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
WASSERVERTEILUNGSNETZ
RÉSEAU DE DISTRIBUTION D'EAU
RAINE DAVID J (author)
2019-04-24
Patent
Electronic Resource
English
IPC:
E03B
Anlagen oder Verfahren zum Gewinnen, Sammeln oder Verteilen von Wasser
,
INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
/
F04B
Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten
,
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
/
F04D
Strömungsarbeitsmaschinen
,
NON-POSITIVE-DISPLACEMENT PUMPS
Water Distribution Network Renewal Planning
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Leakage Model of Water Distribution Network
| ASCE | 2013