Next Article in Journal
Flow Patterns in an Open Channel Confluence with Increasingly Dominant Tributary Inflow
Previous Article in Journal
Combined ICESat and CryoSat-2 Altimetry for Accessing Water Level Dynamics of Tibetan Lakes over 2003–2014
Article Menu

Export Article

Open AccessArticle
Water 2015, 7(9), 4701-4723; doi:10.3390/w7094701

Pressure-Discharge Law of Local Tanks Connected to a Water Distribution Network: Experimental and Mathematical Results

Faculty of Engineering and Architecture, University of Enna "Kore", Cittadella Universitaria, Enna-94100, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Andreas Angelakis
Received: 7 July 2015 / Accepted: 22 August 2015 / Published: 28 August 2015
View Full-Text   |   Download PDF [2537 KB, uploaded 28 August 2015]   |  

Abstract

In many Mediterranean countries, users store water resources in private tanks, which are typically located on rooftops. These local reservoirs are generally connected directly to the water distribution network (WDN). This installation scheme causes a disconnection of the WDN from the users, and thus, the users’ water supply is no longer linked to their consumption, which changes the network operating conditions from the designed conditions. For WDNs characterized by the presence of several private tanks, specific models have to be developed to correctly simulate the operation of the WDN while accounting for reservoirs located between the hydraulic network and users. Some mathematical models that are able to reproduce the tank emptying/filling cycles have already been developed, which combine a tank continuity equation with a float valve emitter law. In the present work, a new emitter law is proposed that improves the predictability of actual models. The new formulation takes into account the variation of the emitter coefficient and of the discharge area during the phases of the filling process of private tanks. Specifically, hyperbolic tangent laws were adopted. A comparison between the proposed mathematical model and the experimental data demonstrated the ability of the new law to estimate the flow discharging into private tanks independently of the float valve branch and of the pressure in the network. The developed model can easily be implemented in hydrodynamic models to take private tanks into account. View Full-Text
Keywords: tank modeling; discharge law; water distribution network; experimental pipe network tank modeling; discharge law; water distribution network; experimental pipe network
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

De Marchis, M.; Milici, B.; Freni, G. Pressure-Discharge Law of Local Tanks Connected to a Water Distribution Network: Experimental and Mathematical Results. Water 2015, 7, 4701-4723.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top