Hydraulics of Pipeline Systems

Larock, Bruce E.; Jeppson, Roland W.; Watters, Gary Z.

doi:10.1201/9781420050318

Cited by 158 publications

(128 citation statements)

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“…In DW models the relation between friction head loss and flow is defined by an implicit semiempirical equation, which involves non-smooth terms, and it can be numerically calculated through an iterative process. Similarly, HW formula is semi-empirical and non-smooth, since the second derivative of HW formula is unbounded around the origin (Larock et al, 1999, Sections 2.2.2 and 2.2.3) for details on these friction head loss formulae. For both DW and HW models, Eck and Mevissen (2015) propose the use of a quadratic approximation for head losses minimising the relative errors.…”

Section: Problem Formulationmentioning

confidence: 99%

Outer approximation methods for the solution of co-design optimisation problems in water distribution networks

2017

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In the present manuscript, we investigate and demonstrate the use of outer approximation methods for simultaneously optimising the placement and operation of control valves in water distribution networks. The problem definition results in a mixed-integer nonlinear program with nonconvex constraints. We simplify the formulation, compared to previous literature, in order to reduce the degree of nonlinearity in the constraints and decrease the total problem size. We then formulate the application of outer approximation based methods for the generation of good quality local optimal solutions for the considered co-design problem. Finally, we present the results of applying the developed techniques to two case studies, and also comparing the performances of the outer approximation approaches with those of other local mixed integer nonlinear programming solution methods.Keywords: Optimization and control of large-scale network systems, Water supply and distribution systems, Optimal operation of water resources systems.

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Section: Problem Formulationmentioning

confidence: 99%

Outer approximation methods for the solution of co-design optimisation problems in water distribution networks

2017

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“…Since the steady-state water head and flow rate for each node in the network has been estimated, the hydraulic transient can then be evaluated from the following momentum equation and continuity equation [25,38]:…”

Section: Hydraulic Transient Modelmentioning

confidence: 99%

“…The Hazen-Williams equation is used to express the relationship between the flow rate and head loss for each pipe [36,37]. The loss coefficient (K ij ) in the Hazen-Williams equation for a pipe is defined as [38]:…”

Section: Flow Simulation Modelmentioning

confidence: 99%

A Hybrid Heuristic Optimization Approach for Leak Detection in Pipe Networks Using Ordinal Optimization Approach and the Symbiotic Organism Search

Lin

2017

Water

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The OOA is applied to sift through the candidate pipes and the initial organisms with leak information. The SOS is employed to determine the leaks by minimizing the sum of differences between simulated and computed head at the observation points. Two synthetic leaking scenarios, a simple pipe network and a water distribution network (WDN), are chosen to test the performance of leak detection ordinal symbiotic organism search (LDOSOS). Leak information can be accurately identified by the proposed approach for both of the scenarios. The presented technique makes a remarkable contribution to the success of leak detection in the pipe networks.

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“…Segundo (Larock et al 1999), considerando o material da tubulação homogêneo e isotrópico, segundo teoria de mecânica dos sólidos, pode-se escrever…”

Section: Balanço De Massaunclassified

“…Segundo (Larock et al 1999), resultados experimentais tendem a aproximar a condição dinâmica da estática o que estabelece a relação…”

Section: Balanço De Massaunclassified

Desenvolvimento E Validação De Métodos De Detecção E Localização De Vazamentos Em Oleodutos

ARAMAKI¹

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Aramaki, Thiago Lessa; Barbosa, Carlos Roberto Hall (Advisor). For the leak location systems the systems tested were: sonic velocity, hydraulic gradient and artificial neural networks. The products used were gasoline, diesel and fuel oil. On the issue of leak detection, the system based on neural networks detected simulated leakages, although there were some false indications. The system based on fuzzy logic presented good results, giving correct leak indications without any indication of false alarms, interpreting correctly the phenomena due to pipeline usual operations. The mass balance system has also presented good results, not generating false alarms, but detecting simulated leaks even with the pipeline in shut-in condition. To evaluate leak detection systems is common to conduct field tests that can be costly and take a long time to accomplish. A method for testing at a lower cost should be developed and a proposal is being shown in this work. Development and Validation of Methods for Detection and

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Hydraulics of Pipeline Systems

Cited by 158 publications

References 0 publications

Outer approximation methods for the solution of co-design optimisation problems in water distribution networks

Outer approximation methods for the solution of co-design optimisation problems in water distribution networks

A Hybrid Heuristic Optimization Approach for Leak Detection in Pipe Networks Using Ordinal Optimization Approach and the Symbiotic Organism Search

Desenvolvimento E Validação De Métodos De Detecção E Localização De Vazamentos Em Oleodutos

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