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Pipeline Systems

Leak Localization in Pipelines via Computational Pipeline Monitoring

[+] Author and Article Information
Kamal A. F. Moustafa

 Department of Mechanical Engineering, United Arab Emirates University, P.O. Box 17555, Al-Ain United Arab Emirateskamalam@uaeu.ac.ae

Yousef Haik, Saud Aldajah, Farag Omar

 Department of Mechanical Engineering, United Arab Emirates University, P.O. Box 17555, Al-Ain United Arab Emirates

J. Pressure Vessel Technol 134(4), 041701 (Jul 27, 2012) (7 pages) doi:10.1115/1.4005859 History: Received June 07, 2010; Revised November 08, 2011; Published July 26, 2012; Online July 27, 2012

Leaks in pipelines are unintentional releases of quantities of products from pipelines into the environment. Leaks contribute to the environmental pollution, promote corrosion and equipment failures, and produce instabilities in the pipeline operation and control. Pipeline leaks are commonly associated with third party damage, corrosion, equipment failures, and errors in pipeline design and operation. Being able to accurately detect the location of leaks is imperative. One objective of this paper is to develop a mathematical model that accounts for the behavior of pressure and flow-rate profiles in leaky pipeline systems. Such a mathematical model is needed to better understand the dynamic behavior of the pipeline and its characteristics and for the detection the leaks. The paper also involves computer simulation of pipeline conditions using the developed mathematical model and Kalman filtering technique. Leak localization is accomplished by scanning the pipeline from the inlet node to the outlet one to find the node at which the minimum residuals are obtained. Simulation results are reported to demonstrate the effectiveness of the proposed leak localization scheme.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Pipeline characterization with N nodes

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Figure 2

Pressure head response at middle node (dimensionless)

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Figure 4

Flow-rate profiles at final time

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Figure 5

Pressure head profiles at final time

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Figure 6

Flow-rate response at the middle node

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Figure 8

Residual average for 10% leak at nodes 26 and 76—pressure head

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Figure 9

Residual average for 10% leak at nodes 26 and 76—flow rate

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Figure 10

Element balance

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Figure 3

Flow-rate response at middle node (dimensionless)

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Figure 7

Pipeline leak and measurement layout with 101 nodes

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