Network modelling and prediction of retrograde gas behaviour in natural gas pipeline systems

Abstract

As retrograde gases are transported through pipeline systems, retrograde condensation may occur. Gases expand during pipe transportation due to pressure losses, causing the gas to reach its saturation point and condensate liquids. The presence of this additional liquid phase is responsible for additional pressure losses in natural gas surface production systems. Gases and liquids have markedly different routing behavior when moving

Heat Transfer and Phase Change Characterization of Multicomponent Vapor/Condensation Stratified Flow in a Hydrocarbon Pipeline

“…The pressure drop, liquid height, and temperature field included in the solutions could match well with the experimental data. However, although the EOS (equation of state) was utilized in previous one-dimensional (1D) models to calculate the phase fraction, ,− the flow rate, temperature, and pressure were not coupled with the varying liquid level.…”