Fire Flow Scenarios are used to determine, at selected hydrants:
a. the Available Flow at user set Pressures and
b. the Pressure remaining at a user set Rate of Flow.

Parameters are set in Options > Fire Flow Tab.

A selected group of Hydrants can be tested running one at a time if "FireFlow-Each" is chosen OR running together if "FireFlow-All" is chosen under the Control Column.

Fire Flow Scenarios can be set in the Scenario Engine in any one of 3 ways. They are created in the Scenario Tab of the HydrauliCAD Palette

As Fire Flow is, in effect, just another scenario, you may wish to review the Scenario Interface Components and the Construct a Scenario Tutorial Video sections for specific construction methods.

Hydraulic Zones, Pipe Groups and System Results

a. For each node (or a set of nodes), if a hydraulic zone exists for that node, it finds all other nodes in that zone, and then checks pressures at all nodes in that zone to see if they have less pressure than minimum pressure set for the zone.

b. For pipe groups, (or a set of pipes), if a Pipe Group exists for that pipe, it finds all other pipes in that group, and then checks all pipes in that group to see if they have velocity greater than maximum set for the zone.

c. For System, it checks all objects in the system.

If you wish to not check for these results, merely enter a value that is out of the realistic operational range.

1. A Fire Flow only Scenario where another scenario is not in play.

Choose "FireFlow-Each" OR "FireFlow-All" in the Control Column

Select the Hydrants (any junction can be used) in the drawing via manual selection, Quick Select, or a Saved Selection Set, Click "Copy Selected Objects" Button and they will be placed in the "Objects" Column. You can type IDs in separating them with a comma.

The above Fire Flow is ready to run by clicking "Run Analysis" Icon on the main toolbar.

Check results on the Report Tab Page.

2. A Fire Flow Scenario added into an existing scenario.

In this case, the user used "Save As" to create new scenario and added a Fire Flow line to it, calling it "existing scenario FF"

The top "DO" line added to the existing scenario causes the existing Time Step Scenario to produce Fire Flow results for each time step, for the junctions selected.

When "Dynamic" is set on the Status Bar, Fire Flow will be run for each time step and Report will show results accordingly.

3. A Fire Flow Scenario with an attached existing scenario.

In this alternative method, instead of all details of the existing scenario included, the user merely set "Scenario" in the Control Column, and selected the desired existing scenario from the combo list in the Value Column.

This method will run exactly as the above # 2 Method showing all details of the existing scenario.