Gas Expansion Factor
Gas expansion factor, abbreviated as \( E_g \), is the change in volume or pressure of a gas as it expands. It is particularly relevant when dealing with compressible fluids, where changes in pressure and temperature significantly affect the volume of the gas.
Gas Expansion Factor Applications
- Pipeline Flow - Determining the flow rate and pressure drop of gases in pipelines.
- Turbomachinery - Analyzing the performance of compressors and turbines.
- Safety Valves - Designing and sizing relief valves to handle expanding gases.
- Chemical Processes - Understanding the behavior of gases in reactors and separators.
Gas Expansion Factor formula |
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| \( E_g \;=\; E_{gi} - [ \; 1 \;/\; 43560 \; A \; h \; n \; ( 1 - S_{wi} ) \;] \; G_p \) | ||
| Symbol | English | Metric |
| \( E_g \) = gas expansion factor | \(cu^3 \;/\; bbl\) | - |
| \( E_{gi} \) = initial gas expansion factor (SCF/bbl) | \(cu^3 \;/\; bbl\) | - |
| \( A \) = drainage area | \(ft^2\) | - |
| \( h \) = thickness | \(ft\) | - |
| \( n \) = porosity | \(dimensionless\) | - |
| \( S_{wi} \) = initial water saturation | \(dimensionless\) | - |
| \( G_p \) = gas produced (SCF) | \(cu^3\) | - |
