Search

Consider a PRV placed in pipe HT ht to control the pressure at its downstream node. [Extracted from the article]

The following corrections should be made to the original paper: Step 3 in the "Methodology" section should read: 3. Run the GGA until the sum of all link flow and emitter outflow changes divided by the sum of all link flows and emitter outflows is less than a specified stopping tolerance HT ht . [Extracted from the article]

This paper presents a simple valve simulation method integrable into the global gradient algorithm (GGA), which is widely used in hydraulic analysis of water distribution systems. In the proposed method, valves are treated as pipes whose resistance is adjusted in the course of the GGA iteration to meet the valve setting. This method features a unified approach to pressure control and flow control valves. Comparison tests on example networks have shown that the proposed method computes the same results as an independent optimization-based method in a comparable number of iterations and copes with the cases where EPANET 2 produces incorrect results. The proposed method may easily be integrated into existing GGA-based hydraulic solvers, in particular into that of EPANET 2. [ABSTRACT FROM AUTHOR]