Environmentally friendly hybrid solutions to improve the energy and hydraulic efficiency in water supply systems

Ramos, Helena M.; Kenov, Kaloyan N.; Vieira, Filipe

doi:10.1016/j.esd.2011.07.009

Cited by 46 publications

(23 citation statements)

References 3 publications

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“…The energy required to pump and treat water constitutes one of the largest operational costs for water suppliers (Ramos et al 2011;Fayzul et al 2014). Approximately 2-3 % of the world's energy is consumed in water and wastewater operations, i.e., abstraction, treatment, transport, distribution, use, and disposal (Olsson 2012).…”

Section: Introductionmentioning

confidence: 99%

Simulated Annealing in Optimization of Energy Production in a Water Supply Network

Samora

Franca

Schleiss

et al. 2016

Water Resour Manage

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In water supply systems, the potential exists for micro-hydropower that uses the pressure excess in the networks to produce electricity. However, because urban drinking water networks are complex systems in which flows and pressure vary constantly, identification of the ideal locations for turbines is not straightforward, and assessment implies the need for simulation. In this paper, an optimization algorithm is proposed to provide a selection of optimal locations for the installation of a given number of turbines in a distribution network. A simulated annealing process was developed to optimize the location of the turbines by taking into account the hourly variation of flows throughout an average year and the consequent impact of this variation on the turbine efficiency. The optimization is achieved by considering the characteristic and efficiency curves of a turbine model for different impeller diameters as well as simulations of the annual energy production in a coupled hydraulic model. The developed algorithm was applied to the water supply system of the city Lausanne (Switzerland). This work focuses on the definition of the neighborhood of the simulated annealing process and the analysis of convergence towards the optimal solution for different restrictions and numbers of installed turbines.Water Resour Manage

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Section: Introductionmentioning

confidence: 99%

Simulated Annealing in Optimization of Energy Production in a Water Supply Network

Samora

Franca

Schleiss

et al. 2016

Water Resour Manage

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“…However, it is worth mentioning that the feed-in-tariff regulations vary considerably between countries and, for example, in the UK, a micro-hydropower plant (MHP) downstream from any pumping station is not eligible for the subvention [12]. In addition to the abovementioned synergies with the existing WSS facilities, the energy produced may justify the installation of a grid-connected generator or local consumption [13]; the latter provides financial savings by avoiding external consumption and expensive electrical connections [14]. The installation of these systems is highly dependent on the costs associated with the turbine, construction and grid connection [4].…”

Section: Introductionmentioning

confidence: 99%

Energy Recovery Using Micro-Hydropower Technology in Water Supply Systems: The Case Study of the City of Fribourg

Samora

Manso

Franca

et al. 2016

Water

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Abstract:Water supply systems (WWSs) are one of the main manmade water infrastructures presenting potential for micro-hydropower.Within urban networks, local decentralized micro-hydropower plants (MHPs) may be inserted in the regional electricity grid or used for self-consumption at the local grid level. Nevertheless, such networks are complex and the quantification of the potential for micro-hydropower other than that achieved by replacing pressure reducing valves (PRVs) is difficult. In this work, a methodology to quantify the potential for hydropower based on the excess energy in a network is proposed and applied to a real case. A constructive solution is presented based on the use of a novel micro-turbine for energy conversion, the five blade tubular propeller (5BTP). The location of the MHP within the network is defined with an optimization algorithm that maximizes the net present value after 20 years of operation. These concepts are tested for the WSS in the city of Fribourg, Switzerland. The proposed solution captures 10% of the city's energy potential and represents an economic interest. The results confirm the location of PRVs as potential sites for energy recovery and stress the need for careful sensitivity analysis of the consumption. Finally, an expedited method is derived to estimate the costs and energy that one 5BTP can produce in a given network.

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“…This nexus refers to the fact that water and energy are basic needs with similar demands and, consequently, should have an integrated base-management. Even though these are some of the essential goods in modern societies, few authors have presented globalscale water and energy foot-printing analyses (Vieira and Ramos, 2008;Hoekstra et al, 2009;Ramos et al, 2011) being traditionally managed independently (Beaulieu, 2010;Lindström and Granit, 2012;Howe and Mitchell, 2012).…”

Section: Introductionmentioning

confidence: 99%

Energy recovery in SUDS towards smart water grids: A case study

et al. 2013

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An innovative solution for Sustainable Urban Drainage Systems (SUDS).Use of retention ponds to reduce risks of urban flooding while producing energy. Use of recently developed hydropower converters for low heads. Solution to be integrated in future smart water networks for increasing efficiency. Water and energy nexus for sustainable operation towards future smart cities. a r t i c l e i n f o a b s t r a c tThe development of a methodology for urban flood adaptation and energy recovery solutions is resting on the concept of Sustainable Urban Drainage Systems (SUDS) as a measure to reduce risks of urban flooding while fully utilizing the available resources. Flood drainage systems are infrastructures essential in urban areas, which include retention ponds that can be used as water storage volumes to damp floods and simultaneously to produce energy, constituting innovative solutions to be integrated in future smart water grid′s designs.The consideration of urban flooding as a problem caused by excess water that can be harvested and reused is expected to provide a comprehensive representation of a water-energy nexus for future urban areas. The study comprises an optimization of energy recovery in SUDS of a small district area of Lisbon down-town through the use of a low-head hydropower converter.The status-quo solution based on a basin catchment for the average expected runoff is analysed, with influence of the tidal backwater effect of the Atlantic Ocean which causes difficulties to the drainage of excess flow. The methodology used to reach the flow damping and the optimized solution for energy production is presented.

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Environmentally friendly hybrid solutions to improve the energy and hydraulic efficiency in water supply systems

Cited by 46 publications

References 3 publications

Simulated Annealing in Optimization of Energy Production in a Water Supply Network

Simulated Annealing in Optimization of Energy Production in a Water Supply Network

Energy Recovery Using Micro-Hydropower Technology in Water Supply Systems: The Case Study of the City of Fribourg

Energy recovery in SUDS towards smart water grids: A case study

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