Search results for " water supply network."

showing 3 items of 3 documents

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

2017

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 o…

Engineering020209 energy0208 environmental biotechnologyGeography Planning and Development02 engineering and technologyAquatic ScienceBiochemistryTurbineSettore ICAR/01 - Idraulicaturbine; power recovery system; hydropower; water supply networkControl theory0202 electrical engineering electronic engineering information engineeringProduction (economics)HydropowerWater Science and Technologypower recovery systemEnergy recoverywater supply networkbusiness.industryPressure controlMode (statistics)Environmental engineering020801 environmental engineeringPower (physics)hydropowerWater supply networkbusinessTurbineWater
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Optimization of Osmotic Desalination Plants for Water Supply Networks

2016

Water scarcity and the poor quality of water resources are leading to a wider diffusion of desalination plants using the Reverse Osmosis (RO) process. Unfortunately, the cost of a cubic meter of fresh water produced by an RO plants is still high and many efforts are in progress to increase the efficiency of the membranes used in osmotic plants and to limit the energy required by the process. A further reduction of the energy cost could be obtained by an optimal operation of the desalination plant so reducing the hourly energy cost, or by coupling the RO plant with an energy production plant based on direct osmosis (Pressure Retarded Osmosis PRO). The economic viability of the desalination p…

EngineeringEnergy recoveryWaste managementbusiness.industryDesalination020209 energyPressure-retarded osmosisEnvironmental engineeringWater supplyOsmosiDesalination; Osmosis; PAT; Water supply network; Water Science and Technology; Civil and Structural Engineering02 engineering and technologyGeothermal desalinationDesalinationReverse osmosis plantSettore ICAR/01 - Idraulica0202 electrical engineering electronic engineering information engineeringWater supply networkbusinessReverse osmosisPATWater supply networkWater Science and TechnologyCivil and Structural Engineering
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Cross-Flow Turbine Design For Energy Production And Discharge Regulation

2015

Cross-flow turbines are very efficient and cheap turbines that allow a very good cost/benefit ratio for energy production located at the end of conduits carrying water from a water source to a tank. In this paper a new design procedure for a cross-flow turbine working with a variable flow rate is proposed. The regulation of the head immediately upstream the turbine is faced by adopting a shaped semicircular segment moving around the impeller. The maximum efficiency of the turbine is attained by setting the velocity of the particles entering the impeller at about twice the velocity of the rotating system at the impeller inlet. If energy losses along the pipe are negligible, the semicircular …

Engineeringgeographygeography.geographical_feature_categorybusiness.industryMechanical EngineeringInletTurbineSlip factorSettore ICAR/01 - IdraulicaDraft tubeHydraulic headImpellerEnergy production CFD water supply network.Head (vessel)Cross-flow turbinebusinessWater Science and TechnologyCivil and Structural EngineeringMarine engineeringTurbine
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