인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
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지원사업
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커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록·키워드
LED lighting technology has been attracting attention as a next-generation high-efficiency light source in various kinds of lighting such as railway vehicle, automobiles, and indoor and outdoor lighting, which are continuously developing. Railway vehicle headlights are sealed beam and HID, and recently LED headlights are widely used. However, only 20% of LED power is emitted by light, and more than 80% is converted into thermal energy. As a result, it is known that when the temperature rises, the life of the LED drastically decreases. As such, the LED has a fundamental problem of heat dissipation at higher output, and natural convection, forced convection, heat pipe, and liquid cooling technology are being used. Therefore, in this study, we tried to derive the heat dissipation performance and the optimal heat dissipation structure through simulation of the heat dissipation system and the thermal analysis simulation according to the ambient temperature change, which is necessary for the development of the high brightness LED headlight for railway vehicles with a capacity of 300,000 Cd or more. As a result, the temperature distribution of the COB LED and the heat sink can be confirmed that the initial ambient temperature can affect the temperature distribution. Also, it was confirmed that the difference in the temperature distribution due to the COB LED and the heat sink and the initial ambient temperature change is smaller than that of the front ventilation method. Finally, to protect the LED headlight"s COB LED and heat sink, it is considered necessary to cool the forced ventilation system rather than the cooling of the natural ventilation system.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
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최근 본 자료 전체보기
UCI(KEPA) : I410-ECN-0101-2017-525-002244896
