Hi All,
I am facing a problem while running steady state system.
Actually, I need to deliver flow to the tank by putting pump.
My question is how Water Gems calculate the flow from the pump when we put a tank. What are the factors that draw volume of water towards the tank through pump?
Example case:
For the system required head is 320 m and flow 1250 gpm, which I defined in pump definition, the flow change from 1250 gpm to 1274 gpm in case of tank. If I replace tank with junction by putting demand of 1250 gpm. Exact flow will withdraw by pump but this isn't the case for tank.
Example image is attached for refrence.
please, elaborate this.
Thanks
Hello Ammar,
When you are putting junction instead of tank with fixed demand of 1250 gpm, then WaterGEMS being demand driven software that fixed demand will be supplied. So you are getting fixed flow of 1250 gpm through pump when you put junction as end node.
However when you put tank instead of junction then flow supplied by pump will be equal to flow corresponding to head (In pump curve/definition) required by pump to deliver flow into tank. So lets say head required by pump is 50 m then corresponding flow to be delivered will be based on your pump curve. For steady state tank HGL = tank initial level. Which is explained in below wiki.
Understanding Tank Operating Range
Regards,
Sushma Choure
Bentley Technical Suppport
Answer Verified By: Ammar khan
thanks, its works.