TVP and RVP Conditions
Access (two separate windows):
Problem TVP and RVP Conditions Window
Use this window to set the values for the current simulation.
On the Input menu, select Units of Measure. This opens the Default Units of Measure for Problem Data Input window.
Then click the TVP and RVP Conditions button.
Global Default for TVP and RVP Conditions Window
Use this window to set default values for use in this and subsequent simulations.
On the Options menu, select Units of Measure Lists to open the Units of Measure Library window.
Highlight a named system of units in the list box. Then,
Click the EDIT button to open the Library Units of Measure window.
Click the TVP and RVP Conditions button
Description
These windows specify the True vapor pressure (TVP) temperature basis and the Reid vapor pressure (RVP) calculation method.
The values are only used to perform TVP and RVP calculations in the simulation. They are not used when TVP and RVP calculations are omitted.
Note that different conditions can be specified for each Unit of Measure (UOM) set defined in the Units of Measure Library. The global default is automatically selected for all the simulation problems by the default UOM set selected for input data through the global Default Sets of Units of Measure Window. These defaults can be overridden for an individual problem using the Problem Default Units of Measure for Input Data.
Usage
TVP Temperature Basis
Enter the temperature that is to be used as the basis for computing the true vapor pressure. The default value is 100 F.
RVP Calculation Method
Select one of the following Reid vapor pressure calculation methods:
API - Naphtha : This is the PRO/II default method which calculates RVP from the API Data Book Figure 5B1.1.
API - Crude : Calculates RVP from the API Data Book Figure 5B1.2
ASTM-D323-73 : Calculates RVP using the ASTM D323-73 rigorous simulation procedure.
ASTM-D323-82 : Calculates RVP using the ASTM D323-82 rigorous simulation procedure. This method requires the presence of both air and water in the component list.
ASTM-D323-94: Calculates RVP using the ASTM-D323-94 rigorous simulation procedure.
ASTM-D4953-91 : Calculates RVP using the ASTM D4953-91 rigorous simulation procedure. It is intended to provide a consistent method for handling gasoline oxygenates. This method requires air in the component list.
ASTM-D5191-91 : Calculates RVP using the ASTM D5191-91 rigorous simulation procedure. This method requires air in the component list.
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