buongiorno, dopo tante domande siamo quasi arrivati alla fine del problema.
Dopo aver calcolato un'analisi transitoria di arresto di una pompa con numero di giri variabile ho problemi relativi alla cavitazione e quindi ho inserito dove ho questi problemi…
buonasera, ho riscontrato due errori in questa simulazione:
1) problema cavitazione
2) analizzando i risultati dell'analisi ho notato che le portate (flow) delle tubazioni a valle della pompa spenta non tendono mai a 0
ho pensato:
per risolvere…
Cesar,
You can still have reverse flow through a pump even if the impeller is not spinning (reverse spin disallowed in the transient tab of the pump definition.) So, it is different from the check valve option, which would actually close the pump…
I'm trying to evaluate the need for surge protection at new well locations in a raw water transmission system. I have a network of 6 wells all pumping to the water treatment plant. I'm new to Water Hammer and surge analysis so I'm just looking for some…
Hello,
The pumps are going to operate based on the system conditions (where the pump curve intersects the system head curve.) So, you'll need to "model what you've got" to get the right pump operating point. Meaning, if there aren't FCVs in reality…
Velibor,
You need to enter the pump inertia. This is needed for a shutdown event, so HAMMER can correctly compute how the pump spins down. It is not needed with a constant speed pump because the pump isn't changing speed.
Regards,
…