Micropack Release New Application Note on Visual Flame Detection in Aircraft Hangars
Micropack has extensive experience with the detection of fires in Aircraft Hangars through the supply of detection systems to hangars across the globe.
This application is a challenging place for flame detectors to operate correctly. Fundamentals In a typical Aircraft Hangar there are four fundamental functions that the optical flame detection system should deliver:- Provide full coverage of the aircraft hangar. The building is a large open space that houses moving machinery and large aircraft. The flame detector must also contend with viewing the hangar and runway. Restrictors to the field of view of detectors are generally not recommended. The optical flame detection system must be mapped accordingly by certified Fire and Gas Practitioners / Fire Protection Engineers using an approved 3D Flame Detection Mapping Package - HazMap3D. Demonstrate a high false alarm immunity to radiant sources other than flames. For example EMI/RFI sources, Hot CO2 emissions and welding. Provide a fast response to flaming fires to ensure the fire protection system can be activated in time to extinguish the fire and protect the expensive aircraft.
Aircraft Hangar Fires As has been seen by costly and devastating fires in aircraft hangars reported around the globe, the need to have a properly mapped flame detection system by a certified Fire and Gas Practitioner (FGP) and adequately designed fire extinguishing system is critical. Historically, jet fuels used were extremely volatile and when ignited would propagate rapidly. Safety measures have been introduced and current jet fuels are more difficult to ignite, providing a layer of safety. Fires most commonly occur during times of refuelling, ongoing maintenance activities and spray painting. In addition to these scenarios, Micropack also has experience of supplying detection systems to protect the windows of the passenger terminals in case of a fuel spill whilst fuelling the aircraft. This is not typically common, however, the use of water curtains in the event of a fire cools the windows to prevent the heat from shattering the glass and injuring passengers. The flame detectors are typically angled at jet ways to trigger the water deluge system. The use of optical flame detection is not only limited to aircraft hangars. Areas such as the refuelling area for rental cars at airports is a common application for flame detection to be applied. In this application, moving vehicles, reflective surfaces and hot exhaust emissions all could have a negative effect on certain models of flame detector.
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