scholarly journals Modeling and Simulation of a Hydraulic Network for Leak Diagnosis

2018 ◽  
Vol 23 (4) ◽  
pp. 70 ◽  
Author(s):  
José-Roberto Bermúdez ◽  
Francisco-Ronay López-Estrada ◽  
Gildas Besançon ◽  
Guillermo Valencia-Palomo ◽  
Lizeth Torres ◽  
...  

This work presents the modeling and simulation of a hydraulic network with four nodes and two branches that form a two-level water distribution system. It also proposes a distribution of hydraulic valves that allows emulating a leak using a valve and different network configurations, e.g., simple ducts, closed networks and branched networks. The network is modeled in the steady state considering turbulent flow. Numerical experiments are performed, and the results show that the proposed network is useful for the design of leakage diagnosis and control algorithms in different configurations and leakage scenarios.

2015 ◽  
Vol 14 (1) ◽  
pp. 52-67 ◽  
Author(s):  
Raquel Vannucci Capelletti ◽  
Ângela Maria Moraes

Water is the main stimulus for the development of microorganisms, and its flow has an important role in the spreading of contaminants. In hospitals, the water distribution system requires special attention since it can be a source of pathogens, including those in the form of biofilms often correlated with resistance of microorganisms to various treatments. In this paper, information relevant to cases of nosocomial infections involving water circuits as a source of contaminants is compiled, with emphasis on the importance of microbiological control strategies to prevent the installation, spreading and growth of microorganisms in hospitals. An overview of the worldwide situation is provided, with emphasis on Brazilian hospitals. Different approaches normally used to control the occurrence of nosocomial infections due to waterborne contaminants are analyzed, and the use of the polysaccharide chitosan for this specific application is briefly discussed.


2020 ◽  
Vol 12 (1) ◽  
pp. 16-23
Author(s):  
Laxmy Devy ◽  
Yul Antonisfia ◽  
Monica Febrina ◽  
Suryadi Suryadi

Clean water management is managed by a Perusahaan Daerah Air Minum (PDAM), which is centered on each local government. The distribution of water to consumers cannot be done evenly because of the water distribution system and manual monitoring. Overcoming these problems, the Water Distribution Equity System to Consumers can be used to monitor and control water distribution. This system regulates the debit and time zone for water distribution to consumers. Water discharge is detected by the water flow sensor, and  the valve is connected to the servo and time zone using RTC DS1307. The water pump is controlled to maintain the volume of water in the reservoir. The water level in the reservoir is detected using the HC-SR04 ultrasonic sensor. Water distribution is monitored on PCs (Personal Computers) and smartphones using Delphi programming and Thingspeak. The reading of water discharge is generated during peak use times for each faucet is 1.9: 1.8: 1.8 while at the time of normal use the ratio of the initial distribution to each faucet is 2.5: 2.3, 1: 1, and 2.5: 2.3.  


Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1318 ◽  
Author(s):  
Beatriz Martínez-Bahena ◽  
Marco Cruz-Chávez ◽  
Erika Ávila-Melgar ◽  
Martín Cruz-Rosales ◽  
Rafael Rivera-Lopez

This research proposes a genetic algorithm that provides a solution to the problem of deficient distribution of drinking water via the current hydraulic network in the neighborhood “Fraccionamiento Real Montecasino” (FRM), in Huitzilac, Morelos, Mexico. The proposed solution is the addition of new elements to the FRM network. The new elements include storage tanks, pipes, and pressure-reducing valves. To evaluate the constraint satisfaction model of mass and energy conservation, the hydraulic EPANET solver (HES) is used with an optimization model to minimize the total cost of changes in the network (new pipes, tanks, and valves). A genetic algorithm was used to evaluate the optimization model. The analysis of the results obtained by the genetic algorithm for the FRM network shows that adequate and balanced pressures were obtained by means of small modifications to the existing network, which entailed minimal costs. Simulations were performed for an extended period, which means that the pressure was obtained by simulation with HSE at one-hour intervals, during the algorithm execution, to verify adequate pressure at a specific point in the system, or to make corrections to ensure proper distribution, this with the aim of having a final optimized network design.


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