Transient protection optimization of pipelines using air-chamber and air-inlet valves

Moghaddas, S. Mahmood Jazayeri; Samani, Hossein Mohammad Vali; Haghighi, Ali

doi:10.1007/s12205-016-0836-4

Cited by 21 publications

(13 citation statements)

References 9 publications

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“…Jazayeri Moghaddas et al(2016) for the implementation of the model by GA, considered the population size to be 80 chromosomes, the mutation rate 2%, and the binary tournament pairing and the blending crossover methods.…”

Section: Table3 the Cfo Parametersmentioning

confidence: 99%

Application of Central Force Optimization Method to Design Transient Protection Devices for Water Transmission Pipelines

Moghaddas¹,

Samani²

2016

MAS

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One of the major challenges in designing under pressure water transmission pipeline is the system protection against water-hammer pressures due to a pump trip. The best strategy is to use air-chamber; which imposes considerable costs. To mitigate the air-chamber volume, the use of air-inletvalvesis also suggested. Determination of air-chamber volume as well as the type and proper locations of air-inlet valves, aiming at the cost reduction, introduces an optimization problem. To solve this problem, this study exploitsthe central force optimization (CFO) method. Herein, a case study pipeline is optimized using the proposed model based on the CFO and is compared with results of a genetic algorithm (GA) based model. Both methods yielded almost the same results and led to about 30% saving in the system protection cost. However, a comparison between the methods showed that the CFO dramaticallyoutperforms GA in both terms of computational efficiency and reliability of the results.

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Section: Table3 the Cfo Parametersmentioning

confidence: 99%

Application of Central Force Optimization Method to Design Transient Protection Devices for Water Transmission Pipelines

Moghaddas¹,

Samani²

2016

MAS

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“…Except for different kinds of valves, there are many other protective devices such as air vessel and one-way surge tower. To optimize water hammer protective schemes, the types and locations of air-inlet valves and the size of the air vessels are determined and analyzed (Moghaddas et al 2017). The proposed model is capable to determine the proper number of air-inlet valves and the location to improve the effect of water hammer protection.…”

Section: Introductionmentioning

confidence: 99%

Study on water hammer protection of the siphon breaking structure in the water supply system

Lyu

Zhang

Wang

2022

Journal of Water Supply: Research and Technology-Aqua

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An appropriate water hammer protective scheme is a significant concern in the operation of water supply projects. According to the special terrain in the water supply project, which forms a siphon breaking structure at the end of the pipeline, three protective schemes were proposed and compared: single vacuum breaking valve (VBV) scheme, VBV and air valve scheme, and VBV and one-way surge tower scheme. Based on the control standards of pipe pressure, three protective schemes were assessed in terms of suppressing the negative pressure caused by a pump trip accident. The results show that the siphon breaking structure with the VBV can achieve good effect protection only in a limited range of pipelines. In the VBV and air valve scheme, the pressure oscillations were obviously caused by repeated inlet and exhaust of the air valves. To avoid supplementing too much gas in the pipe by air valves, which will result in a gas column bridging phenomenon, the VBV and one-way surge tower scheme is proposed and can better meet the requirement of the pressure control standard.

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“…The purpose of the above research on the basic parameters of air vessels is to obtain their optimal volume. Although an air vessel with a large volume can often achieve better water-hammer protection, a larger volume means more engineering investment (Moghaddas et al 2017). At present, the method of characteristics (MOC) is commonly used to simulate the transient process of pipeline systems (Wylie et al 1993).…”

Section: Introductionmentioning

confidence: 99%

“…To investigate the characteristics of the water-level oscillations in the air vessel, the theoretical derivation of the analytical formula for surge waves is the most effective and helpful method (Chen et al 2021). A water supply system with air vessels involves the nonlinearity of momentum equations, continuity equations and gas state equations; hence, it is very difficult to solve them directly and accurately (Moghaddas et al 2017;Bostan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Optimal volume selection of air vessels in long-distance water supply systems

Shi

Zhang

et al. 2021

Journal of Water Supply: Research and Technology-Aqua

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The use of air vessels is an effective measure to control water hammers, and its volume selection has a certain blindness. This paper aims to reveal the surge wave characteristics and provide design guidelines for air vessels in long-distance water supply systems. First, the analytical formulas of water-level oscillations in the air vessel are derived based on the Krylov–Bogoliubov–Mitropolsky method. Then, an optimization model is constructed for selecting the optimal volume of the air vessels. Finally, the validation of the analytical formulas and the optimization of the model are conducted through two actual projects. The results show that the calculation error of the analytical formulas can be controlled within a very small range, and the process of selecting air vessel volume can be simplified with the provided model. In addition, increasing the air chamber height within its range can reduce the volume of air vessels with the same protection requirements. The optimization analysis results of the air vessel can provide guidance and reference for the design of actual projects.

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Transient protection optimization of pipelines using air-chamber and air-inlet valves

Cited by 21 publications

References 9 publications

Application of Central Force Optimization Method to Design Transient Protection Devices for Water Transmission Pipelines

Application of Central Force Optimization Method to Design Transient Protection Devices for Water Transmission Pipelines

Study on water hammer protection of the siphon breaking structure in the water supply system

Optimal volume selection of air vessels in long-distance water supply systems

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