& Construction

Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing

Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:04
In info
00:04
works.
00:04
WS pro the drain down and recharge simulation
00:08
options in the run schedule can improve the
00:10
model accuracy for a situation in which a
00:12
network loses pressure and pressure is later recharged.
00:17
This simulation can highlight the locations of the first and last customers
00:22
to lose pressure and how long it could take to regain it
00:26
in this exercise. Part of a small network is isolated for a water quality issue
00:32
in the model group window under the drain down model group click and
00:36
drag the drain town network into the workspace to open the GEO plan.
00:41
This small network is supplied by a simple fixed
00:44
head node representing a pumping station to the east
00:47
to simulate drain down.
00:49
You will close an isolation valve just downstream of
00:51
the pumping station to see the effect on the network
00:55
first. Create a new scenario by clicking the create scenario button in the toolbar.
01:01
In the new scenario, name field type in the name isolation,
01:06
click. OK.
01:07
Then zoom into the area of the
01:09
network immediately downstream of the pumping station.
01:13
Double click the valve in the upper part of the T
01:15
junction with the asset ID 205301 to open its properties.
01:22
Scroll down in the valve object properties window and under valve control,
01:26
find the mode id field.
01:29
It is currently set as a TV,
01:31
a throttled valve which does not change during a simulation.
01:35
You need to change it to a time controlled valve T CV.
01:39
So you can open and close it during the simulation to model a temporary shutdown,
01:44
expand the dropdown and select T CV.
01:48
You now have the option to edit the profiles field.
01:52
Click the more button with the ellipsis to open a dialogue where
01:55
you can edit the date and time of the valve opening and closing
01:59
in the table.
02:00
In the date and time column,
02:02
either expand the drop down to set the
02:04
following dates and times or type them in manually
02:08
in the first row. March 1st 2023 at midnight
02:13
in the second row, March 1st 2023 at six AM
02:18
and in the third row, March 1st 2023 at seven PM
02:24
in the opening percentage column type in the following values
02:28
in the first row, 100
02:31
in the second row zero
02:33
and in the third row 100
02:36
this means the valve is set to be fully open at midnight,
02:40
close at six AM, then open again at seven PM.
02:44
Click, OK.
02:47
In the toolbar, click save data to commit the changes you just made to the database.
02:52
Click OK? In both notifications that follow
02:56
then, right click the drain down model group and create a new run group and run
03:04
in the schedule. Hydraulic run dialogue in the title field.
03:07
Enter the name isolation base.
03:10
Enable the experimental option
03:13
with the required items.
03:14
Tab open click and drag the drain town network to the network pa in the dialogue.
03:20
In this example,
03:21
the control and demand diagram pans populate automatically because
03:25
they were previously associated with the drain town network.
03:29
Next, open the scenarios, tab
03:32
disable the base option and then enable isolation,
03:36
click save and then run
03:40
info works. WS pro does not simulate draind down by default.
03:43
So the results of this run will serve as a before snapshot for comparison later,
03:50
once the run is finished, click and drag the results to open them in the GEO plan
03:55
in the tools, toolbar,
03:56
click the graph tool and then click any hydrant downstream of the valve.
04:01
In this example, a hydrant with the asset ID 397 884 is selected.
04:08
The graph indicates a total loss in pressure at six AM when
04:12
the valve closes and pressure then returns to normal at seven PM.
04:16
After the valve opens again,
04:19
you can also select any link to view similar effects on flow.
04:24
At this time,
04:25
you have the option to run a query to find
04:27
out how many customers were isolated during this operation.
04:31
Expand the stored query group, then click and drag.
04:34
Select isolated customers to the GEO plan to run it.
04:39
This automatically selects all customers in the network
04:41
who were isolated for longer than one hour.
04:45
In this case,
04:45
every customer highlighted in red downstream of the valve is affected.
04:50
Now run the isolated customer count query.
04:53
A small grid appears in the workspace indicating
04:56
that 230 customers were isolated during the operation
05:01
in the replay toolbar. Click clear results.
05:05
Now you'll run another simulation this time with draind down enabled
05:10
double click the isolation base run to open the schedule,
05:13
hydraulic run dialogue again,
05:15
change the name to isolation, draind down and then click save.
05:21
Note that the new run displays in the model group window
05:25
in the run parameters group box,
05:27
expand the dropdown and select simulation options.
05:31
Then click the options button
05:33
in the simulation options window enable allow drain down and allow recharge,
05:40
close the window. Then click save and run in the dialogue.
05:45
Open the results by clicking and dragging them to the GEO plan
05:50
with the graph tool enabled. Click the same hydrant as you did. After the base run,
05:56
the graph shows that instead of the pressure dropping to zero,
05:59
it stops at a lower value and then gradually decreases until around six PM.
06:04
Repeat this action by graphing any link downstream
06:07
from the valve to see that flow is also
06:09
impacted during the isolation period but is not immediately
06:12
interrupted as it was in the base run.
06:15
Once again,
06:16
run the select isolated customers and isolated customer count queries.
06:21
The select isolated customers query shows far fewer customers are isolated
06:26
for longer than one hour than in the base run.
06:28
Customers not highlighted retain water pressure,
06:31
albeit lower pressure rather than losing it completely.
06:35
The isolated customer count query shows far fewer customers. Only 60.
06:39
In this case are isolated.
06:42
You can also visualize the run results using a long section
06:46
in the tools,
06:47
toolbar enable the trace and select links upstream tool and then find
06:52
the southwestern most point in the network and click to highlight it.
06:56
This runs a trace back to the water source.
06:60
Now from the windows toolbar,
07:02
click the new long section tool to view the
07:04
traced portion of the network as a long section,
07:07
right,
07:08
click the long section window and select
07:10
properties to open the section properties dialogue
07:13
for better visual clarity.
07:15
When viewing the long section disable the option to show min
07:18
max HGL lines.
07:21
Click OK.
07:23
In the long section window,
07:25
the horizontal blue line indicates the pressure level in
07:28
relation to the position within the long section.
07:32
In the replay toolbar,
07:33
click play to step through the simulation
07:35
timeline and observe how the pressure changes at
07:38
six AM when the valve is closed and then gradually decreases until seven PM.
07:44
Portions of the network immediately downstream of
07:46
the isolation lose pressure during this time.
07:49
But areas further downstream, maintain pressure
07:53
at seven PM. The isolation valve reopens and the network is recharged.
00:04
In info
00:04
works.
00:04
WS pro the drain down and recharge simulation
00:08
options in the run schedule can improve the
00:10
model accuracy for a situation in which a
00:12
network loses pressure and pressure is later recharged.
00:17
This simulation can highlight the locations of the first and last customers
00:22
to lose pressure and how long it could take to regain it
00:26
in this exercise. Part of a small network is isolated for a water quality issue
00:32
in the model group window under the drain down model group click and
00:36
drag the drain town network into the workspace to open the GEO plan.
00:41
This small network is supplied by a simple fixed
00:44
head node representing a pumping station to the east
00:47
to simulate drain down.
00:49
You will close an isolation valve just downstream of
00:51
the pumping station to see the effect on the network
00:55
first. Create a new scenario by clicking the create scenario button in the toolbar.
01:01
In the new scenario, name field type in the name isolation,
01:06
click. OK.
01:07
Then zoom into the area of the
01:09
network immediately downstream of the pumping station.
01:13
Double click the valve in the upper part of the T
01:15
junction with the asset ID 205301 to open its properties.
01:22
Scroll down in the valve object properties window and under valve control,
01:26
find the mode id field.
01:29
It is currently set as a TV,
01:31
a throttled valve which does not change during a simulation.
01:35
You need to change it to a time controlled valve T CV.
01:39
So you can open and close it during the simulation to model a temporary shutdown,
01:44
expand the dropdown and select T CV.
01:48
You now have the option to edit the profiles field.
01:52
Click the more button with the ellipsis to open a dialogue where
01:55
you can edit the date and time of the valve opening and closing
01:59
in the table.
02:00
In the date and time column,
02:02
either expand the drop down to set the
02:04
following dates and times or type them in manually
02:08
in the first row. March 1st 2023 at midnight
02:13
in the second row, March 1st 2023 at six AM
02:18
and in the third row, March 1st 2023 at seven PM
02:24
in the opening percentage column type in the following values
02:28
in the first row, 100
02:31
in the second row zero
02:33
and in the third row 100
02:36
this means the valve is set to be fully open at midnight,
02:40
close at six AM, then open again at seven PM.
02:44
Click, OK.
02:47
In the toolbar, click save data to commit the changes you just made to the database.
02:52
Click OK? In both notifications that follow
02:56
then, right click the drain down model group and create a new run group and run
03:04
in the schedule. Hydraulic run dialogue in the title field.
03:07
Enter the name isolation base.
03:10
Enable the experimental option
03:13
with the required items.
03:14
Tab open click and drag the drain town network to the network pa in the dialogue.
03:20
In this example,
03:21
the control and demand diagram pans populate automatically because
03:25
they were previously associated with the drain town network.
03:29
Next, open the scenarios, tab
03:32
disable the base option and then enable isolation,
03:36
click save and then run
03:40
info works. WS pro does not simulate draind down by default.
03:43
So the results of this run will serve as a before snapshot for comparison later,
03:50
once the run is finished, click and drag the results to open them in the GEO plan
03:55
in the tools, toolbar,
03:56
click the graph tool and then click any hydrant downstream of the valve.
04:01
In this example, a hydrant with the asset ID 397 884 is selected.
04:08
The graph indicates a total loss in pressure at six AM when
04:12
the valve closes and pressure then returns to normal at seven PM.
04:16
After the valve opens again,
04:19
you can also select any link to view similar effects on flow.
04:24
At this time,
04:25
you have the option to run a query to find
04:27
out how many customers were isolated during this operation.
04:31
Expand the stored query group, then click and drag.
04:34
Select isolated customers to the GEO plan to run it.
04:39
This automatically selects all customers in the network
04:41
who were isolated for longer than one hour.
04:45
In this case,
04:45
every customer highlighted in red downstream of the valve is affected.
04:50
Now run the isolated customer count query.
04:53
A small grid appears in the workspace indicating
04:56
that 230 customers were isolated during the operation
05:01
in the replay toolbar. Click clear results.
05:05
Now you'll run another simulation this time with draind down enabled
05:10
double click the isolation base run to open the schedule,
05:13
hydraulic run dialogue again,
05:15
change the name to isolation, draind down and then click save.
05:21
Note that the new run displays in the model group window
05:25
in the run parameters group box,
05:27
expand the dropdown and select simulation options.
05:31
Then click the options button
05:33
in the simulation options window enable allow drain down and allow recharge,
05:40
close the window. Then click save and run in the dialogue.
05:45
Open the results by clicking and dragging them to the GEO plan
05:50
with the graph tool enabled. Click the same hydrant as you did. After the base run,
05:56
the graph shows that instead of the pressure dropping to zero,
05:59
it stops at a lower value and then gradually decreases until around six PM.
06:04
Repeat this action by graphing any link downstream
06:07
from the valve to see that flow is also
06:09
impacted during the isolation period but is not immediately
06:12
interrupted as it was in the base run.
06:15
Once again,
06:16
run the select isolated customers and isolated customer count queries.
06:21
The select isolated customers query shows far fewer customers are isolated
06:26
for longer than one hour than in the base run.
06:28
Customers not highlighted retain water pressure,
06:31
albeit lower pressure rather than losing it completely.
06:35
The isolated customer count query shows far fewer customers. Only 60.
06:39
In this case are isolated.
06:42
You can also visualize the run results using a long section
06:46
in the tools,
06:47
toolbar enable the trace and select links upstream tool and then find
06:52
the southwestern most point in the network and click to highlight it.
06:56
This runs a trace back to the water source.
06:60
Now from the windows toolbar,
07:02
click the new long section tool to view the
07:04
traced portion of the network as a long section,
07:07
right,
07:08
click the long section window and select
07:10
properties to open the section properties dialogue
07:13
for better visual clarity.
07:15
When viewing the long section disable the option to show min
07:18
max HGL lines.
07:21
Click OK.
07:23
In the long section window,
07:25
the horizontal blue line indicates the pressure level in
07:28
relation to the position within the long section.
07:32
In the replay toolbar,
07:33
click play to step through the simulation
07:35
timeline and observe how the pressure changes at
07:38
six AM when the valve is closed and then gradually decreases until seven PM.
07:44
Portions of the network immediately downstream of
07:46
the isolation lose pressure during this time.
07:49
But areas further downstream, maintain pressure
07:53
at seven PM. The isolation valve reopens and the network is recharged.
In InfoWorks WS Pro, drain down and recharge simulation options can improve the model accuracy for a situation in which a network loses pressure and is later recharged. A simulation can highlight the first and last customers to lose pressure and how long it may take to regain it. In this exercise, part of a small network is isolated for a water quality issue.
This network is supplied by a fixed head node, a pumping station to the East. To simulate drain down, close an isolation valve just downstream of the pumping station.
Start by creating a new scenario:
Next, select a valve to close:
In the Valve Object Properties panel, under Valve Control, notice the Mode ID is currently set to THV (a throttled valve), which does not change during a simulation. Change it to a time-controlled valve (TCV), which can open and close to model a temporary shutdown.
To set the valve to be fully open at midnight, to close at 6 am, and to open again at 7 pm:
Now, create a new run:
In this example, the Control and Demand Diagram panes populate automatically, because they were previously associated with the DrainTown network.
InfoWorks WS Pro does not simulate drain down by default, so the results of this run serve as a “before” snapshot for comparison later.
To graph the results:
The graph indicates a total loss in pressure at 6 am when the valve closes, and a return to normal pressure at 7 pm after the valve opens again.
To identify which customers were isolated during this operation:
All network customers isolated longer than an hour appear highlighted in red. In this case, every customer downstream of the valve is affected.
To identify the number of isolated customers:
A small grid appears, indicating that 230 customers were isolated.
Next, run another simulation, but this time, with drain down enabled:
The new run displays in the Model Group window.
To graph the results of the drain down run:
The graph shows that instead of the pressure dropping to zero, it stops at a lower value and then gradually decreases until around 6 pm.
Notice the flow is impacted during the isolation period but is not immediately interrupted, as in the base run.
The Select Isolated Customers query shows far fewer customers isolated for longer than an hour, as compared to the base run. Customers not highlighted retained lower water pressure, rather than losing it completely. The Isolated Customer Count query shows only 60 customers isolated, as compared to 230.
To visualize the run results using a long section:
In the long section window, the horizontal blue line indicates the pressure level in relation to the position within the long section.
Notice the pressure changes at 6 am when the valve is closed, and then gradually decreases until 7 pm. Portions of the network immediately downstream of the isolation lose pressure during this time, but areas further downstream maintain pressure. At 7 pm, the isolation valve reopens, and the network is recharged.