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Water 2017, 9(5), 309; doi:10.3390/w9050309

A New Device for Pressure Control and Energy Recovery in Water Distribution Networks

1
Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali (DICAM), Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy
2
Dipartimento di Ingegneria Civile, dell’Energia, dell’Ambiente e dei materiali (DICEAM), Università degli Studi “Mediterranea” di Reggio Calabria, Salita Melissari, 89124 Reggio Calabria, Italy
3
WECONS, Via Agrigento, 67, 90141 Palermo, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Enedir Ghisi
Received: 31 March 2017 / Revised: 18 April 2017 / Accepted: 19 April 2017 / Published: 28 April 2017
View Full-Text   |   Download PDF [12109 KB, uploaded 28 April 2017]   |  

Abstract

The potential energy of the water in Water Distribution Networks (WDNs) usually exceeds the amount needed for delivery and consumption and, at the present time, it is mainly dissipated through Pressure Reducing Valves (PRVs) or Open Water Tanks. The present study suggests the use of a new energy-producing device, a Cross-flow turbine with positive outlet pressure named PRS (Power Recovery System), which can provide the same service as PRVs and water tanks, with additional significant hydropower production. After a short presentation of the PRS, the management rules of the proposed device are laid out, according to two possible modes. In the ‘passive’ mode, the piezometric level downstream of the turbine is fixed at the sought after value, in the ‘active’ mode, the discharge is regulated according to the required value. The design criterion is then presented, based on a simple relationship linking dimensionless numbers. A PRS is finally designed for a typical water distribution network, serving the city of Palermo (Italy). The resulting cost-benefit analysis is compared with a similar one carried out in previous work for a regulation system based on the use of a Pump As Turbine (PAT). The comparison shows the improvement obtained by the use of the PRS, consisting of higher energy production, as well as lower construction and installation costs. View Full-Text
Keywords: turbine; power recovery system; hydropower; water supply network turbine; power recovery system; hydropower; water supply network
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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).

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Sinagra, M.; Sammartano, V.; Morreale, G.; Tucciarelli, T. A New Device for Pressure Control and Energy Recovery in Water Distribution Networks. Water 2017, 9, 309.

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