I would think you can determine the required flow and duration required. If it is less than the 500,000 gallons, maybe you could extrapolate and arrive at the “bottom” of the required supply, which may be above the actual tank bottom.
Ken Haney Certified Engineering Tech Haney Fire Protection, Inc. [email protected] From: Radhakrishnan Duraikkannu via Sprinklerforum Sent: Tuesday, May 11, 2021 1:26 AM To: [email protected] Cc: Radhakrishnan Duraikkannu Subject: Re: Available Pressure from Fire Water Storage Tank hi can you share the pump capacity and discharge head along with the new building sprinkler requirement additional pressure required, On Fri, May 7, 2021 at 11:43 PM Kyle.Montgomery via Sprinklerforum < [email protected]> wrote: > I'm working on a project where they are adding a new building to an > existing campus. There is an existing fire water storage tank and fire > pump that serves the site underground fire loop. The new building has a > very demanding sprinkler system that just barely exceeds the fire pump's > pressure available at the demand flow (using just the pump curve as the > water supply). > > Normally, I would be conservative and use just a few psi as my water > supply from the tank (as though it were nearly empty). But, is that overly > conservative? The tank is mounted on the ground, at the same elevation as > the fire pump, but it is nearly 45 feet tall, with a total capacity of over > 500,000 gallons. Can I use some of that elevation pressure, or do I need to > design and calc as though the tank is nearly depleted? > > -Kyle M > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
