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승용LED방열판 냉각특성

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Author(s)
유재용
Issued Date
2016
Keyword
전조등 방열판 냉각특성 연구
Abstract
ABSTRACT
Cooling Characteristics of a Heat Sink for LED Headlight
used in Passenger Cars

Yu, Jae Yong
Advisor : Prof. Yang, Seemoon
Department of Automotive Engineering
GraduateSchoolofIndustrial Technology


Heat sinks are the commonly used devices for enhancing heat transfer in electronic components. An optimal of design of heat sinks is influenced by various geometrical parameters such as fin length, fin thickness, number of fins, base plate thickness, space between fins, fin shape etc. Also, the design of an optimal heat sink requires a complete knowledge of all heat transfer characteristics between the heat source and the ambient air and thus it is essential to fully understand the effects of given boundary conditions such as applied heat fluxes and approach air velocities on cooling characteristics of the heat sink. The objective of this thesis is to investigate the cooling characteristics of a heat sink for LED headlight used in passenger cars. To this end, this thesis deals with the experimental and numerical analysis of the heat sink heated at constant heat fluxes with/without air flow applied.
In the experiments, heat was transferred at a constant heat flux (ranging from 9974 W/m2 to 16860 W/m2) through the bottom of a heat sink for natural convection mode. For forced convection mode, the bottom of the heat sink was heated at fixed heat flux of 16860 W/m2 while air flow velocity ranging from 2m/s to 6m/s was applied around the heat sink. Measured temperature on pre-selected locations of the heat sink was in good agrement with numerically predicted one. Experimental and numerical results indicate that the convective heat transfer coefficient for natural convection mode was decreased with increasing the heat flux applied to the bottom of heat sink, lowering the cooling capabilities. On the other hand, the convective heat transfer coefficient was found to significantly increase with air flow velocities, enhancing the cooling capabilities.
Alternative Title
Cooling Characteristics of a Heat Sink for LED Headlight used in Passenger Cars
Alternative Author(s)
Yu Jae Yong
Affiliation
조선대학교 융합대학원 자동차공학과
Department
산업기술융합대학원 융합자동차공학과
Advisor
양세문
Awarded Date
2016. 2
Table Of Contents
목 차

LIST OF TABLESⅠ
LIST OF FIGURESⅡ
NOMENCLATUREⅣ
ABSTRACTⅤ

1. 서론1
1. 연구 목적1

2. 실험 및 수치 해석방법5
2.1 실험장치 및 방법
(1) 실험장치의 구성5
(2) 실험방법9
2.2 수치해석 방법 및 조건
(1) 수치해석 방법 및 지배방정식12
(2) 히트싱크 모델링 및 수치해석 조건14

Ⅲ. 실험/수치해석 결과 및 고찰18
1. 자연대류에 의한 히트싱크의 냉각 특성18
2. 강제대류에 의한 히트싱크의 냉각 특성27

Ⅳ. 결론33

【참고문헌】34
Degree
Master
Publisher
조선대학교 융합대학원
Citation
유재용. (2016). 승용LED방열판 냉각특성
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/1940
http://chosun.dcollection.net/common/orgView/200000265387
Appears in Collections:
Engineering > Theses(Master)(산업기술창업대학원)
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