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신윤혁(Yoonhyuk Shin),심승규(Seungkyu Sim),송종욱(Jongwook Song),김철민(Chulmin Kim),임동현(Donghyun Lim),김성철(Sung Chul Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
In this study controller integrated heater modules using high voltage power were made for electric vehicles. The heat core and controller for the heater module were designed to improve the heater power density. We also investigated the performance characteristic(heating capacity, energy efficiency, pressure drop) of heater modules through the experiments. Therefore, the experimental results indicated that prototype of heater module had satisfactory performance. This study will contribute to developing the heating system for electric vehicle.
기하학적 형상 및 경계조건의 변화에 대한 공진 기반 생화학 센서의 감도 특성 분석
신윤혁(Yoonhyuk Shin),임시형(Si-Hyung Lim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
For the micromechanical structure having the bio-chemical molecular adsorption like alkanethiol self assembly monolayer formation, the origin of resonance shifts has been analyzed for different physical dimensions, materials, and boundary conditions using numerical analysis. When the bio-chemical substances are adsorbed on the one side of the micromechanical structure, both material layer addition and adsorption induced surface stress change occur simultaneously. For the microcantilever structure having the fixed-free boundary condition, the effect of the surface stress change on the resonance shift was negligible. However, that of the material layer addition was more dominant. On the other hand, in the microbridge structure having the fixed-fixed boundary condition, the effect of the surface stress change was more dominant compared to that of the material layer addition. Furthermore, it was found that the microbridge structure has one or two order higher sensitivity than the microcantilever structure for the same bio-chemical adsorption stimulus. The analysis results can provide some insights and good basis for the high sensitive resonance based bio-chemical sensor design.
마일드 하이브리드 차량용 전기히터 전원부 방열해석에 관한 연구
신윤혁(Yoonhyuk Shin),임동현(Donghyun Lim),이호성(Hoseong Lee),심승규(Seungkyu Sim) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
In this study, the heat dissipation analysis and design of power control unit for 48 V electric heater used in mild hybrid vehicles was performed. The heat sink of power control unit in electric heater was designed for enhancing reliability of the power device(MOSFET) under high temperature conditions. The temperature distribution and maximum temperature of power control unit in operating condition were analyzed with CFD(Computational fluid dynamic) method by each model. This study will contribute to designing the heat dissipation of power control unit for electric heater.