Identifying pump requirements

00:02

Info

00:03

works W S pro allows you to model pumps and pump curves,

00:07

pumps are widely used in water supply systems.

00:11

Pumps operate on a pump curve which contain

00:13

operating characteristics like head and power consumed.

00:17

The pump curve provides a relationship between the flow head and electric

00:22

power to determine the nominal actual and minimum maximum speed curves,

00:27

power curves and efficiency curves.

00:31

In this example,

00:32

you will be working in a small network modeled with a fixed head

00:35

supply to the east representing a reservoir with a top water level tw

00:39

of 75 m.

00:42

The T W

00:42

L of the reservoir does not provide enough pressure alone to supply the network.

00:47

So you must determine how much pressure is needed to address the problem.

00:52

First, open a new transportable database

00:56

from the file tab click open open transportable database.

01:00

Navigate to and open the file identifying pump requirements dot WPT

01:06

from the transportable database window,

01:08

right, click pump station and select copy

01:13

in the model group window,

01:14

right? Click the database and select paste pump station with Children

01:20

now,

01:21

right? Click the pump stations network and select associate control,

01:26

click and drag the control and demand diagram.

01:29

Pump stations control and pump stations average demand to

01:32

their respective areas in the associate control dialogue.

01:37

Click ok. And then open the pump stations network.

01:43

First you will run the model to see what the results are.

01:47

Right. Click the pumps model group and select new run group.

01:52

Click ok. To accept the default name

01:56

then

01:56

right click the run group and select new run

02:01

in the schedule. Hydraulic run dialogue in the title field type in base

02:06

click and drag the Newtown network to the network area in the dialogue,

02:12

click run.

02:14

Then in the model group window,

02:16

click and drag then results into the GEO plan to open them

02:22

zoom into the far right area of the network.

02:26

Click the link immediately downstream from the fixed head,

02:29

which is represented by a blue triangle icon to select it.

02:34

Then in the toolbar, click the long section pick button

02:38

with the tool active, click the next link downstream.

02:42

As soon as you do, the long section appears below the model.

02:46

This tool continues to trace along the network

02:48

in that direction until it reaches a junction,

02:52

continue to trace the links as seen in this example. Until you reach node 101204. Fr

02:60

you can see that as you click each node, the long section continues to be built

03:04

to avoid having to manually retrace this long section.

03:07

You can create a new selection list by right clicking selection list group.

03:11

In the model group window and picking new selection list,

03:16

choose a name for it and then click ok.

03:20

Alternatively, after tracing the desired section,

03:23

you can click the new long section button in the toolbar

03:26

in the toolbar, click the select tool to reactivate it.

03:30

Click somewhere in the GEO plan to deselect the long section

03:35

in the long section window.

03:37

Observe how the hydraulic profile of the section reads from right to left with the

03:41

fixed head on the right and the end of the section on the left,

03:46

if you prefer the long section window to

03:48

display the hydraulic profile from left to right,

03:50

click the flip view button.

03:54

There are many display options for the long section window.

03:58

Right? Click in an empty part of the window and select properties

04:02

in the section properties. Dialogue. There are two tabs content and layout.

04:07

There are several customizable fields here including scaling

04:11

labels,

04:12

typeface and colors which you can use to change what is shown in the long view.

04:18

For example,

04:19

the strip plan is the line with icons representing

04:22

the different objects and nodes along the section path

04:25

in the content tab deselect the checkbox next to show strip plan and then click apply

04:31

and observe how the strip plan disappears from the top of the long section window,

04:36

click the check box again

04:38

and then click apply to turn the strip plan back on.

04:42

You can use the graph tool and click those icons to graph the results

04:47

in the long section window.

04:48

You can see that the blue hydraulic grade line is

04:51

showing that there is insufficient water supply in the network.

04:55

This is represented by areas where the grade line is below the ground level.

04:60

With this information,

05:01

you can start to design a pump curve

05:03

and determine the characteristics of your pump station.

Video transcript

00:02

Info

00:03

works W S pro allows you to model pumps and pump curves,

00:07

pumps are widely used in water supply systems.

00:11

Pumps operate on a pump curve which contain

00:13

operating characteristics like head and power consumed.

00:17

The pump curve provides a relationship between the flow head and electric

00:22

power to determine the nominal actual and minimum maximum speed curves,

00:27

power curves and efficiency curves.

00:31

In this example,

00:32

you will be working in a small network modeled with a fixed head

00:35

supply to the east representing a reservoir with a top water level tw

00:39

of 75 m.

00:42

The T W

00:42

L of the reservoir does not provide enough pressure alone to supply the network.

00:47

So you must determine how much pressure is needed to address the problem.

00:52

First, open a new transportable database

00:56

from the file tab click open open transportable database.

01:00

Navigate to and open the file identifying pump requirements dot WPT

01:06

from the transportable database window,

01:08

right, click pump station and select copy

01:13

in the model group window,

01:14

right? Click the database and select paste pump station with Children

01:20

now,

01:21

right? Click the pump stations network and select associate control,

01:26

click and drag the control and demand diagram.

01:29

Pump stations control and pump stations average demand to

01:32

their respective areas in the associate control dialogue.

01:37

Click ok. And then open the pump stations network.

01:43

First you will run the model to see what the results are.

01:47

Right. Click the pumps model group and select new run group.

01:52

Click ok. To accept the default name

01:56

then

01:56

right click the run group and select new run

02:01

in the schedule. Hydraulic run dialogue in the title field type in base

02:06

click and drag the Newtown network to the network area in the dialogue,

02:12

click run.

02:14

Then in the model group window,

02:16

click and drag then results into the GEO plan to open them

02:22

zoom into the far right area of the network.

02:26

Click the link immediately downstream from the fixed head,

02:29

which is represented by a blue triangle icon to select it.

02:34

Then in the toolbar, click the long section pick button

02:38

with the tool active, click the next link downstream.

02:42

As soon as you do, the long section appears below the model.

02:46

This tool continues to trace along the network

02:48

in that direction until it reaches a junction,

02:52

continue to trace the links as seen in this example. Until you reach node 101204. Fr

02:60

you can see that as you click each node, the long section continues to be built

03:04

to avoid having to manually retrace this long section.

03:07

You can create a new selection list by right clicking selection list group.

03:11

In the model group window and picking new selection list,

03:16

choose a name for it and then click ok.

03:20

Alternatively, after tracing the desired section,

03:23

you can click the new long section button in the toolbar

03:26

in the toolbar, click the select tool to reactivate it.

03:30

Click somewhere in the GEO plan to deselect the long section

03:35

in the long section window.

03:37

Observe how the hydraulic profile of the section reads from right to left with the

03:41

fixed head on the right and the end of the section on the left,

03:46

if you prefer the long section window to

03:48

display the hydraulic profile from left to right,

03:50

click the flip view button.

03:54

There are many display options for the long section window.

03:58

Right? Click in an empty part of the window and select properties

04:02

in the section properties. Dialogue. There are two tabs content and layout.

04:07

There are several customizable fields here including scaling

04:11

labels,

04:12

typeface and colors which you can use to change what is shown in the long view.

04:18

For example,

04:19

the strip plan is the line with icons representing

04:22

the different objects and nodes along the section path

04:25

in the content tab deselect the checkbox next to show strip plan and then click apply

04:31

and observe how the strip plan disappears from the top of the long section window,

04:36

click the check box again

04:38

and then click apply to turn the strip plan back on.

04:42

You can use the graph tool and click those icons to graph the results

04:47

in the long section window.

04:48

You can see that the blue hydraulic grade line is

04:51

showing that there is insufficient water supply in the network.

04:55

This is represented by areas where the grade line is below the ground level.

04:60

With this information,

05:01

you can start to design a pump curve

05:03

and determine the characteristics of your pump station.

Video quiz

When you need to design a pumping station, creating a long section of the pipes in a network helps you to do which of the following?

(Select one)
Select an answer

1/1 questions left unanswered

Step-by-step Guide

InfoWorks WS Pro allows you to model pumps and pump curves. Pumps operate on a pump curve, which contains operating characteristics like head and power consumed. The pump curve provides a relationship between the flow, head, and electric power to determine the nominal, actual, and minimum/maximum speed curves, power curves, and efficiency curves.

This example assumes a small network modelled with a fixed head supply to the east, representing a reservoir with a top water level (TWL) of 75mAD. The TWL of the reservoir does not provide enough pressure alone to supply the network. The goal is to determine how much pressure is needed to address the problem.

First, open a new transportable database:

  1. From the File menu, click Open > Open transportable database.
  2. In a file browser window, open Identifying Pump Requirements.wspt.
  3. From the transportable database window, right-click Pump Station Model and select Copy.

In the transportable database window, the Pump Station Model shortcut menu with Copy selected.

  1. In the Model Group window, right-click Database and select Paste: Pump Station Model(with children).
  2. Right-click Pump Stations Network and select Associate control.
  3. Drag the Pump Stations Control into the Associate Control dialog box and drop it in the Control group box.
  4. From the Model Group window, under Demand Diagram Group, drag Pump Stations Average Demand into the Associate Control dialog box and drop it in the Demand group box.
  5. Click OK.

The Associate Control dialog box with Pump Station Control and Average Demand in their respective group boxes, and OK selected.

  1. From the Model Group window, drag-and-drop Pump Stations Network into the workspace to open the GeoPlan.

To run the model and see the results:

  1. In the Model Group window, right-click Pump Station Model and select New > Run Group.
  2. Click OK to accept the default name.
  3. Right-click Run Group and select New > Run.
  4. In the Schedule Hydraulic Run dialog box, in the Title field, type “Base”.
  5. From the Model Group window, drag Pump Stations Network into the Schedule Hydraulic Run dialog box and drop in the Network group box.
  6. Click Run.

In the Schedule Hydraulic Run, options configured and Run selected and called out; and in the background, the Pump Stations Network GeoPlan.

Next, create a long section:

  1. From the Model Group window, drag-and-drop Pump Stations Control into the GeoPlan to open the results.
  2. In the GeoPlan, zoom into the far-right area of the network.
  3. Click the link immediately downstream from the fixed head, which is represented by a blue triangle icon, to select it.
  4. In the Tools toolbar, click the Long section pick button.
  5. Click the next link downstream to select it.

The long section appears below the model. This tool continues to trace along the network in that direction until it reaches a junction.

In the Tools toolbar, the Long section pick button highlighted in red, in the GeoPlan, a zoomed-in view with two links selected, and below the model, the long section window.

  1. Continue to trace the links until you reach node 101204FR.

As you click each node, the long section continues to be built.

In the GeoPlan, links traced and highlighted in red, and below, the long section window built to match the selection.

To avoid having to manually re-trace this long section, create a new selection list:

  1. In the Model Group window, right-click Selection List Group and pick New > Selection List.
  2. In the New Name – Selection List dialog box, enter a name.
  3. Click OK.
  4. Alternatively, after tracing the desired section, in the Tools toolbar, click the Long section pick button.
  5. In the Tools toolbar, click the Select button.
  6. Click a blank area in the GeoPlan to deselect the long section.

In the long section window, the hydraulic profile reads from right to left, with the fixed head on the right.

  1. To switch to a left-to-right view, click the Flip view button.

The long section window with Flip view selected and highlighted in red, and the fixed head now on the left.

To open more display options for the long section window:

  1. Right-click an empty part of the window and select Properties.

The Section Properties dialog box includes several customizable fields, including scaling, labels, typeface, and colors. For example, the strip plan is the line with icons representing the different objects and nodes along the section path.

  1. In the Content tab, deselect Show Strip Plan.
  2. Click Apply.

The strip plan disappears from the top of the long section window.

The Section Properties dialog box, Content tab with Show Strip Plan deselected and highlighted in red, and the long section window without the strip plan.

To turn the strip plan back on:

  1. Enable Show Strip Plan.
  2. Click Apply.

Tip: Use the Graph tool and click the strip plan icons to graph their results.

In the long section window, the blue hydraulic grade line shows insufficient water supply in the network, represented in areas where the grade line is below ground level. This information is useful for designing a pump curve and determining the characteristics of your pump station.

In the long section window, a highlighted area of insufficient water supply in the network, as indicated by the blue hydraulic grade line below ground level.

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