Fire Suppresion System, Bottle Pressure for certain discharge rate...help
Fire Suppresion System, Bottle Pressure for certain discharge rate...help
(OP)
I've been assigned the task of designing a fire suppression system. The biggest problem I have is knowing what my bottle pressure should be when I have multiple lines branching off from the main line. There will be a nozzle at the end of each line that has a maximum specified flow rate. I have been told that the contents should be discharged totally over a 15 - 20 sec time span. Is there software out there that is available in the public domain that will enable me to calculate this?





RE: Fire Suppresion System, Bottle Pressure for certain discharge rate...help
Size of tank, flow rate of nozzles, pressure and pressure source are just some.
Also define discharged. 100% of content or 100% of pressure. All nozzles open or just some.
Essentially you want a system where the flow rate out of your tank meets the time requirement and the nozzles should be capable of the same rate. Provided that the line resistance is low enough you should be able to size the system.
RE: Fire Suppresion System, Bottle Pressure for certain discharge rate...help
But for information this document: http://www.uscg.mil/hq/cg5/nvic/pdf/1970s/n6-72.pd... has a very similar calculation to the one I had seen in the file.