Step-by-step Guide

Pumps are widely used in water supply systems, so modelling them in InfoWorks WS Pro is vital. A Pump operates on a pump curve, which governs a pump’s operating characteristics.

In this example, there is a pressure deficit in a small network. Calculations are done for the pump RPM, duty head, and duty flow required to address the issue. The next step is to add a pump curve and a pump to the network.

First, create a new scenario:

In the Scenarios toolbar, click Create scenario.
In the Create New Scenario dialog box, type the name “Pump1”.
Click OK.

Next, add a pump curve:

In the Windows toolbar, expand the Grid windows drop-down and click New links window.

In the InfoWorks WS Pro interface, the Windows toolbar with the Grid window drop-down expanded and New lines window selected, and in the workspace, the Pump1 scenario GeoPlan open.

OR, in the Window menu, select Grid windows > New links window.

A grid opens with tabs along the bottom. Green tabs contain network objects and yellow tabs indicate data objects.

Click the Pump tab.

A grid window with columns of data for network and data objects, with the Pump tab selected and called out.

In the first row of the Pump ID column, enter “Pump”.
In the cell to the left of “Pump”, double-click to open the Pump Curve page.
On the Pump Curve page, enter a Nominal Speed value of “2800”.
Enter a Nominal Flow (l/s) value of “2.8”.
In the Generate Synthetic Pump Curve group box, click the Generate button.
In the Synthetic Pump Curve Generation dialog box, expand the Method drop-down and select InfoWorks 1 Point, if it is not selected.
In the Design/Nominal row, Head (m) column, enter a value of “35”.
Click OK.

In the grid window, the Pump Curve page button highlighted in red; and in the Pump Curve page and Synthetic Pump Curve Generation dialog box, options configured and highlighted in red, with OK selected.

The Pump Curve page updates to display the generated pump curve.

The Pump Curve page updated to display the generated pump curve.

Click OK.
Close the grid window.

Next, add the pump station to the model:

In the GeoPlan, zoom into the right side of the network.
Double-click the short pipe with asset ID 102130, immediately downstream from the fixed head.
In the Properties panel toolbar, click Change type.
In the Change Object Type dialog box, select Pump Station.
Click OK.

In the Properties panel toolbar, Change type highlighted in red, the Change Object Type dialog box with Pump Station and OK selected, and in the GeoPlan, the selected pipe highlighted in red.

A red warning box appears in the Pumps row, because the created pump station needs at least one pump.

In the Pumps row, click the More (…) button.

In the Properties panel, Pump Data section, the Pumps row highlighted in red with the More (…) button selected next to the red warning box.

On the Pumps page, in the first row of the Pump Curve ID column, expand the drop-down and select Pump.
For Duty Flow (i/s), enter a value of “2.80”.
Set the Maximum Speed (rpm) to “2800”.
Set the Minimum Speed (rpm) to “1400”.
Click OK.

The Pumps page with Pump Curve ID, Maximum Speed (rpm) and Minimum Speed (rpm) entered and OK selected.

In the Properties panel, under Control Parameters, expand the Mode of Control drop-down and select PLAN (units).
Under Pump Control Data, in the Control Data row, click the More (…) button.
On the Pump Control Data page, set the Date & Time to April 20, 2020 at 00:00:00 in the proper date format for your region.
Set Pump Status Flags to 1.
Click OK.

In the Properties panel, Mode of Control and Control Data rows highlighted in red, and on the Pump Control Data page, data entered and highlighted in red, with OK selected.

Commit all changes to the database.
Click Yes in the following two notifications.
Click OK in the third notification.

Next, create a new run using the same network:

In the Scenarios toolbar, click Create scenario.
In the Create New Scenario dialog box, enter a name for the run. In this example, the name is “Pump Plan”.
Open the Scenarios tab.
Make sure only Pump1 is active.
Select Experimental.
Click Run.

In the Schedule Hydraulic Run dialog box, Scenarios tab, options configured and highlighted in red, and Run selected.

To view the results:

Once the run is complete, from the Model Group window, under Pump Plan, drag-and-drop Pump Stations Control into the workspace.
Zoom into the area of the network with the added pump station.
In the Model Group window, under Selection List Group, drag-and-drop the LongSection selection list into the results GeoPlan.
In the Windows toolbar, click New long section.

Notice in the long section window that adding the pump station dramatically raised the hydraulic grade line, providing more than enough pressure.

In the Windows toolbar, the New long section selected and highlighted in red, and in the workspace, a long section window displaying a raised hydraulic grade line with the new pump.

Modelling pumping stations in InfoWorks WS Pro

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