How to simulate the “pressure control valve”on the pipeline in hammer?
The requirements for “pressure control valves”are as follows:
The valve opening pressure can be set. When the pressure in front of the valve is higher than the set value, the valve opens. When it is lower than the set value, the valve can automatically adjust the opening to ensure that the pressure in front of the valve is always at the set value. If the pressure in front of the valve has been lower than the set pressure, close the valve.
I have tried to use the PSV and controls, but the PSV does not meet the requirements, and the command is not executed after defining the controls.
Hello Mingqing,
The workflow above would work for the initial conditions calculation in HAMMER or in an application like WaterGEMS. More information on PSVs and how they work in WaterGEMS can be found here: How does a Pressure Sustaining Valve (PSV) work in WaterGEMS and WaterCAD? This only applies to WaterGEMS/WaterCAD or to the initial conditions in HAMMER. Logical controls will also not apply to the transient simulation.
During the transient analysis, the setting of the valve is considered fixed unless you have an operating rule applied to it. You can use an operating rule to define how the valve changes with time. If you need to see what happens when the PSV status changes, more information can be found here:
Modeling Reference - Valve Closure
Modeling an initially partially closed valve
You can also look into the modulating option, which is available for PSVs. See this link for details: Using Modulating PRV, PSV, or FCV during a transient simulation.
Regards,
Scott