Dear Bentley Team,
I would like to ask location of surge tank. I am supplying water through pumping. There are high and low points in pipeline profile. Picture is attached. If I provide surge tank near pump station then low would be critical as water will come from upstream and downstream both.
Should I provide two surge tanks, one near pumping station and one at low point about 5km far from pump station in order to protect pipeline.
communities.bentley.com/.../HGL-Profile.PNG
Regard,
SA
Syed,
Every situation is different and there may not be a "rule of thumb" for placement of surge protection that works for all situations. There are many other considerations such as space requirements, budget and other local constraints.
I would recommend utilizing the scenarios and alternatives functionality to try out different placement and combination of surge protection and compare the results to help you choose the right approach. See:
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Hello Sushma,
Thanks for your reply. I have developed two scenarios one base model and second surge tank near pump station. At low point my pressure is almost three times of working pressure. I would like to ask installing surge tank or installing PRV which is better option.
Hello Syed,
The placement of surge tank should be generally near the pumps to keep the water column moving upon pump shutdown. We would suggest you first to create 3 different scenarios, one with no protection, second with surge tank near pump and third with 2 surge tanks. first scenario will give you an idea about where are the worst pressures happening where you need surge mitigation devices and second scenario will dictate if another surge mitigation device is required in the model or not and see how implementation protection in the system improves the results.. By comparing results between these 3 scenarios you can take better decision.
Modeling Reference - Surge Tanks
How are you dealing with high pressures at the low point for hydraulic modeling before performing transient analysis? Is the pressure at low point under acceptance criteria for high pressure? Is there any PRV in place?
Sushma Choure
Bentley Technical Suppport