....and the garage is wet from cars dripping. Even more moisture into the compressor. At what point does air drying become cheaper than staff time used running around to drains?
Bruce Verhei ----- Original Message ----- From: "Ron Greenman" <[email protected]> To: [email protected] Sent: Friday, January 8, 2010 4:34:47 PM GMT -08:00 US/Canada Pacific Subject: Re: Excessive Condensate Warm wet air being compressed to hot wet air in the valve room and then being pushed into cold pipes. What you describe is a regular thing here in the Pathetic Northwet. On Fri, Jan 8, 2010 at 3:09 PM, Mark Sornsin <[email protected]> wrote: > I suspect your second example is what's happening - the system piping is only > 5 yrs old and they claim the compressors don't run much (never ran for the > 1/2 hour I was there - for whatever that's worth). Except, they 'reportedly' > drained the drum 8 or 10 times over a few months and still get this much > water. Seems remarkable. > > Mark > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Chris Cahill > Sent: Friday, January 08, 2010 4:24 PM > To: [email protected] > Subject: RE: Excessive Condensate > > Yep and many times it's due to a leaky system where the compressor runs a > lot. Put a 40 psi test on the system to see how tight it is. That will > confirm whether this is new water or from the past trip. > > I've also see a cycle where the DD wasn't drained in fall and they have a > freeze up in a DD. Then a couple week later another. What's happening > there is the first trip adds water and some of it freezes to the inside of > the pipe. Then a few weeks later with weather changes it melts and collects > in the DD only to freeze during the next cold snap and so the cycle starts > again. > > Chris Cahill, P.E. > Fire Protection Engineer > Sentry Fire Protection, Inc. > > 763-658-4483 > 763-658-4921 fax > > Email: [email protected] > > Mail: P.O. Box 69 > Waverly, MN 55390 > > Location: 4439 Hwy 12 SW > Waverly, MN 55390 > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Mark Sornsin > Sent: Friday, January 08, 2010 3:59 PM > To: '[email protected]' > Subject: Excessive Condensate > > I have a client with a parking garage. Large enough for two dry-pipe > systems. Each are piped relatively flat (pitched per NFPA 13, but no more); > each on a big loop of 4 in main with side feed branch lines out the side of > the mains. > > This system was last flooded last summer (say August). Since that trip test > and subsequent draining, the client has blown out all 6 low point drum > drips twice a month, every month. But even still, over Christmas, and only > two weeks after blowing out the drum drips, they froze 4 of the 6 drum drips > to the point of breakage - 3 of the 6 were filled with ice throughout the 2 > in. x 12 in. drum, and up the 5 or 6 ft. of 1 inch pipe. > > The contractor that replaced the drum drips noted that there was no > appreciable water on top of the dry valves, so the water in the pipes > appears to be entirely from condensate. Or maybe, somehow, residual from > the trip testing 5 months ago (???). > > Has anyone of you seen this amount of condensate coming from a dry system? > The air compressors are floor mounted with no tank. The riser room is > somewhat damp (large sump pit located here, too) and maintained at about 55 > degrees. But I still have a hard time imagining how that much water could > come from condensate. > > Any thoughts? > > > Mark A. Sornsin, PE > Fire Protection Engineer > Ulteig Engineers, Inc. > Fargo, ND > Direct: 701. 280.8591 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- Ron Greenman Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA, WSAFM _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
