Yes, and by 'different fire curves' I assume you mean fire growth rates. I want to model the four common 'design fires': SLOW, MEDIUM, FAST, and ULTRAFAST. All four will be "T-Squared", which as you know means the growth is proportional to the time squared. I am not sure what the proper word is for the factor that distinguishes SLOW from FAST but I know what the numbers are and how to calc how many seconds from ignition to peak RHR (Rate of Heat Release). I want to find out what this "...same RHR point..." is. I will have to run (8) scenarios because I want to use two separate max RHR. I will use 1250 kW and 2500 kW. The factor I use for FAST, for example, is .0466 kW/sec2. So a 2500 kW T-Squared FAST fire would peak at (2500/.0466)^.5=~232 seconds. I suppose I could then compare the activation time to the time for max RHR and get a percent before or after for the different growth rates and max RHRs. thanks, Brad
-----Original Message----- From: Roland Huggins [mailto:[email protected]] Sent: Thursday, October 03, 2013 10:57 AM To: [email protected] Subject: Re: Spacing Rules I was simply trying to make the reference to time more than just how many seconds have passed and tie it to the level of hazard presented by the fire by using the same point on the different fire curves. Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org On Oct 3, 2013, at 5:54 AM, Brad Casterline <[email protected]> wrote: > Dang Roland this opens up a whole new can of curiosity for me. > Figuring out exactly what you mean will give me something to do the next > couple-three lunch breaks. I usually check out the FDS-SMV discussions but > for some dumba$$ reason the NIST site has been down since Tuesday (smh). > > Brad > **************** > ..... A more meaningful reference for activation is in regard to the same > RHR point for the different fire curves...... > > ...... > Roland > > Roland Huggins, PE - VP Engineering > American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives > Dallas, TX > http://www.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
