I don't know what the design basis was, but it looks like we need the automatic fill to maintain the head pressure, so probably not.
On Fri, Jun 13, 2014 at 8:20 AM, Brad Casterline <[email protected]> wrote: > Karen, > Sorry about the superfluous talk about fire- I was watching it all play out > in my mind (fast forwarded because 2 hours is a long time)- but this is > interesting in that the fill rate is equal to the discharge rate, so it is > no different than a city water flow test, except you need a fire pump for > pressure. > Was the water storage tank capacity arrived at based on system demand for 2 > hours, with no consideration of automatic fill? > Brad > -----Original Message----- > From: Brad Casterline [mailto:[email protected]] > Sent: Thursday, June 12, 2014 9:14 PM > To: [email protected] > Subject: Re: 2 hour fire water supply > I see accidental fires, Sprinklered or not, going through three phases: > erratic growth, somewhat steady burning, then some sort of decay. If you > look at what might be the lowest water level in the tank over two hours > would be you could get an idea of what the minimum pressures at the > sprinklers would be. >> On Jun 12, 2014, at 9:01 PM, Brad Casterline <[email protected]> > wrote: >> >> Probably not since there is a difference between the total capacity and > the available head at any one instant in time? >> >>> On Jun 12, 2014, at 8:40 PM, Karen Lesko <[email protected]> wrote: >>> >>> When evaluating fire water supply to ensure there is a 2 hour supply, do > I >>> have to take the head pressure loss of the fire water tank level drop > into >>> account over the 2 hours? The tank has makeup from wells that have > normal >>> and back-up power, and the well makeup into the fire water tank equals > the >>> output of the fire pump. >>> >>> Thank you in advance, >>> >>> Karen Lesko >>> _______________________________________________ >>> 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 > _______________________________________________ > 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
