I'd agree, FWIW.
George L. Church, Jr., CET Rowe Sprinkler Systems, Inc. PO Box 407, Middleburg, PA 17842 877-324-ROWE 570-837-6335 fax g...@rowesprinkler.com -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Sprinkler Forum Sent: Friday, August 24, 2012 7:36 AM To: sprinklerforum@firesprinkler.org Subject: Re: Ventilation for diesel driven fire pump room Aha perfect time to jump in... I have been going through these calcs on Clarke's website all yesterday. I have a situation where we are looking at 125 degree ambient temperature (outside) and about 120 degree water that will be used for the heat exchanger. Using a delta t of 10 degrees F for the pump room I am getting about 20,000 cfm needed for ventilation of the engine I have selected. So I have derated the engine based on 130 degrees temp in the pump room ( I know the code says 120 is max but what can we do that's what we're starting at outside). We may also have to go with a larger cooling loop also given the water temperature. So here's the question. I have selected a diesel engine because we do not have a reliable power supply, so... What about the ventilation fans? If the power goes out because of this unreliable power supply, I wont have the ventilation fans. Just wondering if anyone has dealt with looking at the reliability of the ventilation fans before. I looked at FM data sheets and did not see it addressed as well as NFPA 20. My current solution will be to provide a small genset for the just the fans and the motorized dampers that are part of the ventilation system. This is preferrable (I think) to going with electric pumps with a larger generator. Justin Reid Sent from my iPhone On Aug 24, 2012, at 3:55 AM, å... .... <eurekaig...@gmail.com> wrote: > NFPA 20; consider not just combustion air, but cooling air for the > convective/radiative heat leaving the engine, cooling air needed by > radiator, flow path restrictions, etc. Also consider highest expected > maximum ambient temperature (with its derating) and consider altitude > (and its derating). > > Scot Deal > excelsior fire > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: > <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/atta > chments/20120824/c95d0dc8/attachment.html> > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.org > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
