scholarly journals Application of Rehabilitation and Active Pressure Control Strategies for Leakage Reduction in a Case-Study Network

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2215 ◽  
Author(s):  
Camillo Bosco ◽  
Alberto Campisano ◽  
Carlo Modica ◽  
Giuseppe Pezzinga
Keyword(s):  
Water Distribution ◽  
Network Performance ◽  
Time Pressure ◽  
Simulation Analysis ◽  
Control Strategies ◽  
Water Distribution Network ◽  
Pressure Control ◽  
Flow Measurements ◽  
Leakage Reduction ◽  
Active Pressure

The paper discusses the results of a simulation analysis to evaluate the potential of rehabilitation measures and active pressure control strategies for leakage reduction in a water distribution network (WDN) in southern Italy. The analysis was carried out by using a simulation model developed under the EPANET-MATLAB environment. The model was preliminarily calibrated based on pressure and flow measurements acquired during a field monitoring campaign in two districts of the WDN. Three different scenarios of leakage reduction including (i) pipe rehabilitation (scenario S1), (ii) implementation of pressure local control (S2), and (iii) introduction of remote real-time pressure control (RTC) (S3) were simulated and compared with the current scenario of network operation (S0). Results of the simulations revealed that a combination of the used strategies can improve network performance by a significant reduction of water leakage. Specifically, 16.7%, 35.0%, and 37.5% leakage reductions (as compared to S0) can be obtained under scenarios S1, S2, and S3, respectively.

scholarly journals Leakage Control and Energy Consumption Optimization in the Water Distribution Network Based on Joint Scheduling of Pumps and Valves

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2969 ◽  
Author(s):  
Yu Shao ◽  
Yanxi Yu ◽  
Tingchao Yu ◽  
Shipeng Chu ◽  
Xiaowei Liu
Keyword(s):  
Energy Consumption ◽  
Water Distribution ◽  
Control Strategies ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Economic Benefits ◽  
Excessive Pressure ◽  
Leakage Reduction ◽  
Energy Consumption Optimization ◽  
Leakage Control

Apart from water quality, leakage control and energy consumption management are the most concerning challenges for water treatment plants (WTPs). The joint scheduling of pumps and pressure reducing valves (PRVs) in the water distribution network can reduce excessive pressure and distribute pressure more evenly, which achieves comprehensive reduction of leakages and energy consumption. Taking into account the main shortcomings of the commonly used methods, such as scheduling pumps or PRVs separately, or optimizing PRV settings when their position is given, etc., this paper has taken the PRV (position and setting) and the working status of variable speed pumps (VSPs) as decision variables and the cost savings contributed by leakage reduction and energy consumption savings as the objective function, which maximized the economic benefits brought by PRV and/or VSP scheduling. A genetic algorithm (GA) was used to optimize the solution under multiple working conditions. The performance of three control strategies (PRV-only scheduling, VSP-only scheduling, and joint scheduling of PRVs and VSPs) are compared to each other based on a small network. Joint scheduling has achieved the best economic benefits in reducing the gross cost (contributed by leakage and energy consumption) of the three control strategies, which results in a leakage reduction of 33.4%, an energy consumption reduction of 25.4%, and a total cost reduction of 33.1%, when compared to the original network, and saving about 1148 m 3 water (7% of the original consumption) and 722 kWh electric energy (25.4% of the original consumption) per day.

scholarly journals Integrated pressure control strategies for sustainable management of water distribution networks

2019 ◽  
Vol 85 ◽  
pp. 06005 ◽  
Author(s):  
Luigi Berardi ◽  
Daniele Laucelli ◽  
Antonietta Simone ◽  
Gianluca C. Perrone ◽  
Orazio Giustolisi
Keyword(s):  
Water Distribution ◽  
Control Strategies ◽  
Integrated Approach ◽  
Pressure Control ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Water Losses ◽  
Leakage Reduction ◽  
Innovative Methodology ◽  
Optimal Setting

Pressure control in urban Water Distribution Networks (WDNs) allows to reduce water losses, delays asset deterioration and makes effective replacement works. This contribution presents an integrated approach to control pressure for leakage reduction that combines a recent strategy for optimal design of district metered areas (DMAs) with optimal setting of pressure reduction valves. DMA design strategy encompasses the possibility of reconfiguring water flows by closing some gate valves at district boundaries, while the optimal setting of PRVs driven by local or remote real time controls improves leakage reduction and reliability of final solution. The integrated approach is implemented into the WDNetXL platform for advanced WDN analysis, planning and management and is demonstrated on a real urban WDN in Southern Italy. As such, this work proposes an innovative methodology while demonstrating its transfer to water utilities and practitioners to support decisions in real-world complex scenarios.

scholarly journals Experimental investigation of leak hydraulics

2012 ◽  
Vol 15 (3) ◽  
pp. 666-675 ◽  
Author(s):  
M. Ferrante ◽  
C. Massari ◽  
E. Todini ◽  
B. Brunone ◽  
S. Meniconi
Keyword(s):  
Distribution Systems ◽  
Water Distribution ◽  
Network Models ◽  
Water Distribution Network ◽  
Experimental Tests ◽  
Pressure Control ◽  
Pipe Material ◽  
Governing Equations ◽  
The One ◽  
Definition Of

In recent decades the hydraulics of leaks, i.e. the definition of the relationships linking the hydraulic quantities in pipes with leaks, has received increasing attention. On the one hand, the definition of the relationship between the leak outflow and the relevant parameters – e.g. the leak area and shape, the pressure inside the pipe and outside the leak, and the pipe material – is crucial for pressure control and inverse analysis techniques. On the other hand, if the effect of the leakage on the governing equations is not taken into account, i.e. the loss of the flow axial momentum is not considered, significant errors can be introduced in the simulation of water distribution systems. In this paper, the governing equations for a pipe with a leak are derived. The basic equations, obtained within different approaches, are presented in a consistent formulation and then compared with the results of some experimental tests. The leak jet angle and other major features of the results are analysed. The estimated values of the parameters can be used in the water distribution network models when pipes with a diffuse leakage are considered.

Robustness of Parameter-Less Remote Real-Time Pressure Control in Water Distribution Systems

2018 ◽  
pp. 449-463
Author(s):  
Philip R. Page ◽  
Adnan M. Abu-Mahfouz ◽  
Olivier Piller ◽  
Matome L. Mothetha ◽  
Muhammad S. Osman
Keyword(s):  
Real Time ◽  
Distribution Systems ◽  
Water Distribution ◽  
Time Pressure ◽  
Water Distribution Systems ◽  
Pressure Control

Holistic planning methodology for long-term design and capacity expansion of water networks

2008 ◽  
Vol 8 (4) ◽  
pp. 481-488 ◽  
Author(s):  
T. T. Tanyimboh ◽  
P. Kalungi
Keyword(s):  
Water Distribution ◽  
Network Performance ◽  
Water Distribution Network ◽  
Capacity Expansion ◽  
Distribution Networks ◽  
Analytic Hierarchy ◽  
Trade Offs ◽  
Repair Costs ◽  
Planning Methodology

The application of the analytic hierarchy process (AHP) to help select the best option for the long-term design and capacity expansion of a water distribution network is described and applied to a sample network. The main criteria used are: reliability-based network performance; present value of construction, upgrading, failure and repair costs; and social and environmental issues. The AHP has been applied elsewhere on various problems, but not on the long-term upgrading of water distribution networks as proposed in this paper. The pipes are sized to carry maximum entropy flows using linear programming while the best upgrading sequence is identified using dynamic programming. The example demonstrates the effectiveness of the AHP as a systematic tool for assessing pareto-optimal designs based on the trade-offs between multiple criteria. The results demonstrate that the cheapest option is not necessarily the best when other factors e.g. performance and socio-environmental concerns are considered in an explicit way.

Leak identification in a water distribution network using sparse flow measurements

2014 ◽  
Vol 66 ◽  
pp. 252-258 ◽  
Author(s):  
Michael Mulholland ◽  
Andrew Purdon ◽  
M. Abderrazak Latifi ◽  
Christopher Brouckaert ◽  
Christopher Buckley
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Flow Measurements
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