Optimization of the energy management in water supply systems

2009 ◽  
Vol 9 (1) ◽  
pp. 59-65 ◽  
Author(s):  
F. Vieira ◽  
H. M. Ramos
Keyword(s):  
Water Supply ◽  
Hydraulic System ◽  
High Energy ◽  
Water Supply Systems ◽  
Time Step ◽  
Water Turbine ◽  
Pumping Schedules ◽  
Definition Of ◽  
Hydraulic Simulator ◽  
Supply Systems

Water supply systems frequently present high-energy consumption, which correspond to the major expenses of these systems. Energy costs are a function of real consumption and the daily energy tariff. This paper presents a model of optimization to guarantee the delivery of enough water to populations, for each day. Although, in order to achieve that, energy for pumping is needed, representing the main cost for the companies that operate the systems. The model, developed in MATLAB®, provides the best solution to take in each time step. Simultaneously the population water consumption must be guaranteed, and the hydraulic system restrictions fulfilled. The definition of optimal pumping schedules allows the reduction of operation and maintenance costs associated with pumping energy, as well as the increase of global hydraulic system efficiency. The rules are subsequently introduced into a hydraulic simulator (EPANET), to verify the system behaviour along the simulation period. In addiction, a water turbine is introduced in one of the system's branches. The economical benefits from the generated energy from the water turbine can not be neglected and the wind complementary turbine for pumping supply provides also significant economical savings.

scholarly journals Multiple-steps scenario optimisation for pumping plants activation in water supply systems

2021 ◽  
Author(s):  
Jacopo Napolitano ◽  
Giovanni M. Sechi
Keyword(s):  
Water Supply ◽  
Energy Savings ◽  
Energy Requirements ◽  
Water Supply Systems ◽  
Economic Aspects ◽  
Water Demands ◽  
Definition Of ◽  
Supply Systems ◽  
Modelling Approach ◽  
Strategic Rules

Abstract Economic aspects concerning the high costs related to energy requirements for managing complex water supply systems need a robust strategy, particularly considering the activation of pumping plants. Considering hydrological uncertainties, the definition of strategic rules can ensure energy savings and the well-timed activation of costly water transfers for shortage risk alleviation. The modelling approach has been developed aiming at defining strategic rules of pumps activation thresholds. It considers the need for seasonal variations of activation and the different costs of energy in diverse time slots, according to the usual cost rules adopted by the authorities. Starting with the traditional scenario analysis approach, a new algorithm has been developed considering a multiple-steps scenario optimisation implemented using GAMS interfaced with CPLEX solvers. The results should allow the water authority to establish a robust strategy for pumping activation to guarantee the fulfilment of water demands and to ensure an energy-saving policy.

Building Energy Scenarios for Large Water Pumping Systems

2012 ◽  
Author(s):  
Margarita Gil Samaniego Ramos ◽  
Héctor Enrique Campbell Ramírez
Keyword(s):  
Water Supply ◽  
Large Fraction ◽  
Building Energy ◽  
High Energy ◽  
Performance Criteria ◽  
Semiarid Region ◽  
Water Supply Systems ◽  
Large Water ◽  
Supply Systems

The life quality of the world’s population and its development activities mainly depend on the availability, quantity and quality of fresh water. Water scarcity at many regions around the globe present challenges towards improving efficiency and rationalizing its use. The state of Baja California, México, is located at the northwestern corner of Mexico at a large semiarid region where rain incidence is very low (169 mm annually); thus, its water provision is also scarce. Federal and state governments have made efforts to guarantee water accessibility to its municipalities. The Río Colorado-Tijuana Aqueduct (ARCT) is a large water supply system that provides 5.33 m3/s of water to these cities. Its 6 pumping stations elevate the water 1,061 m through 147 km of pipes, canals and tunnels, and its total installed motor capacity is of 106,000 HP. Pumps are high energy consumers and represent a large fraction of operating costs in water supply systems. The volume pumped by the ARCT in 2010 was of 80.7 million of m3, while consuming 322.7 GWh annually at a cost of 23.8 million dollars. Implementing actions for the saving and efficient use of energy in hydraulic facilities is a worldwide priority to achieve rational water management and therefore national and regional sustainable development. Methodologies that improve energy savings while satisfying system performance criteria should be sought for better performance and management of the water supply systems. For building energy scenarios for such systems, it is necessary to integrate and adapt different methodologies for the simulation and assessment of behavior and performance taking in account hydraulic, electric and economic issues. This paper presents different approaches and results when these methodologies are applied for the case of ARCT.

scholarly journals ENERGY-SAVING ENVIRONMENTAL AUTOMATED WATER SUPPLY SYSTEM FOR A CONSTRUCTION ENTERPRISE

2017 ◽  
Vol 21 (6) ◽  
pp. 60-67
Author(s):  
N. S. Kobelev ◽  
V. N. Kobelev ◽  
W. I. Senzenkow ◽  
S. A. Poliwanowa ◽  
N. A. Satalova
Keyword(s):  
Water Supply ◽  
Energy Saving ◽  
Thermal Protection ◽  
High Energy ◽  
Supply System ◽  
Water Supply System ◽  
Energy Sources ◽  
Water Supply Systems ◽  
Industrial Enterprises ◽  
Supply Systems

The energy saving ecological water supply system is proposed. The system can be implemented both in heat power engineering, in particular in circulating water supply systems for industrial enterprises, and in construction industry where there are heat evolutions produced by equipment and due to technological processes. According to the forecasts of Russia's energy strategy, the production of thermal energy will increase by 22-34 % in 2020. At the same time, it is planned to increase the real heat consumption by 1.4-1.5 times due to reduction of losses in the conditions of high energy saving potential in all energy sectors beginning with production to transportation and rational use of energy sources. The system of housing and utilities is extremely energy intensive, since utility infrastructure is worn out up to 80-90 %. The practical lack of biosphere-compatible technologies for engineering systems design and operation in Russia does not allow providing resource-saving at all stages of full life cycle of a building or a structure. Known studies and proposals based on the research and development decisions of RAASN Research Institute of Building Physics mainly relate to the thermal protection of the shell of a building and are not represented by engineering interconnected systems. Therefore, the development and implementation of measures for the integrated development of utility infrastructure becomes topical. The solution of this problem is related to complex of engineering and technical activities, including thermal protection by increasing thermal resistance of enclosing structures of buildings, upgrading heat and water supply systems, using non-traditional energy sources.

scholarly journals Safety Problems of Small Water Supply Systems

2016 ◽  
Vol 37 (1) ◽  
pp. 51-72 ◽  
Author(s):  
Barbara Tchórzewska-Cieślak ◽  
Katarzyna Pietrucha-Urbanik ◽  
Dawid Szpak
Keyword(s):  
Risk Management ◽  
Water Supply ◽  
Safety Assessment ◽  
Poor Quality ◽  
Supply System ◽  
Water Supply Systems ◽  
Small Water ◽  
Consumer Safety ◽  
Definition Of ◽  
Supply Systems

Abstract The paper presents issues related to risks associated with the operation of small water supply systems on the background of water consumer safety assessment made on the basis of risk analysis. Definition of water consumer safety loss as a risk associated with the water consumption of poor quality or water lack was proposed. For this purpose, a three-parameter matrix is implemented with the parameters of the probability of a representative accident scenario, the losses of the water consumers and their protection. Risk management, together with the implementation of protective barriers of small water supply system against threats is a fundamental condition for the continued operation of the system.

scholarly journals Robust optimization methodologies for water supply systems design

2012 ◽  
Vol 5 (1) ◽  
pp. 173-192 ◽  
Author(s):  
J. Marques ◽  
M. C. Cunha ◽  
J. Sousa ◽  
D. Savić
Keyword(s):  
Water Supply ◽  
Robust Optimization ◽  
Optimization Problems ◽  
Systems Design ◽  
Well Being ◽  
Operating Conditions ◽  
Water Supply Systems ◽  
Water Mains ◽  
Hydraulic Simulator ◽  
Supply Systems

Abstract. Water supply systems (WSSs) are vital infrastructures for the well-being of people today. To achieve good customer satisfaction the water supply service must always be able to meet people's needs, in terms of both quantity and quality. But unpredictable extreme conditions can cause severe damage to WSSs and lead to poorer levels of service or even to their failure. Operators dealing with a system's day-to-day operation know that events like burst water mains can compromise the functioning of all or part of a system. To increase a system's reliability, therefore, designs should take into account operating conditions other than normal ones. Recent methods based on robust optimization can be used to solve optimization problems which involve uncertainty and can find designs which are able to cope with a range of operating conditions. This paper presents a robust optimization model for the optimal design of water supply systems operating under different circumstances. The method presented here uses a hydraulic simulator linked to an optimizer based on a simulated annealing heuristic. The results show that robustness can be included in several ways for varying levels reliability and that it leads to more reliable designs for only small cost increases.

scholarly journals Robust optimization methodologies for water supply systems design

2012 ◽  
Vol 5 (1) ◽  
pp. 31-37 ◽  
Author(s):  
J. Marques ◽  
M. C. Cunha ◽  
J. Sousa ◽  
D. Savić
Keyword(s):  
Water Supply ◽  
Robust Optimization ◽  
Optimization Problems ◽  
Systems Design ◽  
Well Being ◽  
Operating Conditions ◽  
Water Supply Systems ◽  
Water Mains ◽  
Hydraulic Simulator ◽  
Supply Systems

Abstract. Water supply systems (WSSs) are vital infrastructures for the well-being of people today. To achieve good customer satisfaction the water supply service must always be able to meet people's needs, in terms of both quantity and quality. But unpredictable extreme conditions can cause severe damage to WSSs and lead to poorer levels of service or even to their failure. Operators dealing with a system's day-to-day operation know that events like burst water mains can compromise the functioning of all or part of a system. To increase a system's reliability, therefore, designs should take into account operating conditions other than normal ones. Recent approaches based on robust optimization can be used to solve optimization problems which involve uncertainty and can find designs which are able to cope with a range of operating conditions. This paper presents a robust optimization model for the optimal design of water supply systems operating under different circumstances. The model presented here uses a hydraulic simulator linked to an optimizer based on a simulated annealing heuristic. The results show that robustness can be included in several ways for varying levels reliability and that it leads to more reliable designs for only small cost increases.

scholarly journals Sustainable Water Supply Systems Management for Energy Efficiency: A Case Study

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5101
Author(s):  
Izabela Zimoch ◽  
Ewelina Bartkiewicz ◽  
Joanna Machnik-Slomka ◽  
Iwona Klosok-Bazan ◽  
Adam Rak ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Water Supply ◽  
Energy Management ◽  
Water Demand ◽  
High Energy ◽  
Water Supply Systems ◽  
Systems Management ◽  
Hydraulic Models ◽  
Supply Systems

A prerequisite for achieving high energy efficiency of water supply systems (understood as using less energy to perform the same task) is the appropriate selection of all elements and their rational use. Energy consumption in water supply systems (WSS) is closely connected with water demand. Especially in the case of oversized water supply systems for which consumers’ water demand is at least 50% less than previously planned and flow velocity in some parts of the system is below 0.01 m·s−1, this problem of excessive energy consumption can be observed. In the literature, it is difficult to find descriptions and methods of energy management for such a case. The purpose of this study was both an evaluation of the current demand of an oversized WSS and a preliminary technical analysis of the possibility for energy saving. Solutions are presented that resulted in improvements in energy management, thus increasing energy efficiency. The conducted analyses indicate the wide use of numerical, hydraulic models, among others, for the needs of the sustainable oversize water supply systems management in order to improve energy efficiency. Those simulations only give energy consumption results as a first step in the process of decision-making for the modernization process, in which investment costs should be taken into account as a second step. Thus, this paper emphasizes the crucial role of hydraulic models as a good analytical tool used in decision support systems (DSS), especially for large, oversized water supply systems.

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