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http://dx.doi.org/10.5855/ENERGY.2019.28.4.035

Thermal Flow Analysis for Development of LED Fog Lamp for Vehicle  

Lee, Suk Young (Department of Mechanical Engineering, Inha Technical College)
Publication Information
Journal of Energy Engineering / v.28, no.4, 2019 , pp. 35-41 More about this Journal
Abstract
In order to overcome these disadvantages, the halogen light source, which was previously used as a vehicle fog light, has increased power consumption and a short lifetime, and thus, an automobile light source is gradually being replaced with an LED. However, when the vehicle LED fog light is turned on, there is a disadvantage in reducing the life of the fog lamp due to the high heat generated from the LED. The heat generated by the LED inside the fog lamp is mainly emitted by the heatsink, but most of the remaining heat is released to the outside through convection. When cooling efficiency decreases due to convection, thermal energy generates heat to lenses, reflectors, and bezels, which are the main parts of lamps, or generates high temperatures in LED, thereby shortening the life of LED fog lights. In this study, we tried to improve the heat dissipation performance by convection in addition to the heat dissipation method by heat sink, and to determine the installation location of vents that can discharge the internal air or intake the external air of LED fog lamp for vehicle. Thermal fluid analysis was performed to ensure that the optimal data were reflected in the design. The average velocity of air increased in the order of Case3 and Case2 compared to Case1, which is the existing prototype, and the increase rate of Case3 was relatively higher than that of other cases. This is because the vents installed above and below the fog lamps induce the convective phenomena generated according to the temperature difference, and the heat is efficiently discharged with the increase of the air speed.
Keywords
Light emitting diode(LED); fog lamp; thermal fluid analysis; convection;
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  • Reference
1 Kim, C. S. et al., 2008, Lifetime Estimation of an Automotive Halogen Lamp, Journal of Mechanical Science and Technology, Autumn Scientific Congress, pp. 1259-1264
2 Shin, J. H., et al., 2011, A Study on design direction of automotive lamp through diver cases applied LED technology, Journal of Korean society of design science 24, pp. 47-57
3 Kang, B. D., et al., 2009, Evaluation of fuel consumption between LED headlamp and halogen headlamp, KSAE09-A0294 pp. 1709-1714
4 Jung, E. D., et al., Development of a heat dissipating LED headlamp with silicone lens to replace halogen bulbs in used cars, Applied Thermal engineering, volume 86, pp. 143-150   DOI
5 Lee, J. W., et al., 2014, A Study to Compared on Maintenance and Electricity Energy Saving, to be Replaced by Halogen Lighting Fixtures and LED Lighting Fixture, in Workship Concert, Journal of Communications and Networks, pp. 63-64
6 Sim, W. S., et al., 2016, Study on the development of lens-attached LED fog lamps for replacing halogen fog lamps, The Conference of Korean Society of Mechanical Engineers, pp. 280-282
7 Chang, Y. K., et al., 2010, A Study of Thermal Factor of Automotive Lamps using CFD, The Conference of Korean Society of Automotive Engineers, pp. 877-883
8 Jang, J. Y., et al., 2016, Thermal Analysis for the Development of the Railway Vehicle LED Headlamp Heat Sink, The Conference of Korean Society For Railway, pp. 944-947