http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 기재형(Ki Jae-Hyung) (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
전력반도체 냉각을 위한 원통형 루프히트파이프 제작 및 성능 평가에 관한 연구
기재형(Ki Jae-Hyung),유성열(Ryoo Seong-Ryoul),성병호(Sung Byung-Ho),김성대(Kim Sung-Dae),최지훈(Choi Jee-hoon),김철주(Kim Chul-Ju) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The Loop Heat Pipe (LHP) operates to pump the working fluid by means of the capillary force in a wick structure. Particularly, it is difficult to design and manufacture the evaporator consisted of a grooved container and a compensation chamber as well as the wick structure. This study is related to design and manufacture the grooved container coupled with wick structure, the properties of the wick structure such as the permeability, the porosity, and the maximum capillary pressure were measured to apply the cooling technology for Insulated Gate Bipolar Transistor (IGBT). The container of the LHP was manufactured by the electrical discharge process and the wick structure was sintered with the nickel particle by an axial-press apparatus with the pulse electronic discharge. As results, the properties of the wick were experimentally obtained about 60% of the porosity, 35kPa of the maximum capillary force and 1.53 × 10-13㎡ of the permeability.
-
동력분산형 고속전철의 추진시스템용 냉각장치 설계 및 시제품 제작 연구
유성열(Ryoo Seong-Ryoul),김성대(Kim Sung-Dae),기재형(Ki Jae-Hyung),임광빈(Yim Kwang-Bin),김철주(Kim Chul-Ju) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The objective of the present study is to develope a propultion unit cooling system for the next-generation High-speed EMU. The propulsion power control unit consists of some IGBT semiconductors. In general, those power semiconductors are very sensitive to temperatures and need a cooling system to keep them at a proper operational conditions in the range of 50~100℃. In this first year of study, we tried to focuss on the understanding of fundamental technologies for each of the two different cooling systems and collecting basic data for design and manufacturing for both cases. For the water cooling system, a heat sink with multi channels of liquid flow was considered and a model unit was designed and performance test was conducted. For the heat pipe cooling system, a Loop Heat Pipe(LHP) was considered as an element to transport heat from IGBT to environment air flow and a model unit was designed and performance test was conducted. The analysis using SINDA/FLUINT showed that those design parameters are good enough for the LHP to properly operate under a heat load up to around 360W.
-
동력분산형 고속전철의 추진시스템용 냉각장치의 설계 연구
유성열(Ryoo Seong-Ryoul),김성대(Kim Sung-Dae),기재형(Ki Jae-Hyung),임광빈(Yim Kwang-Bin),김철주(Kim Chul-Ju) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Present, the cooling method of using a phase-change heat transfer such as immersed type, heat pipe etc is applied in cooling of high-capacity power semiconductors of the main power system for the high speed train with the concentrated traction. In order to apply these phase-change cooling system to the high speed EMU to be developed, needed are technological researches of consideration of installing space, air passage, light weight material and miniaturization. Although this research establishes design specifications through theoretical analysis and computational analysis from the basic design process of the cooling system of the propulsion system for the high-speed EMU, when details design is completed, present improvement subject and optimum design before manufacturing the prototype of the cooling system on the basis of analysis results. And then, carried out will be the performance tests through prototype manufacture and reliability estimation by components of cooling system.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
