MULTIOBJECTIVE DESIGN OF WATER DISTRIBUTION NETWORK INCORPORATING RELIABILITY CONSIDERATIONS AND LEAST COST ANALYSIS

Abstract

In spite of broad research, the design of water distribution networks are not realized using optimization techniques primarily, because design of water distribution networks is considered generally, as a least-cost optimization problem where pipe diameters being considered as the only decision variables.One of the major factors that motivates to analyze the water distribution network problem, is the complexity of algorithms generated using linear programming, and their non friendly nature. Hence, with the passage of time, several computer codes/software’s have been developed to make these problems user friendly and simple. In fact, domestic water distribution network systems are quite complex systems such that it is not easy to obtain most reliable and economically efficient systems considering ,constraints such as reliability, in addition to classical constraints related to hydraulic feasibility, satisfaction of nodal demands and requirement of nodal pressures. This study represents a user-friendly package concerning the design of water distribution networks by optimization using reliability considerations; this works employs the algorithm proposed by Jacobs and Goulter 1989.At the end, a systemized network design is offered.The schematic network is constructed using commercial software Bentley WATERGEMS V8i which is also used to simulate the results. This study provides an approach for assessing the performance and reliability of a selected network for urban residential area.Chapter 1 of this study gives the basic introduction of water distribution systems,methods used to analyse the networks,objective and brief introduction of methalodolgy of the network simulation. In Chapter 2, a brief review of the optimization techniques of water distribution networks and water distribution system is discussed in short. In Chapter 3, methodology involved in the study that is linear programming, which is used in case studies was presented. In Chapter 4, Network study using WaterGEMS software is discussed, working mechanism of the software is described in detail. Further Case study is presented in Chapter 5.Results and modifications of data are presented in Chapter 6.