I am putting together a water distribution model in which my distribution system has two elevated storage tanks (in town X). A nearby city (Y) provides water to town x via 3 booster pump stations (with two pumps per station) operated by town X.
I have pump curves for each of the pumps, however I am unsure how I would set the up the pumps in watercad. I have attached the booster pump setup schedule below, but not sure where to start in implementing this into watercad.
thanks.
First you can input the pump curves information for respective pumps in the Components > Pump Definitions.
Then you can layout the pumps , pump stations along with other model elements like tanks, valves, reservoirs etc. How to associate pumps with the pump station is explained below. Define pump definition in the respective pump properties.
How do you associate a pump to a pump station?
How do you model a booster pump in WaterGEMS/WaterCAD?
There are several sample models located at C:\Program Files (x86)\Bentley\WaterGEMS\Samples, to get an idea from.
Regards,
Sushma Choure
Bentley Technical Suppport
I understand how to assign pump curves/pump definitions, however I am unsure how to set up controls. Not all the pumps run at the same time, as they are set up based on tank levels. I attached a pump set up details but not sure how to implement this into watercad. Do we only assign controls in an Extended Period Simulation (EPS)? What if we are running a steady state run?
In the screenshot it is seen that on and off levels of the pumps are mentioned which could be based on tank levels.
Then you would need to set those up in controls like if tank level is X then turn the pump ON, OFF likewise. However if you wish to run steady state simulation then make sure to use simple controls. Difference between logical and simple controls is explained below.
Simple Controls vs. Logical Controls
Here is an example of simple controls, for your reference.
However screenshot also shows time to turn the pumps on and off for that you would need to use EPS run only.
Using "Clock Time" and "Time From Start" Controls
Typically for a steady state you would simply set the pump status to what it should be based on the initial tank levels, or as Sushma said, you can use Simple Controls and choose "true" for the calculation option "Use simple controls during steady state?".
See also:
Using Controls, Conditions, Actions and Control Sets in WaterGEMS and WaterCAD
Easy pump control creation with the Control Wizard
WaterGEMS/WaterCAD Fundamentals Part 17: Extended Period Simulations
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Sushma Choure said:tank level is X then turn the pump ON, OFF
then how do I specify when the pump should turn off.