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Professional CAD/CAM tools built on Inventor and AutoCAD
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:04
Using InfoSurge to model a water distribution system is an effective way to predict and prevent pressure surges,
00:12
or water hammer, from causing problems in the system.
00:16
Another term for pressure surges, hydraulic transients,
00:20
describes the disturbances in a fluid caused during a change from one steady-state to another.
00:27
The main components of the disturbances are pressure changes
00:31
caused by the propagation of pressure waves throughout the distribution system.
00:36
These pressure waves continue to propagate with the velocity of sound
00:40
until they dissipate to the level of the new steady-state through some form of damping or friction.
00:48
Disturbances in water distribution systems, or transients,
00:52
can happen in several situations, such as:
00:56
Pump startup or shutdown
00:58
Valve opening or closing (variation in flow area)
01:03
Changes in boundary pressures—for example, a reservoir level
01:08
or pressure tank
01:11
Rapid changes in demand conditions, such as hydrant flushing
01:15
Changes in transmission conditions, like a pipe break
01:19
Hydraulic systems must be designed to accommodate both normal
01:24
and abnormal operations and safeguarded to handle adverse external events
01:30
such as power failures and pipeline fractures.
01:34
The main design considerations generally used to mitigate transient conditions include:
01:40
Alteration of pipeline characteristics, such as pipe diameter
01:45
Improvement in valve and pump control procedures
01:49
Design and installation of surge protection devices
01:53
It is possible for a smooth transition from one steady-state to another
01:59
without large fluctuations in pressure head or pipe velocity, if the flow is regulated extremely slowly.
02:07
You can use InfoSurge to model many of the devices that control pressure and flow transients,
02:13
including: Open surge tanks
02:16
Closed surge vessels
02:18
Bladder tanks
02:21
Hybrid tanks, vented to admit air
02:24
Bypass lines
02:26
Check valves
02:28
Feed tanks, which provide inflow to prevent cavitation
02:32
Air release/vacuum valves, such as two and three stage valves
02:38
Pressure relief valves
02:41
Surge anticipation valves
02:44
Recognizing and addressing potential issues through transient flow simulation and analysis
02:50
is essential to avoiding serious problems for water utilities.
Video transcript
00:04
Using InfoSurge to model a water distribution system is an effective way to predict and prevent pressure surges,
00:12
or water hammer, from causing problems in the system.
00:16
Another term for pressure surges, hydraulic transients,
00:20
describes the disturbances in a fluid caused during a change from one steady-state to another.
00:27
The main components of the disturbances are pressure changes
00:31
caused by the propagation of pressure waves throughout the distribution system.
00:36
These pressure waves continue to propagate with the velocity of sound
00:40
until they dissipate to the level of the new steady-state through some form of damping or friction.
00:48
Disturbances in water distribution systems, or transients,
00:52
can happen in several situations, such as:
00:56
Pump startup or shutdown
00:58
Valve opening or closing (variation in flow area)
01:03
Changes in boundary pressures—for example, a reservoir level
01:08
or pressure tank
01:11
Rapid changes in demand conditions, such as hydrant flushing
01:15
Changes in transmission conditions, like a pipe break
01:19
Hydraulic systems must be designed to accommodate both normal
01:24
and abnormal operations and safeguarded to handle adverse external events
01:30
such as power failures and pipeline fractures.
01:34
The main design considerations generally used to mitigate transient conditions include:
01:40
Alteration of pipeline characteristics, such as pipe diameter
01:45
Improvement in valve and pump control procedures
01:49
Design and installation of surge protection devices
01:53
It is possible for a smooth transition from one steady-state to another
01:59
without large fluctuations in pressure head or pipe velocity, if the flow is regulated extremely slowly.
02:07
You can use InfoSurge to model many of the devices that control pressure and flow transients,
02:13
including: Open surge tanks
02:16
Closed surge vessels
02:18
Bladder tanks
02:21
Hybrid tanks, vented to admit air
02:24
Bypass lines
02:26
Check valves
02:28
Feed tanks, which provide inflow to prevent cavitation
02:32
Air release/vacuum valves, such as two and three stage valves
02:38
Pressure relief valves
02:41
Surge anticipation valves
02:44
Recognizing and addressing potential issues through transient flow simulation and analysis
02:50
is essential to avoiding serious problems for water utilities.
Using InfoSurge to model a water distribution system is an effective way to predict and prevent pressure surges, or water hammer, from causing problems in the system.
Hydraulic transients—another term for pressure surges.
Describes disturbances in fluid caused during change from one steady-state to another.
Main components of disturbances are pressure changes caused by propagation of pressure waves throughout distribution system.
Pressure waves continue to propagate with velocity of sound until they dissipate to level of new steady-state through some form of damping or friction.
Transients can happen in several situations, such as:
Hydraulic systems must be designed to accommodate both normal and abnormal operations and safeguarded to handle adverse external events such as power failures and pipeline fractures.
Main design considerations generally used to mitigate transient conditions include:
If flow is regulated extremely slowly, then it is possible to achieve smooth transition from one steady-state to another without large fluctuations in pressure head or pipe velocity.
Can use InfoSurge to model devices that control pressure and flow transients, including:
Recognizing and addressing potential issues through transient flow simulation and analysis is essential to avoiding serious problems for water utilities.
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