We undertake comprehensive pressure surge analysis studies in which we identify potential pressures surge scenarios, identify under what conditions these are the most extreme, and computationally quantify the severity of these scenarios.
As required we investigate means for mitigation, and use parametric analyses to optimise these solutions for their effectiveness and their cost effectiveness.
Our surge analysis reports will explain the hydraulic phenomena and the mitigation and will include full conclusions and detailed recommendations for action.
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How can you determine whether pressure surge is going to cause a problem?
This depends on the nature of the transient, and the system on which it acts. An experienced surge (transient) analyst can get a good understanding for whether a system is likely to have a problem or not by doing some simple calculations, and observing the system profiles. It is essential to have a thorough understanding of the physics of pressure surge in order to do this.
Peter Glover Consulting offer a pressure surge training course that can enable your experienced hydraulic engineers to consider their designs from a pressure surge perspective. This enables designers to determine whether a full surge analysis is required, and what type of solutions are appropriate. In addition, it enables designers to undertake preliminary design of potential pressure surge control solutions.
For situations in which problems are anticipated, it is necessary to undertake computer modelling of the network. It is important that this is undertaken under expert guidance as a large number of computer modelling results can easily hide potential pressure surge catastrophes.
What causes a Pressure Surge (Hydraulic Transient)?
Anything that causes an immediate change in flow velocity, causes a pressure surge. This pressure surge is called a hydraulic transient.
A hydraulic transient (pressure and flow surge) continues until the system settles down to a new steady state condition ( water flowing steadily or not). Problem transients or pressure surge are often caused by the starting and stopping of pumps, rapid valve closure, air entrainment, check valves, air valves, even surge anticipating valves, guide vane closure, generator load rejection, turbine startup, and a myriad of other causes. Typical Surge Scenarios
A transient will typically propagate throughout a system. At a given position on a network a variety of different transient pressures and velocities can superimpose causing more extreme events.
