The observed pressure at any point in a pipeline is determined by several factors:

  • The flow head loss from the reservoir or pump station supplying the network
  • Pressure transient events
  • The total (or static) head, due to pipeline elevation.

When comparing measurements made at multiple points on the network, the total head differences can easily dominate and mask more subtle information like the flow head loss or transient wave attenuation.

Syrinix RADAR cloud-based user platform features a 'Total Head Pressure View'.

This removes the effect of the static head from the pressure display, allowing a much clearer comparison of flow head loss and pressure transient events from multiple sites.

 

Impact of transients

“Because our users like to use RADAR to analyse pressure data, having the total head view available means that they can do more in one place; view GIS data, analyse transients, display pressure in total head.

When trying to understand what is going on in a water network, this is extremely critical."

Ben Smither, Syrinix VP of Engineering

The Total Head Pressure View feature is useful for clients with more than one PIPEMINDER monitoring device in the same pressure zone and adjustments can easily be made and displayed.

Static head adjustment makes it easier for users to display the data in a way that they want, without having to export the data from RADAR and manually offset the pressure from each monitoring point by the elevation of that site.

Pressure data across a drinking water network could vary from 2 to 25 bar or more. In order to show a bit range of pressure data, the Y-axis needs to be stretched, which results in a decrease in the resolution of changes across the same axis.

As the total head should be roughly the same at all points in a DMA which does not have pressure regulating assets, pressure data “squeezes” and allows variations in the Y-axis to be visualised better.

 

Graph displaying total head

As an example, one can see head loss due to moving of water in a direction, reduction/increase of pressure due to valve operation, etc

This feature was developed following a request from Cobb County Marietta Water Authority who asked if static head could be removed from the pressure display so that flow headloss and transients can be more easily compared.

Adjusting and adding site elevation to accommodate pressure changes give utilities a much better understanding of how their network is functioning.

With advanced insights, utilities can make better decisions about their operations, decisions that save time and money by reducing leaks and bursts and extending the life of equipment and infrastructure.

For more information about how to best use your Total Head Adjustment feature, contact your Syrinix support team

 

Graph showing total head

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