Hello,
I am facing a problem to set my PRV in the network. I have a network whose topography is a bit sharp and the difference in levels is high. I am fixing PRVs as the pressure exceeded 6 bars. but at some location it seems the PRV just does not produce the required pressure.
I have attached my model as wMODL.zipell.
regards
Thanks for sharing the model. The auxiliary results section of the fireflow alternative is not configured to save auxiliary results for your pipes, so results will be "N/A" for all elements when clicking nodes in the fire flow results browser.
See related article about this: Results show as "N/A" when clicking a node in the Fire Flow Results Browser
As an example, if I create a selection set of all elements in the model, select it as the Auxiliary Output Selection Set and select "All nodes" for the results type:
... then the results will be saved and you will be able to see velocities in pipes when clicking a fireflow node in the fireflow results browser.
For example in the fireflow flextable, the fire flow node "J-1" shows "Velocity of maximum pipe" as 3.38 m/s and the "Pipe w/ maximum velocity" as P-336. If you click J-1 in the fireflow results browser, open the pipe flextable and sort on the Velocity result field, you will see that the maximum velocity is indeed 3.38 m/s, in a few pipes including P-336:
Looking at the model plan view, these high velocity pipes are located at the source, where all of the flow is passing through 227 mm pipes that connect to the source reservoir. It looks like these pipes may be too small to handle the desired fire flow along with the other demands in the model.
Note that the fire flow alternative is not configured to use velocity as a constraint. If 3.38 m/s is not an acceptable velocity, you may want to specify the velocity constraint, so that the available fireflow results show the flow available while not exceeding the velocity constraint (or pressure constraints). This will allow you to see the change in available fireflow as you try upsizing those 227 mm pipes.
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Please submit the model for review along with steps to reproduce:
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