Optimization-Based Methodology for Selection of Pump-as-Turbine in Water Distribution Networks: Effects of Different Objectives and Machine Operation Limits on Best Efficiency Point

Abstract Large volumes of water are wasted through leakage in water distribution networks, and early detection of leakages is important to minimize lost water. Pressure sensors can be placed in a network to detect changes in pressure that indicate the presence of a new leak. This study presents a new approach for placing a set of pressure sensors by creating a list of candidate locations based on sensitivity to leaks that are simulated at all potential nodes in a network. The selection of a set of sensors is explored for two objectives, which are the minimization of the number of sensors and the time of detection. The non-dominated sorting genetic algorithm (NSGA-II) is used to explore trade-offs between these objectives. The effect of measurement uncertainty on the selection of sensor locations is explored by identifying alternative non-dominated fronts for different values for sensor error. The evolutionary algorithm-based approach is applied and demonstrated for the C-Town water network.

Download Full-text

Optimal Selection of Pumps As Turbines in Water Distribution Networks

Proceedings ◽

10.3390/proceedings2110685 ◽

2018 ◽

Vol 2 (11) ◽

pp. 685

Author(s):

Francesco Pugliese ◽

Francesco De Paola ◽

Nicola Fontana ◽

Gustavo Marini ◽

Maurizio Giugni

Keyword(s):

Rotational Speed ◽

Water Distribution ◽

Distribution Networks ◽

Operating Conditions ◽

Water Distribution Networks ◽

Small Scale ◽

Optimal Selection ◽

Pressure Regulation ◽

Hydropower Generation ◽

Selection Of

Pumps As Turbines (PATs) can be installed in Water Distribution Networks (WDNs) to couple pressure regulation and small-scale hydropower generation. The selection of PATs in WDNs needs proper knowledge about both the performances of machines available in the market and the operating conditions of the network. In this paper, a procedure for the preliminary selection of a PAT is proposed, based on the design of the main parameters (the head drop and the produced power at the Best Efficiency Point, the impeller diameter and the rotational speed) to both maximize the producible power and regulate the exceeding pressure.

Download Full-text

Optimal Valve Operation for Restoring Functionality of WDN during Critical Events

Environmental Sciences Proceedings ◽

10.3390/environsciproc2020002032 ◽

2020 ◽

Vol 2 (1) ◽

pp. 32

Author(s):

Mirjam Blokker ◽

Cristiana Di Cristo ◽

Annalisa Gentile ◽

Rudy Gargano ◽

Karel van Laarhoven ◽

...

Keyword(s):

Water Distribution ◽

Real Life ◽

Water Distribution Network ◽

Distribution Networks ◽

Water Distribution Networks ◽

Drinking Water Distribution ◽

Water Companies ◽

Valve Operation ◽

Selection Of

Water distribution networks are expected to fulfill the water demand by all consumers and at all times, even during critical scenarios, such as pipe failures. In this work, a methodology is proposed to maximize the quality of service during pipe failures by operating valves. The selection of the valves to operate is done by solving an optimization problem using Gondwana, a generic optimization tool for drinking water distribution networks. Different objective functions and different failure scenarios are investigated, considering a real-life water distribution network. The analysis is performed considering the peak demand condition. The proposed methodology is useful for water companies in managing the operation of their networks during critical scenarios.

Download Full-text