Real gas flow simulation in damaged distribution pipelines

Kostowski, Wojciech; Skorek, J.

doi:10.1016/j.energy.2012.02.076

Cited by 37 publications

(16 citation statements)

References 7 publications

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“…They concluded that because of the returned gas flow from downstream, modeling of the pipe like a reservoir that gas flow discharge from end of it, is not a suitable model. Kostowski and Skorek [26] investigated the flow in the damaged pipes in the natural gas distribution network. They considered the damaged pipe as open side wall in their proposed model.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Correlations for estimating natural gas leakage from above-ground and buried urban distribution pipelines

Ebrahimi‐Moghadam

Farzaneh–Gord

Deymi–Dashtebayaz

2016

Journal of Natural Gas Science and Engineering

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Section: A N U S C R I P Tmentioning

confidence: 99%

Correlations for estimating natural gas leakage from above-ground and buried urban distribution pipelines

Ebrahimi‐Moghadam

Farzaneh–Gord

Deymi–Dashtebayaz

2016

Journal of Natural Gas Science and Engineering

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“…They reported that, increasing the velocity head-losses caused the rate of the outlet mass to reach a constant value [3]. A new approach was developed by Moloudi and Abolfazli Esfahani, estimating the amount of gas release from a straight pipe in transient compressible flow [4]. They investigated some dimensionless gas release parameters to derive the equations from Euler equations [5].…”

Section: Introductionmentioning

confidence: 99%

“…By opening the valve due to the high pressure difference between the pipeline and environment, NG is released into the atmosphere at a high velocity (approaching the speed of sound) and draws out impurities with it. In this study, the purging process is refereed to this action (the second form) [4,6].…”

Section: Introductionmentioning

confidence: 99%

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Natural gas emission incidents simulation and calculation of vent in distribution networks (Case study: Fars Gas Company)

Safavian

Aboosadi

Honarvar

2020

Eurasian Chem. Commun.

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This research study aimed at conducting the numerical simulation of accident consequences of natural gas release. Failure of the pipeline can lead to various outcomes, some of which can pose a significant threat of irretrievable damage to people in the immediate vicinity of the failure location. The area of hazard associated with the damage depends on the mode of pipeline failure, time to ignition, environmental conditions at the failure point, and the meteorological conditions. To make the solution and results more similar to the actual scenario, gas leakage rate from the pipeline fracture was investigated in the steady state flow and transient flow modes were assessed. The numerical results revealed that, as the pressure at the fracture point was equal to the atmospheric pressure, the Mach number was smaller than one. In the pipe model, as the length of the pipe was long and the pressure difference between the inside and outside of the pipe was high, the Mach number tended to one and the gas leak rate to the sound speed. The main source of gas emission was divided into four main sections including, the pressure reducing stations, piping and branching and users' instruments. In this study, the findings were calculated using PHAST software.

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“…Natural gas is a kind of high-quality, efficient, clean energy and raw material. Since the 1970s, the development of natural gas in the world has been accelerated, and the research on gas exploitation, transportation, and storage has received increasing attention [1][2][3][4][5][6][7]. Nowadays, natural gas pipelines account for almost half of the total length of pipelines in the world.…”

Section: Introductionmentioning

confidence: 99%

An EKF-Based Method and Experimental Study for Small Leakage Detection and Location in Natural Gas Pipelines

Hou

Zhu

2019

Applied Sciences

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Small leaks in natural gas pipelines are hard to detect, and there are few studies on this problem in the literature. In this paper, a method based on the extended Kalman filter (EKF) is proposed to detect and locate small leaks in natural gas pipelines. First, the method of a characteristic line is used to establish a discrete model of transient pipeline flow. At the same time, according to the basic idea of EKF, a leakage rate is distributed to each segment of the discrete model to obtain a model with virtual multi-point leakage. As such, the virtual leakage rate becomes a component of the state variables in the model. Secondly, system noise and measurement noise are considered, and the optimal hydraulic factors such as leakage rate are estimated using EKF. Finally, by using the idea of an equivalent pipeline, the actual leakage rate is calculated and the location of leakage on the pipeline is assessed. Simulation and experimental results show that this method can consistently predict the leakage rate and location and is sensitive to small leakages in a natural gas pipeline.

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Real gas flow simulation in damaged distribution pipelines

Cited by 37 publications

References 7 publications

Correlations for estimating natural gas leakage from above-ground and buried urban distribution pipelines

Correlations for estimating natural gas leakage from above-ground and buried urban distribution pipelines

Natural gas emission incidents simulation and calculation of vent in distribution networks (Case study: Fars Gas Company)

An EKF-Based Method and Experimental Study for Small Leakage Detection and Location in Natural Gas Pipelines

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