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임재혁(Jae Hyuk Lim),한만희(Man-Hee Han),이준연(Jun-Youn Lee),박정순(Jeong Soon Park),엄윤용(Youn Young Earmme),임세영(Seyoung Im) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Prediction of warpage and residual stress in semiconductor chip devices play an important role in chip design. However, there are a few uncertainties in warpage prediction due to unknown patterning material properties, and moisture effect on polymer film. To estimate patterning material properties, we adopt a composite plate analysis and experimental techniques. and measure the warpage of chip after drying at about 250℃ for 30min to remove moisture. In 100㎛, 80㎛ chip cases, finite element analysis result shows a good agreement with measured values, but for 50㎛ and 60㎛ chip cases, there exist a substantial deviation from the measured values due to local deformation from imperfection and defects inherently embedded in the patterning layer and nonuniform bonding between PIcoating and silicon.
가돌리늄(Gd) 첨가에 따른 1A 등급 듀플렉스 스테인레스 강의 미세조직 및 파괴 특성 변화
임재한 ( Jae Han Lim ),정현도 ( Hyun Do Jung ),안지호 ( Ji Ho Ahn ),문병문 ( Byung Moon Moon ) 한국주조공학회 2016 한국주조공학회지 Vol.36 No.1
CD4MCU duplex stainless steel with gadolinium was fabricated as a neutron absorbing material by the air induction melting method. The gadolinium formed intermetallic compounds of Cu-Gd-Fe. There were no significant differences in hardness or ultimate tensile strength between experimental alloys. With the addition of gadolinium the yield strength of the cast alloy significantly increased, from 478.8 ± 11.6 to 514.2 ± 29.9 MPa, whereas elongation of the cast alloy decreased with the addition of gadolinium, from 26.0 ± 7.1 to 7.0 ± 2.5% due to the formation of gadolinium based intermetallic compounds.
임재한(Lim Jae-Han),정재원(Jeong Jae-Weon),송승명(Song Seung-Yong),여명석(Yeo Myoung-Souk),김광우(Kim Kwang-Woo) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.1
In Korea, building energy efficiency rating has been applied to the newly-built apartment building since 2001 and recently the application of this policy was extended to the newly-building office building. To invigorate this governmental policy, it is necessary to introduce the professional accreditation system for evaluation on the building energy efficiency rating. This study aims at deducing the running strategies of this professional accreditation system. In conclusions, we suggested the types of professional accreditation system and the roles of qualified professional were defined by considering the governmental building energy policies, the research trends in building energy efficiency rating of Korea, and the analysis results of professional accreditation system for evaluation on the building energy efficiency rating in UK.
임재찬(Jae-Chan Lim),김재철(Jae-Chul Kim),한성호(Soung-ho Han),이수길(Su-Gil Lee) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월
It’s essential to measure electrical signals of Korea tilting train ""Hanvit 200"" during operation, Because we neep to study operation characteristics of new electric train ""Hanvit 200"" and we want to develop diagnosis system of main circuit of Korea tilting train ""Hanvit 200"". So, we measure electrical signals for developing diagnosis system of ""Hanvit 200"" during operation. We measure voltage and current of the primary winding of main transformer and analyze them. In result, we know that each operation has specific waveform and frequency. In addition, we also measure are currents and are voltage and we know that arc of each situations has specific waveform of pattern.
실내외 베네시안 블라인드가 결합된 창호시스템의 일사획득계수에 미치는 영향
임재한(Jae-Han Lim) 한국생활환경학회 2010 한국생활환경학회지 Vol.17 No.5
Energy performance of glazing systems can be evaluated by U-value and SHGC(g-value, solar heat gain coefficient) through experiment and simulation. Normally the venetian blind has been used to obtain the comfortable day lighting environment and prevent the overheating due to the incident solar radiation. We can anticipate that the exterior shading device is superior to the interior shading device with regard to the cooling load reduction through the fenestration system by blocking the incident solar radiation. This paper aimed to evaluate the effect of interior and exterior venetian blinds on the SHGC of glazing system. SHGC was evaluated through the experiment and simulation. In results, the SHGC was different from each cases according to the location and slat angle of venetian blind. Also significant dependence on the intensity of incident solar radiation through the fenestration system was found in comparison of the SHGC according to the solar incident angle.
오피스건물에서 구체축열시스템의 최적 제어 및 운전 방안
임재한(Jae-Han Lim),이윤선(Yoon-Sun Lee),이겨레(Keo-Re Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
구체축열시스템은 구조체 축열로 인한 시간지연 특성을 고려하여 적절한 운전 제어를 통해 건물에서 최대 냉난방 부하를 저감함으로써 에너지 비용을 낮출 수도 있다. 반면, 국내의 고온다습한 하절기 기후 조건에서는 냉방운전시 방열면에서 결로 발생 위험이 상존하고 있다. 그러므로 본 연구에서는 오피스건물을 대상으로 적용방안을 도출하기 위해 기존 적용 사례 특성을 조사 분석하고, 동적 에너지해석 시뮬레이션을 통해 냉방운전시 결로방지 및 에너지 성능 특성에 대한 분석을 수행하였다. 이를 위해 우선 국내의 구체축열시스템 적용사례 및 국내 건축물 설계기준을 고려하여 오피스건물을 대상으로 건물 모델링을 구성하였고 이를 대상으로 구체축열시스템과 공조시스템의 통합운전인 구체축열 통합시스템을 구성하였다. 구체축열시스템과 변풍량시스템의 통합운전과 구체축열시스템과 외기전담공조시스템의 통합운전의 냉방에너지 성능을 비교하고 외기전담공조시스템 구성에 따른 냉방에너지 성능을 평가하였다.