Transient flow in natural gas pipeline – The effect of pipeline thermal model

Abstract

a b s t r a c tOne-dimensional, nonisothermal gas flow model was solved to simulate the slow and fast fluid transients, such as those typically found in high-pressure gas transmission pipelines. The results of the simulation were used to understand the effect of different pipeline thermal models on the flow rate, pressure and temperature in the pipeline. It was found that simplified flow model with steady-state heat transfer term overestimates the amplitude of the temperature fluctuations in the pipeline. This result indicated that unsteady heat transfer model with the effect of heat accumulation in the surroundings of the pipeline should be used to calculate the gas parameters at locations of interest within high-pressure gas transmission pipelines.

Technical Assessment of Isothermal and Non-Isothermal Modelings of Natural Gas Pipeline Operational Conditions

“…However, the above proposed forms of conservation equations in this paper as well as the way of their derivation were different from those proposed by [6] and [7].…”

“…The derivation of the above equations and the equations proposed in [6] and [7] started with the same governing equations and the same idea of using gas mass flow rate instead of gas velocity. However, the above proposed forms of conservation equations in this paper as well as the way of their derivation were different from those proposed by [6] and [7].…”

“…References [6] and [7] proposed new forms of governing equations for compressible gas flow in which mass flow rate was substituted for flow velocity. …”

Effective calculation methods of the gas flow characteristics and offshore gas pipeline glaciation

“…This problem is still greatly relevant to date. A notable contribution to modelling gas flow in pipelines has been made by M. Chaczykowski [1], A. J. Osiadacz [2], O. F. Vasilev, Ye. A. Bondarev, A. F. Voyevodin, and M. A. Kanibolotskii [3], J. F. Helgaker [4], V. I. Zubov, V. N. Koterov, V. M. Krivtsov and A. V. Shipilin [5], L. M. C. Gato and J. C. C. Henriques [6].…”

The Gas Transportation in a Pipeline Network

“…The problems of heat exchange between gas flowing through the pipe and the ground analysed Osiadacz & Chaczykowski (2001), Chaczykowski (2010), Ke &Ti (2000), Tao & Ti (1988). Ke &Ti, 2000 andTao &Ti, 1988 proposed for transient analysis of isothermal gas flow in the pipeline network a new mathematical model based on electrical analogy.…”