Pipe Flow Expert Software Compressible Results Verification - Case 04: Gas Pipeline Outlet Pressure

Reference: Gas Pipeline Hydraulics, 2005, CRC Press, E. Shashi Menon Chapter 2,page 65 Example 15

Pipe Flow Expert File: Case_04_Natural_Gas_Pipeline_Outlet_Pressure.pfe

Problem Description: 

Calculate the outlet pressure in a 15 mile natural gas pipeline, with internal diameter 15.5 inches.  

The gas flow rate is 100 MMSCFD and the inlet pressure is 1000 psi absolute.  

The pipeline efficiency value is 0.92.  

Average gas temperature is 80 °F.  

Gas gravity = 0.6, viscosity = 0.000008 lb/ft-sec. 

Use the CNGA method to calculate gas compressibility factor Z.

The calculation method used for the published data was the Panhandle A equation.

Pipe Flow Expert Parameters:

Fluid Data: Gas specific gravity 0.6 (0.045 lb/ft3), 80 °F, 0.00 psi.g, viscosity 0.0119 centipoise (equivalent to 0.000008 lb/ft-sec).

Pipe Data: Pipeline efficiency = 0.92.

Calculation Method: Panhandle A Isothermal equation, Node Adjust Method.

Standard Atmospheric Model: 60 °F, 14.696 psi.a

Gas Physical Model: Real Gas Model (Ideal Gas Law with compressibility factor calculated using CNGA method).

Result Comparison: 

Commentary: 

The published data and the calculated results compare well.