17 September 2007 Investigation of thermal management technique in blue LED airport taxiway fixtures
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Abstract
On airport runways, blue light fixtures denote taxiways between the runway and the airport terminal. Blue optics transmit mostly short-wavelength radiation, which makes traditional incandescent lamps a poor choice of light source; the resulting fixture efficiency could be less than one percent. LEDs are replacing incandescent lamps in this application. But unlike incandescent sources, LEDs do not radiate enough heat to melt ice and snow from the fixture optics. To meet Federal Aviation Administration (FAA) regulations for weatherability, some LED-based fixtures incorporate electric heaters that, when switched on, nearly negate the energy-savings benefit of converting to LED sources. In this study, we explored methods for conduction and convection of LED junction heat to taxiway fixture optics for the purpose of minimizing snow and ice buildup. A more efficient LED-based system compared to incandescent that would require no additional heaters was demonstrated.
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Yimin Gu, Yimin Gu, Alex Baker, Alex Baker, Nadarajah Narendran, Nadarajah Narendran, } "Investigation of thermal management technique in blue LED airport taxiway fixtures", Proc. SPIE 6669, Seventh International Conference on Solid State Lighting, 66690U (17 September 2007); doi: 10.1117/12.741434; https://doi.org/10.1117/12.741434
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