I am trying to analyze a power outage from 2-8pm. I need to know how long will it take for the system to recover if there is a power outage from 2-8pm. How can you simulate this using watercad?
Set up time controls to turn the pumps off at 2 and back on at 8 using time-based controls.
There may be some parts of the system that are "disconnected" during this time, indicating that they are empty. If this happens, you may need to start a "recovery" run at 8 to look at refill using tanks that are virtually empty as the initial condiiton.
How exactly do you do it. I am new to the program and I can't figure out how to do it.
Gabriela,
Tom, gave you the basic concept how to do it and nkg2 suggested things to consider.
Here is another basic steps:Components > Controls Create couple of controls to turn pump on and pump off at certain time. If Clock Time >= 2 PM AND Clock Time <= 8 PM Pump-1 status Off If Clock Time >8 PM and Clock Time < 2 PM Pump-1 status OnWith the above control your pump -1 will stay Off from 2 to 8 PM and turn back on outside the interval.
This link will help you understand/crate the controls in the modelhttp://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/creating-controls-conditions-actions-and-control-sets-tn.aspxNote: Above steps are just off the top of my head
For the control to turn the pump on after 8 PM and before 2, you'll need to use the OR operator. Or, consider adding an ELSE to the other control:
If Clock Time >= 2 PM AND Clock Time <= 8 PM Pump-1 status Off ELSE Pump-1 status On.
If you're new to WaterCAD/WaterGEMS, I would recommend following the quick start lessons included in the Help documentation. We also have training courses available (see your Bentley Account Manager.)
As a side note, a transient analysis may be warranted when simulating a pump power failure. This can be done using our specialized HAMMER product (training strongly recommended).
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.