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Mantova, Italy

Ferrante M.,University of Perugia | Pedroni M.,TeaAcque Srl | Brunone B.,University of Perugia | Meniconi S.,University of Perugia | And 2 more authors.
Procedia Engineering | Year: 2014

Variable speed pumps (VSPs) are widely used in water distribution systems (WDSs). They can increase the efficiency of the system and reduce the energy consumptions, when the functioning conditions move away from those used for the design. Affinity laws allow to model the characteristic curve of VSPs, in terms of dimensionless flow, head and power. Efficiency of the VSPs can also be predicted, although the effects of the variation in the rotation speed can be questioned. In this paper, the experimental data acquired by TeaAcque at the Mantova Casale pumping station are interpreted by means of the dimensionless equations derived by the affinity laws. The measured "wire to water" efficiency of the system is compared to the theoretical one. © 2013 The Authors.

Capponi C.,University of Perugia | Ferrante M.,University of Perugia | Pedroni M.,TeaAcque Srl | Brunone B.,University of Perugia | And 3 more authors.
Drinking Water Engineering and Science | Year: 2014

Pump speed, input power, pressure and discharge data are analyzed for evaluating functioning conditions of Casale pumping station in Mantova, Italy, managed by TeaAcque. A model based on the affinity laws is used to simulate the behavior of the installed variable speed pumps. Quadratic and cubic polynomial curves are used to fit the pump data given by the affinity laws. Such curves allow predicting the efficiency when the functioning conditions change. The relationship between the rotation speed and the efficiency is also derived. © 2015 Author(s).

Meniconi S.,University of Perugia | Brunone B.,University of Perugia | Ferrante M.,University of Perugia | Capponi C.,University of Perugia | And 3 more authors.
Procedia Engineering | Year: 2014

In this paper the possibility of using transients to survey a complex transmission system in the city of Mantova, Italy is explored. Transients are generated by pump trip, and the pressure signal is acquired immediately downstream of the pumping station. The pressure signal is analyzed by the wavelet transform to locate the main singularities and evaluate the pressure wave speed of the main pipe. Then a lagrangian model is carried out to evaluate the causes of experimental pressure variations. The comparison between experimental and numerical traces allows checking the efficaciousness of the procedure and diagnosing the network. © 2014 The Authors.

Alvisi S.,University of Ferrara | Ansaloni N.,TeaAcque Srl | Franchini M.,University of Ferrara
Civil Engineering and Environmental Systems | Year: 2015

This study presents a ‘top-down’ procedure for generating synthetic time series of hourly nodal water based on the application of disaggregation models already presented in the literature in the field of hydrology. More specifically, a parametric and a nonparametric disaggregation model are compared to assess their performance in reproducing, on a nodal level, the main statistics of the time series of historically observed water demands. Moreover, with regard to the nonparametric model, a variant of the original formulation is proposed with the aim of improving the ability to reproduce the lag–1 temporal correlations of the water demand time series generated by disaggregation. The proposed procedures were evaluated with reference to a case study based on a time series of the water demands of 21 users of the water distribution system of the town of Milford (Ohio). The results obtained showed that both the parametric and nonparametric models enable water demand time series to be generated which are statistically similar to the time series observed, thus representing a valid tool for generating synthetic series of nodal water demands from a spatially aggregated time series using a top-down approach. © 2015 Taylor & Francis

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