Describe the pump and turbine operation changes that can be simulated in InfoSurge Pro.
In InfoSurge Pro, pump and turbine operation changes can be simulated to predict and prevent potential surge events.
Changes in operating speed for pumps and turbines, changes in wicket gate openings for turbines, and unexpected trips resulting from power loss, can all produce hydraulic transients in a pipe system.
Occurs when pumping operation begins suddenly, as during a startup, and fluid is supplied to a static water column.
When a pump goes through a planned shutdown or power outage, it causes water column separation.
When the water column returns, shock pressure occurs.
Cavitation is possible following pump trips, as the flow reversal of the water column causes the collapse of any vapor cavities that may have formed.
A time-dependent change in speed ratios (operating speed/rated speed) may be defined for all types of pumps.
Pumps can also be tripped, and the resulting rundown calculated based on the pump and motor inertia and dynamic characteristics described in the pump file.
A trip can be specified with a ratchet, which prevents reverse rotation.
Pump trip and rachet changes require a pump file, which is selected in the pump surge data.
Three types of pump operation changes can be simulated in InfoSurge:
A time-dependent change in the speed ratio or the wicket gate opening may be defined for turbines.
Turbines can also be tripped—resulting rundown is calculated based on turbine inertia and dynamic characteristics described in Suter format.
Three types of turbine and wicket gate operation changes can be simulated in InfoSurge:
