fireflow

I am trying to run a automated fire flow scenario, however I would like the flex table to stop calculating or display once 3500 gpm is reached or 20 psi residual. I have set up the following (see image) but my flex tables will not calculate up to 3500 gpm when the residual is not 20 psi?

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  • Hi, the fireflow could still stop before 3500 gpm or 20 psi residual if the zone pressure constraint (which you have set to 0 psi) is violated or if the network becomes unbalanced.

    If you're not already on the latest version (10.04.00.108) I recommend upgrading since we've made several improvements to fireflow reporting over the past few most recent versions (which you can read about here). If you're on the latest version, you can see the "reason" for why the fireflow stopped, which should give you insight into whether it was the zone pressure constraint or unbalanced network that is stopping your fireflows short.

    If the problem is the zone pressure constraint, it could be due to a junction at a high point or pump suction side experiencing negative pressures, which you could place in another zone or exclude. See: Fire flow nodes are failing because of low pressures on the suction side of a pump


    Regards,

    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.

Reply
  • Hi, the fireflow could still stop before 3500 gpm or 20 psi residual if the zone pressure constraint (which you have set to 0 psi) is violated or if the network becomes unbalanced.

    If you're not already on the latest version (10.04.00.108) I recommend upgrading since we've made several improvements to fireflow reporting over the past few most recent versions (which you can read about here). If you're on the latest version, you can see the "reason" for why the fireflow stopped, which should give you insight into whether it was the zone pressure constraint or unbalanced network that is stopping your fireflows short.

    If the problem is the zone pressure constraint, it could be due to a junction at a high point or pump suction side experiencing negative pressures, which you could place in another zone or exclude. See: Fire flow nodes are failing because of low pressures on the suction side of a pump


    Regards,

    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.

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