Aalborg Vortex Insertion - Manual (Page 55)

5.3.9.4 Submenu Nat Gas AGA8 Menu
If “Natural Gas” is selected as flowing fluid the following parameters related to
flowing Natural Gas have to be entered:
AGA Density Mode density calculation algorithm can use different input
data based on available by user parameters. User can
make one of the following selections (tabular entry):
- use density of Natural Gas @ reference Temperature
and Pressure (Lb/Ft^3) provided by gas supplier
- use relative density “Gr” of Natural Gas @ reference
Temperature and Pressure (real specific gravity)
Manufacture Density density of Natural Gas @ reference Temperature and
Pressure (Lb/Ft^3) provided by gas supplier
Relative Density relative density “Gr” of Natural Gas @ reference
Temperature and Pressure (real specific gravity)
Molecular Fracture of N
2
(no units)
Molecular Fracture of CO
2
(no units)
Reference Temperature reference Temperature for manufacture or relative
density (deg. F)
Reference Pressure reference Pressure for manufacture or relative
density (PSIA)
5.3.9.5 Submenu Other Gases Menu
If “Other Gas” is selected as flowing fluid the following parameters related to
flowing Gas have to be entered:
Specific Gravity Mode density calculation algorithm can use different
specific gravity data based on available by user
parameters. User can make one of the following
selections (tabular entry):
- use specific gravity as ratio of molecular weight
“G” [(g/mol)/(g/mol)] and compressibility factor
Z @ actual flowing temperature and pressure
- use real specific gravity as ratio of densities @ actu-
al flowing temperature and pressure Gr = (Gas)/
(Air)