A commonly adopted assumption in water distribution networks (WDN) hydraulic models is that demand is uniformly distributed along the pipes and that such demand is represented as lumped withdrawals at the two ending nodes of each pipe. It has been recently demonstrated that such assumption can generate large errors in energy balance conservation which potentially undermine the validity of hydraulic analyses performed for both calibration and design purposes. The solution proposed consists of modifying the well known Global Gradient Algorithm by introducing a pipe hydraulic resistance correction factor (i.e. Enhanced GGA). This note proposes an extension of that approach to any exponent n of pipe discharge in head loss model (even different from 2 - Darcy-Weisbach; e.g. Hazen-Williams’). The formulation is also extended to allow describing any flow regime through pipes in order to achieve a more hydraulically consistent WDN modelling. Both advancements are tested on a real case study.
|Autori interni:||GIUSTOLISI, Orazio|
|Titolo:||Advancements on pipe hydraulic resistance correction in WDN analysis|
|Data di pubblicazione:||2009|
|Nome del convegno:||Proceedings of Computer and Control in Water Industry (CCWI 2009)|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|