10 F. Horizontal Gas Flow Rate Calculations Back to Main
This
page is used to determine horizontal gas flow using four different equations,
which are listed in Table 10.3 in the book Gas Conditioning and Processing
Volume 1. To calculate the horizontal
gas flow rate, the equation of calculation must be decided. Choose Weymouth,
Panhandle A, Panhandle B, or Fully Turbulent AGA by clicking on and shading the
circle provided for that selection. Once the method of calculation has been
decided the Inlet pressure, Outlet pressure, Pipe length, Pipe inside diameter,
Mean temperature, Compressibility factor, Pipeline Efficiency %, and Relative
density must be entered into their entry space. To do so use the mouse to click
the courser in the entry spaces and input the data. Once this has been done,
select Run to execute the solution.
Inlet
Pressure is the pressure of the gas as it enters the pipe.
Outlet
Pressure is the pressure of the gas as it leaves the pipe.
Pipe
length:
If
the pipe is not on an incline, Pipe length is the total length of the pipe in
the horizontal direction from beginning to end.
If
the pipe is on a incline
L
Y
X
The inside diameter of the pipe is the length from one inner edge of the pipe to another inner edge of the same pipe, on the exact opposite side.
The
Mean temperature is defined in Equation 10.41:
where T1 is the gas inlet temperature; T2
is the gas outlet temperature; Tg is the surrounding temperature.
Compressibility
Factor is a measure of the deviation of the actual relation from the ideal-gas
equation state (PV = nRT). If the gas
compositions are known, Compressibility Factor can be calculated using screen
3C.
The
Pipeline Efficiency % is used to correct inaccuracies due to assumptions.
Gas
relative density is the molecular weight of the gas divided by the molecular
weight of air.