OPTIMAL PLATE-FIN DESIGN FOR IMPROVING HEAT DISSIPATION PERFORMANCE OF AUTOMOBILE LAMP REFLECTORS

Automobile headlamp reflectors are subjected to high temperatures owing to heat produced by the lamp and their sealed structure. Such high temperatures reduce light quantity and shorten service life in lamps. Therefore, this study designed and analyzed radiating fin designs, integrated into these reflectors, aiming to improve headlamp heat dissipation performance. Basic analyses were conducted upon an existing headlamp, and the validity of the analytical model was verified by testing existing reflector temperatures under conditions similar to those modeled during the analyses. Based on this verification, three types of radiating fins were modeled and analyzed. The vertical fin type exhibited the highest heat dissipation performance. Subsequently, design variables were selected for the vertical fin type and size optimization was performed using the design of the experiment model. Results confirmed a heat dissipation performance increase of 4.5% relative to the existing model.