Optimal Hub Location in Pipeline Networks

1996 ◽  
Author(s):  
Dawn R. Dott ◽  
S. C. Wirasinghe ◽  
Amit Chakma
Keyword(s):  
Natural Gas ◽  
North American ◽  
Gas Pipeline ◽  
Transportation Costs ◽  
Hub Location ◽  
Pipeline Network ◽  
Location Allocation ◽  
The North ◽  
Pipeline Networks ◽  
Gas Plants

This paper discusses optimization strategies and techniques for the location of natural gas marketing hubs in the north American gas pipeline network. A hub is a facility at which inbound and outbound network links meet and freight is redirected towards their destinations. Common examples of hubs used in the gas pipeline industry include gas plants, interconnects and market centers. Characteristics of the gas pipeline industry which are relevant to the optimization of transportation costs using hubs are presented. Proven techniques for solving location-allocation problems are discussed. An outline of the research in process by the authors in the field of optimal gas hub location concludes the paper.

scholarly journals GPU-accelerated hydraulic simulations of large-scale natural gas pipeline networks based on a two-level parallel process

2020 ◽  
Vol 75 ◽  
pp. 86
Author(s):  
Yue Xiang ◽  
Peng Wang ◽  
Bo Yu ◽  
Dongliang Sun
Keyword(s):  
Natural Gas ◽  
Large Scale ◽  
Parallel Simulation ◽  
Simulation Software ◽  
Gas Pipeline ◽  
Processing Unit ◽  
Pipeline Network ◽  
Natural Gas Pipeline ◽  
Pipeline Networks ◽  
Speedup Ratio

The numerical simulation efficiency of large-scale natural gas pipeline network is usually unsatisfactory. In this paper, Graphics Processing Unit (GPU)-accelerated hydraulic simulations for large-scale natural gas pipeline networks are presented. First, based on the Decoupled Implicit Method for Efficient Network Simulation (DIMENS) method, presented in our previous study, a novel two-level parallel simulation process and the corresponding parallel numerical method for hydraulic simulations of natural gas pipeline networks are proposed. Then, the implementation of the two-level parallel simulation in GPU is introduced in detail. Finally, some numerical experiments are provided to test the performance of the proposed method. The results show that the proposed method has notable speedup. For five large-scale pipe networks, compared with the well-known commercial simulation software SPS, the speedup ratio of the proposed method is up to 57.57 with comparable calculation accuracy. It is more inspiring that the proposed method has strong adaptability to the large pipeline networks, the larger the pipeline network is, the larger speedup ratio of the proposed method is. The speedup ratio of the GPU method approximately linearly depends on the total discrete points of the network.

An Overview of the Seismic Verification Analyses Performed for Natural Gas Pipeline Networks

2004 ◽  
Author(s):  
Ch. Botsis ◽  
A. Sariyiannis ◽  
G. Anagnostides ◽  
N. Kokavesis
Keyword(s):  
Natural Gas ◽  
Seismic Response ◽  
Active Fault ◽  
Active Faults ◽  
Lateral Spreading ◽  
Gas Pipeline ◽  
Pipeline Network ◽  
Natural Gas Pipeline ◽  
Pipeline Networks ◽  
Ground Displacements

The purpose of this paper is to present an overview of the various seismic analyses performed and the measures taken to ensure the mechanical integrity of the natural gas pipeline networks in Greece. Design of large pipeline networks in an open countryside is a complicated issue and involves many disciplines and works, such as, preliminary geological investigation, topographical investigation, detailed geotechnical investigation, adjustment of pipeline routing (if necessary) according to the detailed investigation results and finally pipeline stress verification due to stresses induced by seismic loading caused either by soil lateral spreading during a seismic event or by the rupture of active faults. Engineering judgment and previous experience are important to determine the best pipeline routing, however, due to the large seismic events occurring in Greece, measures are always necessary to improve the seismic response of pipeline networks. Loading of buried pipelines, due to earthquake induced permanent ground displacements (active fault rupture and lateral spreading) is displacement controlled. Various analyses were performed to evaluate the maximum ground surface acceleration and its reduction with depth, which control the outcome of the liquefaction potential. The results of the liquefaction analyses were used to compute permanent ground displacements. These displacements as well as the active fault displacements were applied to critical parts of the pipeline network and elasto-plastic analyses were performed to compute the resulting pipeline stresses and strains. Various mitigation measures have been taken to release pipeline stresses, such as changing (where possible) the pipeline routing, widening the pipeline trench in critical areas, using a light-weight backfill material, increasing the pipeline thickness, etc. The paper will present an overview of the various analyses performed and will summarize the measures taken to improve the seismic response of the pipeline network.

Reliability Assessment of Gas Pipelines with Corrosion Defects Based on In-Line Inspection

2016 ◽  
Vol 853 ◽  
pp. 478-482 ◽  
Author(s):  
Ming Fei Li ◽  
Jian Chen ◽  
Zheng Qiang Lei ◽  
Hong Long Zheng
Keyword(s):  
Natural Gas ◽  
Large Scale ◽  
Safety Evaluation ◽  
Calculation Model ◽  
Gas Pipeline ◽  
Small Scale ◽  
Pipeline System ◽  
Pipeline Network ◽  
Natural Gas Pipeline ◽  
Pipeline Networks

As the natural gas pipeline system in China is extremely complex and busy, people are coming to realize that existing system safety evaluation methods, which are premised on single pipelines or small-scale pipeline networks, are in fact not technical and rational enough for assessing the safety of a large-scale pipeline network. Therefore, ideas for ensuring the reliability of a large-scale natural gas pipeline network have recently been proposed. To calculate system reliability, the primary task is assessing the reliability of individual system components, such as pipelines and gas stations. This paper advances a reliability calculation model based on the Monte Carlo simulation for pipelines with corrosion def ects determined through in-line inspection. An example of the calculation method is provided; in this example, the reliability of a particular PetroChina natural gas pipeline project is ascertained in order to offer some experiences and references for pipeline reliability assessors.

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