What's the true time duration of this sim? Jack Fairchild
-----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Tuesday, July 15, 2014 10:13 AM To: [email protected] Subject: RE: ECOH 20x20 OH1 Obstructed Construction Max would be 22" (16" deep beam + 6"). Minimum would be 13" because If I looked at 13 right at 3'9 from the beam the deflector can be max 3" above the bottom. .2m cell is how 'fine' the calculation domain is, .1*3.28=4", so I can only 'resolve' to an accuracy of 4" increments. I first set this up using .05m cells so I could look at activation time for 286F Standard Response at 22", but that calc was taking several days to complete and I lost patience. Just because we CAN be 22" down in this situation, doesn't mean we should :). I think it is always best to be as high as possible without the flow being obstructed because not only is the activation faster, the pattern hits higher up, like on a couch against a wall! Brad -----Original Message----- From: Matthew Willis [mailto:[email protected]] Sent: Tuesday, July 15, 2014 8:57 AM To: [email protected] Subject: Re: ECOH 20x20 OH1 Obstructed Construction *Published on Jul 15, 2014* 20x20x10 room. ECOH sprinkler centered. 16" steel I beams 3'-9" from center. Max deflector is 22", and Min is 3" above bottom of beams= 13" , but deflector distance is closer to 12" due to .2m cell size. OH1 figured here, 400 x.15=60 GPM, K=11.2. Activation time difference between min and max deflector distance is not part of this movie- instead, the sim is to show suppression time for the flow rate if the head activated when the heat release rate is 2750 kW. Wall Temperature and Water Drop Temperature are displayed. I used E_COEFFICIENT=2. Correction-- .1m cells, so deflector distance can be 12", 16", 20", or 24". Walls and ceiling are gyp. bd., floor is carpet. Doors are 3x7. K=11.2? I might be looking incorrectly, but in your heading you state obstructed construction. This allows 17" - 22" from deck. Your second comments state between cells and you list 12, 16, 20, and 24. Doesn't cell spacing not limit us to 1-12" R/ Matt On Tue, Jul 15, 2014 at 9:11 AM, Brad Casterline <[email protected]> wrote: > https://www.youtube.com/watch?v=B-Gj7V3hCyM&feature=youtu.be > > > > Movie anyone? > > > > Brad Casterline, NICET IV > > Fire Protection Division > > > > FSC, Inc. > > P: 913-722-3473 > > [email protected] > > www.fsc-inc.com > > > > Engineering Solutions for the Built Environment > > > > _______________________________________________ > 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
