Extending the Global-Gradient Algorithm to Solve Pressure-Control Valves
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VIEW THE REPLYPublication: Journal of Water Resources Planning and Management
Volume 146, Issue 8
Abstract
This work introduces two novel methods to the solution of water distribution networks equipped with pressure-control valves based on the global-gradient algorithm (GGA). One method, which can be viewed as an extension of that used to estimate the variable speed coefficient of variable speed pumps, leads to a nonsymmetric system to be solved at each iteration by introducing a new unknown (the head loss at the valve) and imposing the head at the controlled node. The second method maintains the symmetry of the system to be solved by imposing the head at the controlled node, removing the pipe equipped with the valve, and adjusting the mass-balance equation in the other node of the removed pipe. The performances of the proposed methods were analyzed on four case studies, and the results were also compared to those of EPANET 2 in terms of hydraulic accuracy and efficiency.
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Data Availability Statement
Data and code generated or used during the study are available from the corresponding author by request.
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Published In
Journal of Water Resources Planning and Management
Volume 146 • Issue 8 • August 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: May 31, 2019
Accepted: Feb 10, 2020
Published online: May 22, 2020
Published in print: Aug 1, 2020
Discussion open until: Oct 22, 2020
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