reduced pressures
(P r = P f / P c) and reduced temperatures (T r = T f / T c) greater than 1. This equation generally
provides accurate results when these guidelines are followed.
Soave-Redlich Kwong
The Soave-Redlich-Kwong equation modifies the original Redlich-Kwong gas and vapor
state equation to provide more accurate results for nonpolar molecules at or near saturated
conditions. The user should note that this form of the Redlich-Kwong equation begins to
deviate from actual values of specific volumes for reduced temperatures, T r, greater than 1.
This is because the Soave a parameter was curve fitted to vapor pressure data above
reduced temperature of 1 that does not exist. Therefore, you should not use the SoaveRedlich-Kwong equation at large reduced temperatures.
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