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Transcript
00:04
Info
00:04
works. WS pro allows you to simulate forced fire flows in a network.
00:09
You can specify a hydrant where a set of user defined fixed flows will be extracted.
00:15
You can then apply the flows consecutively.
00:17
And the network is tested for velocity and pressure constraints
00:22
where the constraints are violated,
00:23
the point is deemed to have failed and the maximum available flow is reported.
00:28
This type of simulation can determine if customers will still
00:31
be able to get water during a fire response.
00:35
It can also give you an idea of what improvements
00:38
or additions you need to make to a network.
00:40
So a hydrant can provide enough water during an emergency
00:44
to begin from the model group window.
00:46
Click and drag the network into the workspace to open it.
00:51
Then in the model group window, right,
00:53
click run group and select new run to open the schedule.
00:57
Hydraulic run dialogue
00:59
title, the new run F F and then check the box next to experimental
01:06
click and drag network control and demand
01:09
diagram to their respective boxes in the dialog
01:13
in the run type group box, expand the dropdown and select firef flow.
01:19
The firefly options dialogue opens
01:22
in the type of simulation group box, make sure forced firef flow is enabled.
01:27
Note that there are options for selecting hydrants
01:30
in the firef flow node location group box.
01:33
You can click the choose location on GEO
01:35
plan button which prompts you to pick a hydrant in the GEO plan.
01:39
Picking one automatically populates the use existing
01:42
node dropdown with the hydrants ID number.
01:45
And when you expand that drop down, you can choose from a list of all hydrant I DS.
01:50
If you prefer.
01:52
In this example, hydrant
01:54
T 29361601 is selected
01:58
at this time,
01:59
you must populate the grid in the test flows group box with flow values to test
02:04
depending on the project, you may have a list of flows provided to you
02:10
for this exercise type in the following values and
02:13
press enter after each starting in the first row.
02:27
in the failure criteria group box. Make sure the maximum velocity is set to four.
02:33
Adjust the minimum firef flow node pressure to 12,
02:36
set the minimum system pressure to 10
02:39
click to enable the checkbox next to apply constraints to demand nodes only
02:44
click. OK.
02:46
Then in the schedule, hydraulic run dialogue, click save and run
02:52
in the model group window.
02:53
Find the F F run and expand it to view the results of
02:57
each of the various flows that were tested as well as a summary,
03:01
right, click summary and click open as
03:05
then choose forest firef flow report and click. OK.
03:10
A grid opens showing the summary results for all tested flows.
03:14
Inspect the table and check the number of
03:16
test flows that passed the failure criteria.
03:19
Note that the max velocity criteria in this exercise would be disregarded since the
03:24
max velocity pipe is a short incoming pipe into one of the pump stations.
03:29
Right?
03:29
Click on any row and then select hydrant curve
03:32
flow versus residual pressure using assumed hydrant characteristics,
03:38
change the hydrant testing time to May 2nd 2022 at 10 AM,
03:42
which is the minimum pressure time at the hydrant node and rerun the simulation
03:49
check the number of test flows that passed the failure criteria.
00:04
Info
00:04
works. WS pro allows you to simulate forced fire flows in a network.
00:09
You can specify a hydrant where a set of user defined fixed flows will be extracted.
00:15
You can then apply the flows consecutively.
00:17
And the network is tested for velocity and pressure constraints
00:22
where the constraints are violated,
00:23
the point is deemed to have failed and the maximum available flow is reported.
00:28
This type of simulation can determine if customers will still
00:31
be able to get water during a fire response.
00:35
It can also give you an idea of what improvements
00:38
or additions you need to make to a network.
00:40
So a hydrant can provide enough water during an emergency
00:44
to begin from the model group window.
00:46
Click and drag the network into the workspace to open it.
00:51
Then in the model group window, right,
00:53
click run group and select new run to open the schedule.
00:57
Hydraulic run dialogue
00:59
title, the new run F F and then check the box next to experimental
01:06
click and drag network control and demand
01:09
diagram to their respective boxes in the dialog
01:13
in the run type group box, expand the dropdown and select firef flow.
01:19
The firefly options dialogue opens
01:22
in the type of simulation group box, make sure forced firef flow is enabled.
01:27
Note that there are options for selecting hydrants
01:30
in the firef flow node location group box.
01:33
You can click the choose location on GEO
01:35
plan button which prompts you to pick a hydrant in the GEO plan.
01:39
Picking one automatically populates the use existing
01:42
node dropdown with the hydrants ID number.
01:45
And when you expand that drop down, you can choose from a list of all hydrant I DS.
01:50
If you prefer.
01:52
In this example, hydrant
01:54
T 29361601 is selected
01:58
at this time,
01:59
you must populate the grid in the test flows group box with flow values to test
02:04
depending on the project, you may have a list of flows provided to you
02:10
for this exercise type in the following values and
02:13
press enter after each starting in the first row.
02:27
in the failure criteria group box. Make sure the maximum velocity is set to four.
02:33
Adjust the minimum firef flow node pressure to 12,
02:36
set the minimum system pressure to 10
02:39
click to enable the checkbox next to apply constraints to demand nodes only
02:44
click. OK.
02:46
Then in the schedule, hydraulic run dialogue, click save and run
02:52
in the model group window.
02:53
Find the F F run and expand it to view the results of
02:57
each of the various flows that were tested as well as a summary,
03:01
right, click summary and click open as
03:05
then choose forest firef flow report and click. OK.
03:10
A grid opens showing the summary results for all tested flows.
03:14
Inspect the table and check the number of
03:16
test flows that passed the failure criteria.
03:19
Note that the max velocity criteria in this exercise would be disregarded since the
03:24
max velocity pipe is a short incoming pipe into one of the pump stations.
03:29
Right?
03:29
Click on any row and then select hydrant curve
03:32
flow versus residual pressure using assumed hydrant characteristics,
03:38
change the hydrant testing time to May 2nd 2022 at 10 AM,
03:42
which is the minimum pressure time at the hydrant node and rerun the simulation
03:49
check the number of test flows that passed the failure criteria.
InfoWorks WS Pro allows you to simulate forced fire flows in a network. Users can specify a hydrant where a set of user-defined fixed flows will be extracted. The flows are then applied consecutively, and the network is tested for velocity and pressure constraints. Where the constraints are violated, the point is deemed to have failed and the maximum available flow is reported.
This type of simulation can determine if customers will still be able to get water during a fire response. It can also give you an idea of what improvements or additions you need to make to a network so a hydrant can provide enough water during an emergency.
The Fire Flow Options dialog box opens.
A grid opens, showing the summary results for all tested flows.
Note: The max velocity criteria in this exercise is disregarded, since the max velocity link is a short incoming pipe into one of the pump stations.
To see the results as a hydrant curve: