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:: Volume 5, Issue 3 (Summer, 2018) ::
Environ. health eng. manag. 2018, 5(3): 143-151 Back to browse issues page
Increasing convergence rate in two-objective optimization of water distribution network with engineering judgment
Fariba Sherri , Amir Hossein Mahvi , Abbas Toloie Eshlaghy , Amir Hessam Hassani
Corresponding Author: Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , ahmahvi@yahoo.com
Abstract:   (295 Views)
Background: Water distribution networks (WDNs) are facilities that require massive investment and their optimization is very important. This study aimed to optimization and development of models for promoting WDNs with using engineering judgment. In this method, instead of controlling all system states,
it is possible to search the optimal set of options based on engineering judgment and hydraulic and physical status of the system. Thus, the time to solve the optimization problem is greatly reduced, which is very important in widespread networks with many components. The case study was a WDN in western Tehran.
Methods: To reduce the calculation size and increase the convergence rate using engineering judgment, the parts of the network where there was no possibility of parallel piping was ignored. For other parts with a low pressure problem, parallel piping was defined. A FMGA and WaterGEMS hydraulic software were used to optimize the WDN. Cost minimization and pressure benefit maximization were the objective functions and the diameters of the pipes were considered to be the decision variables.
Results: The results of optimization the network showed that, the cost decreased 89.84% and the pressure in all nodes, except one node, reached within the standard range (26-60 mH20). It included 2387 m of pipe with diameters of 100, 150, 200, 250, 350, 400 and 500 mm.
Conclusion: The results of optimization and modification of the network using engineering judgment confirm that the cost decreased significantly and the pressure level in all the nodes increased to above the allowable minimum pressure.
Keywords: Water, Judgment, Software, Pressure, Engineering
eprint link: http://eprints.kmu.ac.ir/id/eprint/29071
Full-Text [PDF 870 kb]   (157 Downloads)    
Type of Study: Research | Subject: Special
Received: 2018/10/7 | Accepted: 2018/10/7 | Published: 2018/10/7
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Sherri F, Mahvi A H, Toloie Eshlaghy A, Hassani A H. Increasing convergence rate in two-objective optimization of water distribution network with engineering judgment. Environ. health eng. manag.. 2018; 5 (3) :143-151
URL: http://ehemj.com/article-1-364-en.html


Volume 5, Issue 3 (Summer, 2018) Back to browse issues page
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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