Hydraulic Design Algorithms For Upgrading And Enhancing Water Distribution Systems
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Hydraulic Design Algorithms For Upgrading And Enhancing Water Distribution Systems
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Author : Don J. Wood
language : en
Publisher:
Release Date : 1986
Hydraulic Design Algorithms For Upgrading And Enhancing Water Distribution Systems written by Don J. Wood and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Water categories.
Selected Water Resources Abstracts
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Author :
language : en
Publisher:
Release Date : 1990
Selected Water Resources Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Hydrology categories.
Selected Water Resources Abstracts
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Author :
language : en
Publisher:
Release Date : 1990
Selected Water Resources Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Water categories.
A Penalty Free Multi Objective Evolutionary Optimization Approach For The Design And Rehabilitation Of Water Distribution Systems
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Author : Calvin Yew Ming Siew
language : en
Publisher:
Release Date : 2011
A Penalty Free Multi Objective Evolutionary Optimization Approach For The Design And Rehabilitation Of Water Distribution Systems written by Calvin Yew Ming Siew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
As a result of the increasing emphasis placed on water companies to conform to the stringent performance standards in supplying demands within a constrained financial budget, the application of optimization has inevitably become an integral part of managing a water distribution system (WDS) right from the initial phase of designing a new system to the latter stage of the network where rehabilitation and upgrading works are a necessity. This also includes the on-going operation of the WDS in particular the minimization of energy costs related to pumping and storage. This thesis is concerned with the development and application of a new multi-objective genetic algorithm in optimizing the design, operation and long term rehabilitation and upgrading of the WDS.The novelty and originality of the work done as part of this research are presented next.A seamless, augmented version of the renowned EPANET 2 with pressure dependent analysis (PDA) functionality has been developed. It integrates within the hydraulic engine a continuous nodal pressure-flow function coupled with a line search and backtracking procedure which greatly enhances the algorithm's overall convergence rate and robustness. The hydraulic simulator is termed "EPANET-PDX" (pressure-dependent extension) herein and is capable of effectively modelling networks under pressure deficient situations which the demand driven analysis based EPANET 2 fails to accurately analyse. In terms of computational efficiency, the performance of EPANET-PDX compares very favourably to EPANET 2. Simulations of real life networks consisting of multiple sources, pipes, valves and pumps were successfully executed with no convergence complications. The simulator depicts excellent modelling performance while analysing both normal and abnormal operating conditions of the WDSs. The accuracy of the generated PDA results has been explicitly validated and verified.An optimization model for the optimal design and upgrading of WDS involving both the operation of multiple pumps and the sizing and location of multiple tanks is developed. The model couples a new boundary convergent multi-objective genetic algorithm to the highly efficient EPANET-PDX simulator which, inherently,automatically accounts for the node pressure constraints as well as the conservation of mass and energy. With accurate PDA, the direct application of the standard extended period simulation enables pump scheduling and tank sizing and siting to be seamlessly incorporated into the optimization without the need for any extraneous methodology or manual intervention. The significant advantage of this model is that it eliminates the need for ad-hoc penalty functions, additional "boundary search" parameters, or special constraint handling procedures. No operator intervention, parameter calibration and trial runs are required. Conceptually, the approach is straightforward and probably the simplest hitherto. The model is applied to several benchmark networks yielding superior results in terms of the initial network construction cost and the number of hydraulic simulations required.The above-mentioned optimization model is extended to form a module for the optimal long term design, upgrading and rehabilitation of WDSs. The multi-criteria problem is set up in a multi-objective frame work i.e. to minimize the capital cost,rehabilitation and upgrading costs, whilst maximizing the network hydraulic performance. A straightforward approach for incorporating reliability measures without further complicating the optimization formulation is utilised and its robustness validated. The effect of deterioration of both the structural integrity and hydraulic capacity of pipes over time is explicitly modelled. The model automatically determines the most cost effective strategy which includes the identification of pipes to be upgraded, the upgrading or rehabilitation options and the timing for the upgrade to be implemented. A real life network in Wobulenzi (Uganda) is used to demonstrate the effectiveness of the model. Results obtained demonstrated major improvements over previous work using the classical linear programming.
Optimal Design And Efficiency Improvement Of Fluid Machinery And Systems
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Author : Ramesh K. Agarwal
language : en
Publisher: Frontiers Media SA
Release Date : 2023-07-19
Optimal Design And Efficiency Improvement Of Fluid Machinery And Systems written by Ramesh K. Agarwal and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-07-19 with Technology & Engineering categories.
Deterioration And Optimal Rehabilitation Modelling For Urban Water Distribution Systems
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Author : Yi Zhou
language : en
Publisher: CRC Press
Release Date : 2018-05-03
Deterioration And Optimal Rehabilitation Modelling For Urban Water Distribution Systems written by Yi Zhou and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-03 with Science categories.
Pipe failures in water distribution systems can have a serious impact and hence it’s important to maintain the condition and integrity of the distribution system. This book presents a whole-life cost optimisation model for the rehabilitation of water distribution systems. It combines a pipe breakage number prediction model with a pipe criticality assessment model, which enables the creation of a well-constructed and more tightly constrained optimisation model. The pipe breakage number prediction model combines information on the physical characteristics of the pipes with historical information on breakage and failure rates. A weighted multiple nonlinear regression analysis is applied to describe the condition of different pipe groups. The criticality assessment model combines a pipe’s condition with its hydraulic significance through a modified TOPSIS. This model enables the optimisation to focus its efforts on those important pipes. The whole life cost optimal rehabilitation model is a multiple-objective and multiple-stage model, which provides a suite of rehabilitation decisions that minimise the whole life cost while maximising its long-term performance. The optimisation model is solved using a modified NSGA-II. The utility of the developed models is that it allows decision makers to prioritize their rehabilitation strategy in a proactive and cost-effective manner.
Metaheuristic Applications In Structures And Infrastructures
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Author : Kasthurirangan Gopalakrishnan
language : en
Publisher: Elsevier Inc. Chapters
Release Date : 2013-01-31
Metaheuristic Applications In Structures And Infrastructures written by Kasthurirangan Gopalakrishnan and has been published by Elsevier Inc. Chapters this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-31 with Technology & Engineering categories.
Metaheuristic Applications In Structures And Infrastructures
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Author : Xin-She Yang
language : en
Publisher: Newnes
Release Date : 2013-01-31
Metaheuristic Applications In Structures And Infrastructures written by Xin-She Yang and has been published by Newnes this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-31 with Technology & Engineering categories.
Due to an ever-decreasing supply in raw materials and stringent constraints on conventional energy sources, demand for lightweight, efficient and low-cost structures has become crucially important in modern engineering design. This requires engineers to search for optimal and robust design options to address design problems that are commonly large in scale and highly nonlinear, making finding solutions challenging. In the past two decades, metaheuristic algorithms have shown promising power, efficiency and versatility in solving these difficult optimization problems. This book examines the latest developments of metaheuristics and their applications in structural engineering, construction engineering and earthquake engineering, offering practical case studies as examples to demonstrate real-world applications. Topics cover a range of areas within engineering, including big bang-big crunch approach, genetic algorithms, genetic programming, harmony search, swarm intelligence and some other metaheuristic methods. Case studies include structural identification, vibration analysis and control, topology optimization, transport infrastructure design, design of reinforced concrete, performance-based design of structures and smart pavement management. With its wide range of everyday problems and solutions, Metaheursitic Applications in Structures and Infrastructures can serve as a supplementary text for design courses and computation in engineering as well as a reference for researchers and engineers in metaheuristics, optimization in civil engineering and computational intelligence. Review of the latest development of metaheuristics in engineering. Detailed algorithm descriptions with focus on practical implementation. Uses practical case studies as examples and applications.
Sustainable Water Resources Management Xi
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Author : S. Mambretti
language : en
Publisher: WIT Press
Release Date : 2021-08-04
Sustainable Water Resources Management Xi written by S. Mambretti and has been published by WIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-04 with Technology & Engineering categories.
Papers presented at the 11th International Conference on Sustainable Water Resources Management are included in this volume. These research works highlight recent technological and scientific developments associated with the management of surface and sub-surface water resources and as well as river basin management methodologies. Water is essential for sustaining life on our planet and its uneven distribution is a source of permanent conflict. The growth of the human population combined with the irregularity in precipitation and water availability may restrict even further the access to water in certain regions of the world. This problem is made more severe by anthropogenic activities that affect its quality. River Basin Management includes all aspects of Hydrology, Ecology, Environmental Management, Flood Plains and Wetlands. Riverine systems are coming under increasing pressure due to anthropological and natural causes. Prominent amongst the problems affecting them is water scarcity and quality, which requires the development of improved methods for better river management. This volume features research from professionals involved in sustainable water resources management and provides an insight into the state of the art in the current technology, techniques and solutions in that field as they have been developed and applied in different countries.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1995
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Power resources categories.