A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In a water distribution network 1 a rapid change in velocity of water produces a transient surge or pressure spike, which travels as a wave along the pipes 3 of the network. Such a change can be provoked by starting or stopping a pump 7. In a water distribution network 1 having at least one pump 7 for distributing water over the network, the pump 7 is driven by an electric motor 8 and a variable speed device 9, and means 10 for operating the pump in phases. On starting the pump in a first starting phase 20 the pump speed rises rapidly from zero to a threshold speed between zero and a maximum pump speed, in a second starting phase 22 the threshold speed is maintained, in a third starting phase 24 the pump speed is increased more slowly to a maximum speed, and in a fourth operating phase 26 the maximum speed is maintained. On stopping the pump 7, in a first stopping phase 28 the pump speed decreases gradually from a maximum speed to an intermediate speed, and in a second stopping phase 30 the pump speed decreases rapidly from the intermediate speed to zero.
In a water distribution network 1 a rapid change in velocity of water produces a transient surge or pressure spike, which travels as a wave along the pipes 3 of the network. Such a change can be provoked by starting or stopping a pump 7. In a water distribution network 1 having at least one pump 7 for distributing water over the network, the pump 7 is driven by an electric motor 8 and a variable speed device 9, and means 10 for operating the pump in phases. On starting the pump in a first starting phase 20 the pump speed rises rapidly from zero to a threshold speed between zero and a maximum pump speed, in a second starting phase 22 the threshold speed is maintained, in a third starting phase 24 the pump speed is increased more slowly to a maximum speed, and in a fourth operating phase 26 the maximum speed is maintained. On stopping the pump 7, in a first stopping phase 28 the pump speed decreases gradually from a maximum speed to an intermediate speed, and in a second stopping phase 30 the pump speed decreases rapidly from the intermediate speed to zero.
WATER DISTRIBUTION NETWORK
RESEAU DE DISTRIBUTION D'EAU
RAINE DAVID J (author)
2019-04-18
Patent
Electronic Resource
English
IPC:
F04D
Strömungsarbeitsmaschinen
,
NON-POSITIVE-DISPLACEMENT PUMPS
/
E03B
Anlagen oder Verfahren zum Gewinnen, Sammeln oder Verteilen von Wasser
,
INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
/
F17D
Rohrleitungssysteme
,
PIPE-LINE SYSTEMS
/
H02K
Dynamoelektrische Maschinen
,
DYNAMO-ELECTRIC MACHINES
Water Distribution Network Renewal Planning
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Leakage Model of Water Distribution Network
| ASCE | 2013