Chapter 10F

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.

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