Emerson Rosemount 3051S MultiVariable - Page 27

Natural gas AGA No. 8 gross characterization flow
configuration method 1, method 2, and natural gas ISO
12213, physical properties (SGERG 88) flow configuration
Procedure
1. Expand the Gas category.
2. Select AGA No. 8 Gross Characterization Method 1, AGA No. 8 Gross
Characterization Method 2, or ISO 12213, Physical Properties (SGERG 88).
3. Select Next to proceed to the Fluid Composition tab.
4. Enter the required data for the Natural Gas Characterization Method that was
selected in Step 2. Required data for each method is listed in Table 2-3.
Table 2-3: Required and Optional Data for Natural Gas Characterization
Methods
Characterization
method
Required data Optional data
AGA Report No. 8 Gross
Characterization
Method 1
Relative Density
(1)
Mole Percent CO2
Volumetric Gross Heating Value
(2)
Mole Percent CO Mole
Percent Hydrogen
AGA Report No. 8 Gross
Characterization
Method 2
Relative Density
(1)
Mole Percent CO
2
Mole Percent Nitrogen
Mole Percent CO Mole
Percent Hydrogen
ISO 12213, Physical
Properties (SGERG 88)
Relative Density
(1)
Mole Percent CO
2
Volumetric Gross Heating Value
(2)
Mole Percent CO Mole
Percent Hydrogen
(1) Reference conditions for the relative density are 60 °F (15.56 °C) and 14.73 psia (101.56
kPa).
(2) Reference conditions for the molar gross heating value are 60 °F (15.56 °C) and 14.73
psia (101.56 kPa) and reference conditions for molar density are 60 °F (15.56 °C) and
14.73 psia (101.56 kPa).
5. If appropriate, enter the optional data for the Natural Gas Characterization Method
that was selected in Step 2. Optional data for each method is listed in Table 2-3.
6. Enter the Nominal Operating Pressure, then the Nominal Operating Temperature as
the entry blanks come available. Engineering Assistant will automatically fill in
suggested operating ranges. Note that these values may be edited by the user.
7. Select Next. This will open the Fluid Properties tab.
8. Proceed with the steps in Fluid properties.
Ideal gas
The ideal gas option should be used when the fluid behavior can be modeled by the ideal
gas law. This option uses a modified version of the ideal gas law with a constant value of
compressibility. The default value for compressibility is 1.00 but it may be edited by the
user. To use an ideal gas enter in the operating pressure and temperature followed by
either the density, specific gravity, or molecular weight.
Reference Manual Configuration
00809-0100-4803 October 2018
Emerson.com/Rosemount 27