Conference Publications

Permanent URI for this collection

http://hdl.handle.net/10204/11486

Browse

Browsing Conference Publications by Author "Abe, BT"

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Burst leakage-pressure dependency in water piping networks: Its impact on leak openings
    (IEEE, 2017-09) Adedeji, KB; Hamam, Y; Abe, BT; Abu-Mahfouz, Adnan MI
    In most water distribution systems, an appreciable volume of water is lost through leaking pipes, resulting in financial loss and environmental pollution among others. Thus, water loss constitutes a major challenge to utilities around the world. As water pressure is one of the causes of pipe burst resulting into leakages, pressure control could reduce the possibilities of pipe bursts. Thus, water utilities are keen on reducing the network pressure (to reduce leakages) while still maintaining the necessary pressure to fully satisfy customer demands. In this paper, the effect of pressure-bursts leakage dependency on leaks opening in water pipes using Torricelli mathematical model is investigated. Four different pipe leak openings of circular, rectangular, square and triangular geometries are simulated. Likewise, the probability of pipe breakage/burst due to pressure variations are investigated. The simulation results show that the effect of pressure variation is more pronounced on leak openings with rectangular geometry. Additionally, the characteristic nature of this leakage to pressure dependency is examined. The results also reveal the importance of pipe diameter inclusion in any leakage model. Small diameter pipes are more exposed to pipe burst as the pressure increases.
  • Thumbnail Image
    Item
    Effect of pipe materials on BLE using graph-based integrated hydraulic model
    (International Association of Engineers, 2018-07) Adedeji, KB; Hamam, Y; Abe, BT; Abu-Mahfouz, Adnan MI
    The battle of background leakage estimate (BLE) in water supply networks has been the subject of discussion in the last years. This paper aims to investigate the effect of pipe materials with particular reference to their impact on the BLE in looped water supply networks using a graph-based integrated hydraulic model. In the applications, the hydraulic modelling was carried out through steady-state flow modelling. The model was demonstrated on a water supply network derived from the literature. The results obtained evidence the influence of pipe materials on the background leakage estimation. The effect is more pronounced on very smooth and new cast iron or welded steel pipe while the least effect on BLE is observed when oil cast iron and bricks is considered.
  • Thumbnail Image
    Item
    Pipeline grounding condition: A control of pipe-to-soil potential for AC interference induced corrosion reduction
    (SAUPEC, 2017-02) Adedeji, KB; Abe, BT; Hamam, Y; Abu-Mahfouz, Adnan MI; Shabangu, TH; Jimoh, AA
    The interference effect from high voltage overhead lines on nearby metallic pipelines is a major challenge for utility owners due to the induced AC potentials on metallic pipelines. Nevertheless, numerous mitigation techniques have been proposed in the past to curtail the effect of AC potentials on pipelines. One of these techniques is the use of grounding conditions for the metallic pipelines. In this paper, we present through modelling, the computation and comparison of the various approaches for grounding metallic pipe installed near high voltage overhead lines for AC mitigation purposes. A Rand Water pipeline installed near an Eskom 275 kV transmission line at Strydpan, South Africa was used as a case study. The model simulation results of the studied network show that the pipe grounding condition in which the pipeline isolated at both ends of the parallel region with an insulating flange gives better performance in terms of AC potential reduction. This, in conjunction with other AC mitigation techniques can reduce the level of AC potential to the barest minimum or below a threshold in which AC corrosion possibilities are lower.
  • Thumbnail Image
    Item
    A spreadsheet tool for the analysis of flows in small-scale water piping networks
    (IEEE, 2017-07) Adedeji, KB; Hamam, Y; Abe, BT; Abu-Mahfouz, Adnan MI
    The analysis of water piping system has been presented by several authors in the past and in recent years proposing several solution algorithms. Among the notable methods are the Hardy cross method, linear approximation method, Newton Raphson method and the hybrid method to mention but a few, to solve a system of partly linear, and partly non-linear hydraulic equations. In this paper, the authors demonstrate the use of Excel solver to verify the Hardy Cross method for the analysis of flow in water piping networks. A single-loop water network derived from real situation was used as numerical example and case study. Detailed numerical data are presented to explain the results of the studied network.