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Browsing by Subject "Mechanical Engineering"

Browsing by Subject "Mechanical Engineering"

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  • 0.1 ㎛ Ni두께를 가지는 얇은 ENEPIG 층과 Sn-3.0Ag-0.5Cu 솔더와의 계면반응 및 접합강도 
    Jong-Hoon Back; Sehoon Yoo; Deok-Gon Han; Jung Seung Boo; Jeongwon Yoon (The Korean Welding and Joining Society, 2017-12)
    A new multilayer metallization, ENEPIG (electroless nickel electroless palladium immersion gold) with 0.1㎛ thin Ni(P) layer (thin-ENEPIG), was plated on a Cu PCB substrate for fine-pitch package applications. We evaluated ...
  • 0.5 gpm미만 원자로 냉각재 계통 누설감지 센서 시스템 개발 
    TAESOON Kwon; Jongrok Kim; 최춘기; Park Junesic; 최청열 (Korean Society for Fluid Machinery, 2021-04)
    If the size of the crack in the pressure boundary of the pressurized light water reactor coolant system is very small, the coolant is vaporized and spreads into the containment vessel at the beginning of the leakage, and ...
  • 0.5 MWth 가압 케미컬루핑 연소기 개념설계 및 구현 가능성 조사 
    Ho-Jung Ryu; Lee Dongho; 장명수; 김정환; 백점인 (The Korean Hydrogen And New Energy Society, 2016-04)
    To develop a pressurized chemical looping combustor, conceptual design of 0.5 MWth chemical looping combustor was performed by means of mass and energy balance calculations. Based on the conceptual design, reactivity of ...
  • 0.5 MWth 급 케미컬루핑 연소시스템에서 대량생산 산소전달입자를 이용한 천연가스와 합성가스의 연소특성 
    HO-JUNG RYU; DOYEON LEE; HYUNGSEOK NAM; BYUNG WOOK HWANG; HANA KIM; YOO SEOB WON; HO WON RA; SUNG MIN YOON; JEOM-IN BAEK (The Korean Hydrogen And New Energy Society, 2021-04)
    Batch type reduction-oxidation tests were performed to compare combustion characteristic of mass produced particle (N016-R4) for syngas from glycerin with natural gas in a 0.5 MWth chemical looping combustion system. ...
  • 0.5 MWth 급 케미컬루핑 연소시스템에서 대량생산 산소전달입자의 환원반응 특성에 미치는 온도, 압력, 유속 및 용량의 영향 
    HO-JUNG RYU; Doyeon Lee; HYUNGSEOK NAM; BYUNG WOOK HWANG; Hana Kim; YOO SEOB WON; JEOM-IN BAEK (The Korean Hydrogen And New Energy Society, 2021-02)
    Batch type reduction-oxidation tests were performed to check effects of temperature, pressure, gas velocity, and capacity on reduction characteristics of mass produced particle in a 0.5 MWth chemical looping combustion ...
  • 0.5 MWth 급 케미컬루핑 연소시스템에서 대량생산 입자의 고체순환 특성 및 반응 특성 
    Ho-Jung Ryu; SUNG-HO JO; 이승용; DOYEON LEE; HYUNGSEOK NAM; BYUNG WOOK HWANG; 김하나; 김정환; JEOM-IN BAEK (The Korean Hydrogen And New Energy Society, 2019-04)
    Continuous solid circulation test at high temperature and high pressure conditions and batch type reduction-oxidation tests were performed to check feasibility of a 0.5 MWth chemical looping combustion system. Pressure ...
  • 0.5 MWth 급 케미컬루핑 연소시스템의 공기반응기 고체 체유량에미치는 조업변수의 영향 
    Ho-Jung Ryu; Doyeon Lee; HYUNGSEOK NAM; Sungho Cho; Seung-Yong Lee; Baek， Jeom-In (JOURNAL OF ENERGY & CLIMATE CHANGE, 2018-12)
    Effects of gas velocity and solid circulation rate on solid holdup profiles in an air reactor were measured andinvestigated in a 0.5 MWth chemical looping combustion system. The measured solid circulation rate increased ...
  • 0.5 MWth 케미컬루핑 연소 시스템 적용을 위한 신규 산소전달입자의고온 ․ 고압 반응 특성 
    Jung-Hwan Kim; Doyeon Lee; HYUNGSEOK NAM; SUNG-HO JO; BYUNG WOOK HWANG; Baek， Jeom-In; Ho-Jung Ryu (The Korean Hydrogen And New Energy Society, 2018-10)
    To check applicability of recently developed new oxygen carrier for 0.5 MWth chemical looping combustion system, reactivity tests were carried out at high temperature and high pressure conditions. Pressure, temperature, ...
  • 0.5 MWth 케미컬루핑 연소시스템 적용을 위한 산소전달입자의 수력학 특성 및 고체순환 특성 
    HO-JUNG RYU; Jung-Hwan Kim; BYUNG WOOK HWANG; HYUNGSEOK NAM; DOYEON LEE; SUNG-HO JO; JEOM-IN BAEK (The Korean Hydrogen And New Energy Society, 2018-12)
    To select the operating condition of 0.5 MWth chemical looping combustion system, minimum fluidization velocity, transition velocity to fast fluidization and solid circulation rate were measured using mass produced new ...
  • 0.5 TPD 급 수소액화 파일럿 플랜트의 콜드박스 열해석 
    HYOBONG KIM; YONG-JU HONG; HANKIL YEOM; JIHO PARK; JUNSEOK KO; SEONG-JE PARK; Sehwan In (The Korean Hydrogen And New Energy Society, 2020-12)
    Thermal analysis was performed for a cold box of a hydrogen liquefaction pilot plant with 0.5 ton/day capacity. The pilot plant has adopted a hydrogen liquefaction process using two-stage helium Brayton cycle with precooling ...
  • [001] 및 [011] 방향 분극의 압전 단결정 PMN-PZT를 이용한 진동 에너지 수확 특성 
    Kim Jae Eun; Young-Cheol Kim; Kyung Ho Sun (Korean Society for Noise and Vibration Engineering(KSNVE), 2014-11)
    This work investigated the electromechanical performance of a cantilevered vibration energy harvester incorporating the single crystal PMN-PZT, manufactured with the most recent technology of solid-state single crystal ...
  • 0402칩의 무연솔더링 최적공정 연구 
    Junghwan Bang; 이세형; 신의선; Kim Jeong Han; Chang-Woo Lee (The Korean Welding and Joining Society, 2009-02)
    Reflow process conditions were investigated for 0402 electric parts with Sn-3.0Ag-0.5Cu solders. Circle hole shape metal mask with 100 m thickness showed excellent printability. Self alignment abilities were 71% for 1005 ...
  • 0D 모델을 활용한 메탄-수소 혼소에 따른 MILD 연소 및 NOx 배출 특성 해석 연구 
    SOJEONG AN; JINJE PARK; YOUN-SANG BAE; YOUNGJAE LEE (The Korean Hydrogen And New Energy Society, 2022-08)
    Hydrogen with high chemical reactivity and combustion efficiency, is expected to reduce greenhouse gas and CO emission. However, there is a pro- blem of increase in NOx emission due to hydrogen combustion. MILD combus- ...
  • 1 GPa 급 고강도강 다층 용접금속의 저온 충격인성에 미치는 미세조직의 영향 
    Kang Yongjoon; Lee， Chang-Hee (The Korean Welding and Joining Society, 2021-06)
    A 1 GPa class weld metal was prepared by multi-pass welding using a prototype flux-cored wire, and the correla�tion between microstructure and low-temperature impact toughness of the weld metal was investigated. The ...
  • 1 GPa 급 고강도강 용접금속에서의 침상형 페라이트 핵생성 거동 
    Yongjoon Kang; Changhee Lee (The Korean Welding and Joining Society, 2019-02)
    In this study, the nucleation behavior of acicular ferrite in 1 GPa class high strength steel weld metal was investigated. A 1 GPa class as-deposited weld metal specimen was prepared by single-pass welding using a prototype ...
  • 1 kW 고체산화물 연료전지 스택의 내부개질 특성 연구 
    최영재; Jin Soo Ahn; 이인성; Hongyeul Bae; 문지웅; 이종규 (The Korean Hydrogen And New Energy Society, 2017-08)
    This paper presents the performance characteristics of a 1 kW solid oxide fuel cell (SOFC) stack under various internal reforming and fuel utilization conditions. The Research Institute of Industrial Science & Technology ...
  • 1 kWe 급 고체산화물 연료전지 스택에서의 유동 해석 
    KUNWOO YI; YOUNG JIN KIM; HAOYUAN YIN; HYEON JIN KIM; KYONG SIK YUN; JI HAENG YU (The Korean Hydrogen And New Energy Society, 2023-04)
    This study performed the numerical analysis of the internal flow phenomena of 1 kWe-class solid oxide fuel cell (SOFC) stacks with internal manifold type and planar cells using commercial computational fluid dynamics (CFD) ...
  • 1 kWe급 U-형 및 Z-형 SOFC 스택의 내부유동에 대한 수치해석 
    Hao Yuan Yin; Zi Wan Zhang; Kun Woo Yi; Yi Seul Jeong; Young Jin Kim; Hyeon Jin Kim; Kyong Sik Yun; Ji Haeng Yu (대한기계학회, 2025-03)
    본 연구에서는 다양한 유량 조건에 따라 1 kWe급 U형 및 Z형 유동 패턴의 고체산화물 연료전지 스택의 유동 균일성에 미치는 영향을 분석하기 위해 전산유체역학(CFD) 수치 해석을 수행하였다. 결과중에 연료극에서 유량이 낮은 경우 Z형 스택의 유동 균일성이 U형 스택보다 우수한 것으로 나타났다. 반면, 공기극에서 유량이 높은 경우에는 U형 스택이 Z형 스택보다 유동 균일성이 더 뛰어난 것으로 ...
  • 1 kW급 LNG 스털링 엔진 연소실 수치해석 
    Ahn Joon; 이윤식; 김혁주 (Korean Society Of Computational Fluids Engineering, 2011-09)
    The availability of the thermal energy has been deeply recognized recently to encourage the cascade usage of thermal energy from combustion. Within the framework, a 1 kW class Stirling engine based cogeneration system has ...
  • 1 kW급 스털링엔진 고온 열교환기의 Fin 형상 개선 효과 분석 
    Ahn Joon; Seokyeon Kim (대한기계학회, 2017-08)
    본 연구에서는 1 kW급 가정용 열병합 시스템의 원동기로 설계된 스털링 엔진의 고온 열교환기에 대하여 Fin 길이, 간격, 각도 등을 조정한 새로운 형상 및 기존 형상에 대하여 수치해석을 수행하여 형상 개선에 따른 성능 향상을 확인하였다. 형상을 개선하는 과정에서 고려하지 않았던 공기예열기를 포함하여 수치해석을 수행한 결과 실린더 헤드 부분에서 음의 열유속이 발생하는 현상이 관찰되었다. 배가스 ...

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