소결금속 비등 전열면을 이용한 베이퍼챔버형 히트파이프의 LED 조명등 방열 성능에 관한 연구

Abstract

To solve the problem with fluorescent lamps and incandescent lamps which has been the conventional illumination system will greatly enhanced energy efficiency and lifetime of the LED(Light Emitting Diode) lighting device. Recently, LED lighting system has attracted the attention of the industries and its lighting technology is different from incandescent lamp because it has no filaments which make it more robust and strong to resist vibrations effect. LED lighting system shows less energy consumption, electric spark does not occur and this will greatly improves the performance and stability of indoor lighting system. However, 80% of the electrical energy used in LED is converted into heat through effective heat dissipation of LED temperature modules and lowering the substrate temperature to improve the reliability, lifetime and heat problem should be minimized. Optimal heat dissipation design and equipment manufacturing LED lifetime and the performance can be improved. Relying on natural convection heat dissipation of the LED is fast becoming a better lighting practice but LED heat generation and dissipation remain a great concern. In order to solve these problems, we use VCTHP(Vapor Chamber Type Heat Pipe). Which has a heat spread role and heat transfer rate 2000 times higher than copper within a short time and large amount of heat can be transported. Optimal quantity state of horizontal fin vapor chamber is R-141b 35%, and the heat transfer surfaces are sintered. At this time, the LED chip temperature was 91.0℃, the thermal resistance 10.84 ℃/W. In transformed vertical fin VCTHP was best thermal performance at R-141b 45%. In this regard, the lowest temperature of LED chip was 77.3℃ and thermal resistance was 8.32 ℃/W. Performance of VCTHP for heat dissipation in LED illumination cooling system was excellent in all conditions in this study.