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I was wondering what systems others have found that will work for smoke detection in a challenging environment (e.g. large high bay environment with a test stand/dynamometer)?
We currently have an OSID dual-beam detector system but it has had many unwanted alarms that despite troubleshooting with the manufacturer, we cannot determine the cause. I know more detail might be needed but just seeing what systems others have found that will work. A conventional beam detector will not work in this environment. A forklift and crane can be operated in the space with a large overhead door open. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
9 Comments
In large spaces such as what you are describing, smoke sampling systems work well. There is the capacity to create zones and to individually sample high value equipment, electrical closets, etc.
Willie Nel
11/15/2021 08:27:40 am
Your information is very sketchy. I will endeavor possible solutions. Is the sensitivity of the beam detector system not set too fine? - Has the installer set the beam detector to detect greater concentrations of smoke? Maybe installing the detector at a higher elevation with improved ventilation when the bay is in operation/ occupied?
Pete H
11/15/2021 08:32:24 am
Typically beam detectors are the go-to for high ceiling environments. If they cannot work in this application for an indeterminable cause... perhaps this one is a challenging enough installation to warrant video image detection?
Regarding your mention of unwanted "alarms". Are you saying the OSID is receiving a fire alarm or is the system experiencing trouble or supervisory conditions.
Daniel
11/15/2021 12:40:08 pm
The OSID is receiving an alarm. Troubleshooting verified that the system did not activate during the crane. We have admin controls to disable the beam detectors when forklift or crane operations commence but they aren't always followed. However, as mentioned troubleshooting seemed to rule out the crane obstruction. Also, the system had no trouble contacts landed initially but we've since connected them and tested that capability. However, during unattended testing we had another alarm that no one can identify a cause of. We've tried to work with the manufacturer but they defer to the installing contractor/distributer. Phonecalls with the manufacturer have not worked to help identify a cause. We also don't have access to the program currently to check for programming errors.
Brian Gerdwagen FPE
11/15/2021 09:04:56 am
I have had OSID's go into Trouble because the LED lighting was too close and caused a flicker on the receiver's imager.
Alex
11/15/2021 09:16:16 am
I would say smoke sampling or a redefined beam detection.. I would have the manufacture of the beam detector come out to verify the system
Jerry Clark
11/15/2021 09:25:48 am
VESDA systems are rapidly becoming the industry standard for protection in areas where conventional smoke detection just is not feasible. As an example, we recently completed installation of an Xtralis VESDA in one of our 1940's era dirigible hangar where the roof elevation is around 171 feet. We have numerous other VESDA systems in smaller, less challenging locations. But since this was the first proposed for installation in this large of an environment, we had the designers perform modeling with several different fire-scenarios. Once approved and installed, we then tested with a live-fire using heptane. The system performed BETTER than the modeling predicted.
M E Wilson
11/22/2021 07:51:11 am
I know you specified smoke detection but this seems like an environment where smoke is a normal occurance (dynamometer, fork lifts). This might be an application for spot heat detectors or linear heat detection wire. Leave a Reply. |
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