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Optimization Analysis of Water Supply Distribution System The Case Study of Awash Sebat Killo Town Distribution System

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dc.contributor.advisor Mebrate, Tadesse (PhD)
dc.contributor.author Gezahegn, Hailemariam
dc.date.accessioned 2019-01-17T08:46:50Z
dc.date.available 2019-01-17T08:46:50Z
dc.date.issued 2018-10
dc.identifier.uri http://localhost:80/xmlui/handle/123456789/15850
dc.description.abstract Water supply distribution systems estimated to account of 80 to 85% of the total cost for the whole Water supply project (International Journal of Mechanical Engineering and Technology, 2014), that include source development, pump and motor house (including Pump and Generator) construction of treatment plant and reservoirs. Unless the cost for distribution system made to be decreased or optimized, the increase to the total project cost of the water supply system is inevitable. Thus, the problem is how to implement the water supply distribution network with optimum cost. Currently, pipe sizes in distribution networks are assigned by trial and error method. Then pressure and velocity values are checked whether they are within permissible values or not. This study is prepared to show how the formulated methodology using Matlab bring about optimized pipe size and hence reduction in the pipe network cost. The distribution system taken as a case study for analysis is Awash Sebat killo town water supply distribution system. Eight loops are selected from the total distribution network based on the size of pipes found in the loops. The pipes in the selected loops have larger pipe sizes than other loops. Therefore, it is found reasonable to optimize these loops to get considerable cost reduction. The optimization process was carried out taking the pressure values, pipe lengths, Nodal demands from the output of Epanet. The main constraint, pressure output, is made to pass through calibration test before it is being used for optimization by Matlab.Objective and constraint functions are written in Matlab-file. The Objective function is the sum of the product of cost of each type of pipe per unit meter length. The Constraints are: the sums of the head loss around a loop need to be equal to zero, and the pressures at nodes in the loop must be greater than 15m, and flow velocity in the pipes need to be greater than 0.6m/sec. After optimization process was completed changes for pipe sizes in the selected loops are noted. And these new optimized pipe diameters are entered in the design software (Epanet) to check whether the design criteria were preserved or not. The result shows that the pressure values at the nodes of the considered loops are greater than 15m. The analysis shows that the new optimized pipe diameters satisfy the required demand at the nodes before optimization is carried out. The total cost of the pipes before optimization is compared with that after optimization. As a result, the total cost reduction is found to be 15.87% of the total cost for the pipes and fittings in the whole network. Finally, recommendation is suggested to use the methodology developed to attain economical pipe sizes by reviewing any designed water supply distribution system. en_US
dc.language.iso en_US en_US
dc.publisher Addis Ababa University en_US
dc.subject Water Supply en_US
dc.subject Awash Sebat Killo en_US
dc.subject Distribution System en_US
dc.subject Optimization en_US
dc.title Optimization Analysis of Water Supply Distribution System The Case Study of Awash Sebat Killo Town Distribution System en_US
dc.type Thesis en_US

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