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Transcript
00:03
When working with a network model in WS pro
00:06
it is important to be aware of leakage. Flushing and cavitation
00:11
leakage refers to a specific type of unaccounted for water presumed lost
00:15
to distribution losses such as from leaks in pipework or fittings,
00:21
leakage can be estimated from flow data and
00:23
located using acoustics such as acoustic data loggers.
00:28
It is also possible to locate leakage from pressure monitoring.
00:31
Given a sufficiently accurate network model.
00:34
Understanding leakage is important to allocating demand in network models.
00:39
Estimating leakage requires estimating or knowing the net flow within an area.
00:44
The estimated legitimate night time usage per property and
00:47
any known or predicted exceptional demand such as factories.
00:52
Another important consideration of a network model is mains flushing.
00:56
A common practice that involves discharging flow through a hydrant.
01:00
Maine's flushing increases velocity and sheer stress
01:03
in a pipe to dislodge sediment.
01:06
This practice often requires networks to be partially isolated to
01:10
endure unidirectional flow in the pipe to maximize velocity.
01:14
Another concept to consider is cavitation,
01:17
the rapid formation and collapse of air pockets in liquid.
01:21
The collapse causes shockwaves that create a
01:23
distinctive sound and can damage equipment.
01:27
The cause of cavitation is a drop in pressure below vapor pressure when fluid
01:31
cannot move fast enough through a mechanism typically through a pump or valve.
01:36
Although it is not usually considered in network modeling.
01:39
Understanding,
01:40
cavitation is crucial during the investigation of control valves,
01:43
pumps and even pipes in some conditions.
00:03
When working with a network model in WS pro
00:06
it is important to be aware of leakage. Flushing and cavitation
00:11
leakage refers to a specific type of unaccounted for water presumed lost
00:15
to distribution losses such as from leaks in pipework or fittings,
00:21
leakage can be estimated from flow data and
00:23
located using acoustics such as acoustic data loggers.
00:28
It is also possible to locate leakage from pressure monitoring.
00:31
Given a sufficiently accurate network model.
00:34
Understanding leakage is important to allocating demand in network models.
00:39
Estimating leakage requires estimating or knowing the net flow within an area.
00:44
The estimated legitimate night time usage per property and
00:47
any known or predicted exceptional demand such as factories.
00:52
Another important consideration of a network model is mains flushing.
00:56
A common practice that involves discharging flow through a hydrant.
01:00
Maine's flushing increases velocity and sheer stress
01:03
in a pipe to dislodge sediment.
01:06
This practice often requires networks to be partially isolated to
01:10
endure unidirectional flow in the pipe to maximize velocity.
01:14
Another concept to consider is cavitation,
01:17
the rapid formation and collapse of air pockets in liquid.
01:21
The collapse causes shockwaves that create a
01:23
distinctive sound and can damage equipment.
01:27
The cause of cavitation is a drop in pressure below vapor pressure when fluid
01:31
cannot move fast enough through a mechanism typically through a pump or valve.
01:36
Although it is not usually considered in network modeling.
01:39
Understanding,
01:40
cavitation is crucial during the investigation of control valves,
01:43
pumps and even pipes in some conditions.
When working with a network model in InfoWorks WS Pro, it is important to be aware of leakage, flushing, and cavitation.