Journal Articles

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Browsing Journal Articles by Author "Abe, BT"

Now showing 1 - 5 of 5
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    AC induced corrosion assessment of buried pipelines near HVTLs: A case study of South Africa
    (EMW Publishing, 2018-06) Adedeji, KB; Ponnle, AA; Abe, BT; Jimoh, AA; Abu-Mahfouz, Adnan MI; Hamam, Y
    Metallic pipelines have attendant problems of alternating current (AC) assisted corrosion when installed in the utility corridor with high voltage transmission lines. Research studies in the past and recent years have shown that this corrosion is a primary function of the AC density through the pipe coating defect. While several other AC corrosion risk assessment indices have been proposed, the AC density is regarded as a valuable parameter in assessing pipeline corrosion risk due to AC interference. Also, there exists a threshold value which, if exceeded, guarantees the possibility of pipeline corrosion damage. However, for buried pipelines, monitoring these AC corrosion assessment indices is a major challenge. Therefore, to avoid severe corrosion damage to such pipelines, a corrosion assessment for evaluating the corrosion risk of the pipelines due to AC interference is presented in this paper. The assessment was demonstrated on a buried pipeline in one of the Rand Water sites, South Africa where AC interference is frequent. The overall simulation results yield useful information which may be essential for pipeline operators, most especially Rand Water, South Africa and corrosion engineers for AC corrosion assessment of metallic pipelines installed near transmission lines. The analysis presented in this paper may also be used for the evaluation of a safe position for installing new pipelines near existing power lines right-of-way.
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    GUI-Based AC induced corrosion monitoring for buried pipelines near HVTLs
    (International Association of Engineers, 2018-11) Adedeji, KB; Ponnle, AA; Abe, BT; Jimoh, AA; Abu-Mahfouz, Adnan MI; Hamam, Y
    In this paper, a stand-alone application with graphical user interface (GUI) developed for monitoring AC induced corrosion expectancies of buried pipelines near a high voltage AC transmission line is presented. A Rand water site, South Africa, was used as a case study. The interface was based on estimating the AC induced corrosion risk assessment indices for buried pipelines near existing overhead high voltage transmission lines using Carson’s concept of mutual impedances between both the pipeline and transmission circuits. The GUI was developed using MATLAB software and have been tested to process user input data from field measurements in such site. The developed application permits the evaluation of the AC induced corrosion risk assessment indices and may be particularly useful in the analysis of AC induced potential on buried pipelines.
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    Leakage detection and estimation algorithm for loss reduction in water piping networks
    (MDPI, 2017-10) Adedeji, KB; Hamam, Y; Abe, BT; Abu-Mahfouz, Adnan MI
    Water loss through leaking pipes constitutes a major challenge to the operational service of water utilities. In recent years, increasing concern about the financial loss and environmental pollution caused by leaking pipes has been driving the development of efficient algorithms for detecting leakage in water piping networks. Water distribution networks (WDNs) are disperse in nature with numerous number of nodes and branches. Consequently, identifying the segment(s) of the network and the exact leaking pipelines connected to this segment(s) where higher background leakage outflow occurs is a challenging task. Background leakage concerns the outflow from small cracks or deteriorated joints. In addition, because they are diffuse flow, they are not characterised by quick pressure drop and are not detectable by measuring instruments. Consequently, they go unreported for a long period of time posing a threat to water loss volume. Most of the existing research focuses on the detection and localisation of burst type leakages which are characterised by a sudden pressure drop. In this work, an algorithm for detecting and estimating background leakage in water distribution networks is presented. The algorithm integrates a leakage model into a classical WDN hydraulic model for solving the network leakage flows. The applicability of the developed algorithm is demonstrated on two different water networks. The results of the tested networks are discussed and the solutions obtained show the benefits of the proposed algorithm. A noteworthy evidence is that the algorithm permits the detection of critical segments or pipes of the network experiencing higher leakage outflow and indicates the probable pipes of the network where pressure control can be performed. However, the possible position of pressure control elements along such critical pipes will be addressed in future work.
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    A review of the effect of AC/DC interference on corrosion and cathodic protection potentials of pipelines
    (Praise Worthy Prize, 2018-12) Adedeji, KB; Ponnle, AA; Abe, BT; Jimoh, AA; Abu-Mahfouz, Adnan MI; Hamam, Y
    Pipelines installed in the energy utility corridor with alternating current (AC) or direct current (DC) sources have attendant problem of induced corrosion. In the past years, AC or DC induced corrosion of metallic pipelines has been a major challenge facing pipeline utilities. Nevertheless, considerable research studies have been conducted to appraise the impact of both corrosion types on metallic pipelines. While the mechanism of DC induced corrosion is well established with a level of accuracy, the corrosion due to AC has not been fully covered in the literature. This paper presents a comprehensive review of the research trends in this domain with much emphasis on the corrosion caused by AC. Some of the technical and laboratory research works conducted are also covered. A vision for future research is also identified which may be useful for further studies. The series of investigations conducted revealed that the corrosion of pipelines with a coating defect becomes significant as the AC density increases. In extreme cases, corrosion damage is expected if the AC density increases beyond a certain limit. Furthermore, the proposed cathodic protection potential for protecting pipelines against corrosion is not efficient enough when the pipe is exposed to interference caused by AC. Consequently, research studies and field implementations focusing on the combined effect of AC and DC on pipelines with multi-layer soil analysis would give promote understanding of the problem.
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    Towards achieving a reliable leakage detection and localization algorithm for application in water piping networks: an overview
    (IEEE, 2017-09) Adedeji, KB; Hamam, Y; Abe, BT; Abu-Mahfouz, Adnan MI
    Leakage detection and localization in pipelines has become an important aspect of water management systems. Since monitoring leakage in large-scale water distribution networks (WDNs) is a challenging task, the need to develop a reliable and robust leak detection and localization technique is essential for loss reduction in potable WDNs. In this paper, some of the existing techniques for water leakage detection are discussed and open research areas and challenges are highlighted. It is concluded that despite the numerous research efforts and advancement in leakage detection technologies, a large scope is still open for further research in this domain. One such area is the effective detection of background type leakages that have not been covered fully in the literature. The utilization of wireless sensor networks for leakage detection purposes, its technical challenges as well as some future research areas are also presented. In a general remark, practical application of these techniques for large-scale water distribution networks is still a major concern. In this paper, an overview of this important problem is addressed.