• InfoWorks WS Pro

Simulating hydrant testing using GMR

Perform hydrant testing using GMR.


Tutorial resources

These downloadable resources will be used to complete this tutorial:

iwsp2023M16U08_GMR_Hydrant_Test_Sim.wspt

Step-by-step guide

In InfoWorks Pro, a GMR configuration has been created to test whether each hydrant in a network can provide the required fire flow when it is at the lowest pressure. The next step is to simulate the hydrant testing exercise.

  1. In the Model Group, right-click the Run Group.
  2. Select New > Run.
  3. In the Schedule Hydraulic Run dialog box, name this run “GMR Hydrant Testing”.
  4. Select Experimental.
  5. From the Model Group, drag the Network into the Schedule Hydraulic Run dialog box and drop it into the Network group box.
  6. Expand the Run Type drop-down and select Fire Flow.

The Schedule Hydraulic Run dialog box displays with the parameters set for the GMR Hydrant Testing run.

  1. In the Fire Flow Options dialog box, under Type of simulation, select Hydrant Testing.

The Fire Flow Options dialog box with Hydrant Testing being selected.

The dialog box expands with more options.

  1. From the Model Group, drag the Hydrants selection list into the Fire Flow Options dialog box and drop it into the Selection List box.
  2. In the Model Group, expand Fire Flow Group.
  3. Drag Fire Flow and drop it into the Fire Flow box.

In the InfoWorks WS Pro interface, a red arrow shows the path of the Fire Flow object being dragged from the Model Group into the Fire Flow box of the Fire Flow Options dialog box.

  1. In the Fire Demand Data group, set the Measurement Delay to 15 minutes.
  2. In the Options section, enable Apply constraints to demand nodes only.
  3. Enable Calculate Pressure at Min and Max Fire Flow.
  4. Enable Calculate Open Hydrant Flow.
  5. Enable Calculate Hydrant Curves.
  6. In the Test Flows list, in the first row, enter a value of 5 l/s.
  7. In the next five rows, enter the following test flows: 10, 15, 20, 25, and 30 l/s.
  8. Click OK.

The expanded Fire Flow Options dialog box with Options selected, a list of Test Flows entered, and OK selected.

  1. Back in the Schedule Hydraulic Run dialog box, under Run Type, enable Generalised Multi Run.

A Generalised Multi Run Options popup appears.

  1. From the Model Group, drag the Hydrant Testing GMR into the popup and drop it into the Generalised Multi Run Config box.
  2. Click OK.
  3. In the Schedule Hydraulic Run dialog box, click Save.

To run the simulation and view the results:

  1. Click Run.
  2. In the Model Group, expand GMR Hydrant Testing.
  3. Right-click Control and select Open as.

In the Model Group, under GMR Hydrant Testing, the Control shortcut menu with Open as being selected.

  1. In the Select Results popup, with Summary report selected by default, click OK.

The summary report produced by the GMR, with results for each hydrant, including the fire flow at which the test failed and the time of lowest pressure.

The GMR produces a summary report with test results for all the options selected in the Fire Flow Options dialog box. It indicates the fire flow at which the test failed, and it stipulates the time at which the test was run, which is the time of the lowest pressure at each hydrant.