Network Analysis
Hydraulic Analysis have undertaken numerous steady and unsteady flow studies of potable water distribution networks for the majority of the major UK Water Companies. The systems we analyse are mainly pumped distribution networks and our software enables us to accurately model any flow and pressure control valves together with pumping stations.
The mathematical model is usually assembled from a third party steady flow model of the network. Once our mathematical model is completed, a detailed steady flow analysis is undertaken to compare the validity of the model against the equivalent steady flow package. We are then able to determine the flow distribution in the network with different pumping configurations and consumer flow demands.
Once we are confident that our mathematical model is an accurate representation of the system, transient investigations of pump and valve operations are undertaken to determine the severity of the maximum and minimum surge pressures which will be generated. Remedial simulations can then be undertaken to calibrate any surge suppression equipment if required. The surge suppression equipment will be calibrated to keep the maximum surge pressures within the rating of the system and/or prevent the minimum surge pressures from falling below atmospheric (sub-atmospheric pressures can result in contamination of the water supply due to ground water being drawn in to the system).
Finally, additional simulations are undertaken to improve the hydraulic performance of the system by optimising valve stroke and to recommend secure pump start/stop sequences. a detailed formal report, containing the results and recommendations of the study, is then written and issued. It is possible to verify the results of the study by carrying out site tests on the system, using specialised data acquisition software.