A TWO-PHASE NETWORK DESIGN HEURISTIC FOR MINIMUM COST WATER DISTRIBUTION SYSTEMS UNDER A RELIABILITY CONSTRAINT

1990 ◽  
Vol 15 (4) ◽  
pp. 311-336 ◽  
Author(s):  
G. V. LOGANATHAN ◽  
HANIF D. SHERALI ◽  
MAHESH P. SHAH
Keyword(s):  
Network Design ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Minimum Cost ◽  
Two Phase ◽  
Reliability Constraint ◽  
Design Heuristic

scholarly journals Numerical Modelling and Simulation of Two-Phase Flow Flushing Method for Pipeline Cleaning in Water Distribution Systems

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2470
Author(s):  
Zhaozhao Tang ◽  
Wenyan Wu ◽  
Xiaoxi Han ◽  
Ming Zhao ◽  
Jingting Luo ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Distribution Systems ◽  
Water Distribution ◽  
Two Phase Flow ◽  
Growth Ring ◽  
Water Distribution Systems ◽  
Water Phase ◽  
Phase Flow ◽  
Two Phase ◽  
Secondary Pollution

Secondary pollution by microorganisms and substances peeling off from the “growth ring” causes clean water deterioration during the water distribution process. In order to reduce the secondary pollution, our previous research investigated the best settings of a two-phase flow flushing method for pipeline cleaning in water distribution systems experimentally, and a case study was carried out for comparison of the efficiencies between two-phase and single-phase flow methods. In this paper, based on the results of the experimental study, numerical modelling and a simulation study are carried out by FLUENT to evaluate the performance of the two-phase flow flushing method for removal of the “growth ring”. Results: the simulation results match the experimental results; pressure, water-phase flow velocity and water-phase volume ratio distributions in a section of pipe are simulated and analysed; the shear force against time in a period is obtained; elbow pipes cause flushing energy loss, and therefore, at most one section of elbow pipe is flushed in one flushing period.

scholarly journals SmartCrawler: An In-pipe Robotic System with Novel Low-frequency Wireless Communication Setup in Water Distribution Systems

2021 ◽  
Author(s):  
Saber Kazeminasab ◽  
M.Katherine Banks
Keyword(s):  
Wireless Communication ◽  
Radio Frequency Identification ◽  
Distribution Systems ◽  
Water Distribution ◽  
Phase 1 ◽  
Water Distribution Systems ◽  
Robotic System ◽  
Experimental Results ◽  
Circuit Board ◽  
Two Phase

Water Distribution Systems (WDS) are critical infrastructures that deliver potable water to residential areas. Water quality monitoring is one of the requirements for utility managers to ensure the health of the water. However, it is challenging to access all parts of the WDS since they are long and comprise different configurations. In this paper, we propose a size-adaptable in-pipe robot so-called “SmartCrawler”. We develop two-phase control algorithm that enables reliable motion in different configurations of pipelines. The controller in phase 1 stabilizes the robot in the straight paths and tracks the desired velocity with high-level linear quadratic regulator (LQR) and low-level proportional-integral-derivative (PID) based controllers. The controller in phase 2 enables the robot to have reliable change of direction in the non-straight paths. The performance of the two-phase controller is evaluated with experimental and simulation results. Wireless underground communication is a challenging task for underground applications. To facilitate wireless communication, we propose an active radio frequency identification (RFID) based communication working in 434MHz carrier frequency and evaluate its performance with experimental results. At the end of this work, we design the printed circuit board (PCB) for the SmartCrawler. The simulation and the experimental results prove the proposed robotic system can be used for in-pipe missions where wireless communication is needed to communicate with the robot during operation. <br>

scholarly journals An Experimental Study of Two-Phase Pulse Flushing Technology in Water Distribution Systems

Water ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 927 ◽  
Author(s):  
Zhaozhao Tang ◽  
Wenyan Wu ◽  
Xiaoxi Han ◽  
Ming Zhao
Keyword(s):  
Experimental Study ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Two Phase

scholarly journals SmartCrawler: An In-pipe Robotic System with Novel Low-frequency Wireless Communication Setup in Water Distribution Systems

2021 ◽  
Author(s):  
Saber Kazeminasab ◽  
M.Katherine Banks
Keyword(s):  
Wireless Communication ◽  
Radio Frequency Identification ◽  
Distribution Systems ◽  
Water Distribution ◽  
Phase 1 ◽  
Water Distribution Systems ◽  
Robotic System ◽  
Experimental Results ◽  
Circuit Board ◽  
Two Phase

Water Distribution Systems (WDS) are critical infrastructures that deliver potable water to residential areas. Water quality monitoring is one of the requirements for utility managers to ensure the health of the water. However, it is challenging to access all parts of the WDS since they are long and comprise different configurations. In this paper, we propose a size-adaptable in-pipe robot so-called “SmartCrawler”. We develop two-phase control algorithm that enables reliable motion in different configurations of pipelines. The controller in phase 1 stabilizes the robot in the straight paths and tracks the desired velocity with high-level linear quadratic regulator (LQR) and low-level proportional-integral-derivative (PID) based controllers. The controller in phase 2 enables the robot to have reliable change of direction in the non-straight paths. The performance of the two-phase controller is evaluated with experimental and simulation results. Wireless underground communication is a challenging task for underground applications. To facilitate wireless communication, we propose an active radio frequency identification (RFID) based communication working in 434MHz carrier frequency and evaluate its performance with experimental results. At the end of this work, we design the printed circuit board (PCB) for the SmartCrawler. The simulation and the experimental results prove the proposed robotic system can be used for in-pipe missions where wireless communication is needed to communicate with the robot during operation. <br>

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