Hi,
I would like to ask, how do I model a variable frequency drive (VFD) paired with a submersible pump? I have a 24-hour data of different pressure and flow reading.
Thank you
The wiki for modeling a submersible pump explains how to set up a submersible pump layout. For a VFD pump set the property of the pump for "Is Variable Speed Pump?" to "True", set the VSP Type to "Target Head", set the Target Head Type to "Pressure", and set the Pressure Target to either 45 psi or 20 psi depending on when the simulation start time takes place. If the control node is on the suction side of the pump set the property for "Control node is on the suction side? to "True". To change the Pressure(Target) during either the peak hours or off peak hours a control will need to be set. The wiki here describes how to set controls. For example, the controls for this system might be like this:
IF Clock Time >= 9:00 PM THEN PMP-1 Pump Pressure (Target) = 20.00 psi
IF Clock Time < 9:00 PM THEN PMP-1 Pump Pressure (Target) = 45.00 psi
Regards,
Mark
Just a quick note regarding the VSP target control - this is available starting with the CONNECT Edition of WaterCAD and WaterGEMS. See more here:
Using controls to change the target pressure / HGL setting of a variable speed pump
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.