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- 저자 : 이경우(K-W Lee) (검색결과 42 건)
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이경우(K. W. Lee),오주원(J. W. Oh),김만응(M. E. Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
In this paper, a tank pressure calculation program when exchanging ballast water is introduced. According to the requirements of "International Convention for the Control and Management of Ships' Ballast Water and Sediments" (hereinafter refer to the "BWM Convention"), a ballast water management system should be fitted in all ships. Meanwhile, as an interim measures, the ballast water exchange method is allowed for the certain periods. To fulfill the requirements of the Convention, where ballast water is exchanged with a pumping-through method, there is a possibility to exceed the design pressure of ballast tank due to the back pressure occurred in the system. In order to avoid the possible structural damage of ballast tanks and to verify the size and number of air pipes, therefore, the calculation to confirm the structural safety of the system should be carried out.
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이경우(K. W. Lee),김만응(M. E. Kim),김유택(Y. T. Kim) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
In this paper, the new concept of fixed high expansion foam fire extinguishing system for ship's engine rooms is introduced. The proposed system using air supply duct to generate foam. Thus, the proposed system has high expansion ratio and enhanced fire extinguishing capability and could reduce onboard installation work.
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이경우(K. W. Lee),김만응(M. E. Kim),이영호(Y. H. Lee) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
In this paper, newly developed method for pipe network analysis is introduced. To ensure the fire extinguishing capability of onboard water-based fire extinguishing system, pipe network analysis shall be carried out at design stage. The method was developed with consideration of characteristics of water-based fire extinguishing system.
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in - line XPS와 AFM을 이용한 유기물의 UV / ozone 건식세정과정 연구
이경우(K. W. Lee),황병철(B. C. Hwang),손동수(D. S. Son),천희곤(H. G. Chun),김경중(K. J. Kim),문대원(D. W. Moon),안강호(K. H. Ahn) 한국진공학회(ASCT) 1995 Applied Science and Convergence Technology Vol.4 No.3
본 실험에서는 실리콘 웨이퍼 위에 photoresist(PR)와 octadecyltrichlorosilane(OTS, CH₃(CH₂)_l7SiCl₃)를 입혀서 UV/ozone 처리를 하였을 때 어떻게 유기물질들이 UV/ozone과 반응하여, 어떻게 표면에서 제거되는지를 in-line으로 연결된 XPS로 분석하고 반응시킨 표면들의 거칠기(roughness)를 AFM을 이용하여 관찰하였다. 실험결과 상온에서 UV/ozone 처리를 했을 경우, PR과 OTS같은 유기물질이 표면에서 산화되는 것을 알 수 있었으나 이들이 제거되지 않고 표면에 그대로 남아있음을 알 수 있었다. 그러나 가열하면서(PR : 250℃, ORS : 100℃) UV/ozone 처리를 하였을 경우 표면에서 산화됨과 동시에 이들 산화물들이 표면에서 제거됨을 알 수 있었다. XPS 분석으로부터 이들의 산화 반응물은 PR과 OTS 모두 -CH₂- , -CH₂O- , =C=O, -COO-를 가지는 것으로 나타났으며, 열에너지에 의해서 이들이 표면에서 제거되는 것으로 나타났다. AFM 분석결과는 상온에서 UV/ozone 처리를 하였을 경우에 표면의 거칠기가 적은 반면, 가열하면서 UV/ozone 처리를 하였을 경우에는 표면의 거칠기가 다소 증가하였다. In this work, photoresist (PR) and octadecyltrichlorosilane (OTS, CH₃(CH₂)_17SiCl₃) on Si were removed by the UV/ozone cleaning method and the surfaces were analyzed byin-line XPS to study mechanisms how the organic films react with UV/ozone and removed from the surface. The surface topographic changes were also observed by AFM. UV/ozone treatments of PR and OTS films at room temperature resulted in the oxidation of the organic surface contaminants, which remained on the surface of the silicon substrates at room temperature. The PR and OTS were oxidized and desorbed very rapidly by UV/ozone treatment at 100℃ and 200~250℃, respectively. From the XPS analyses, it was found that PR and OTS were oxidized to compounds having -CH₂-, -CH₂O-, =C=O, -COO- and desorbed from the surface upon heating. Thd AFM results showed that the UV/ozone treatments of PR and OTS at room temperature did not increase the surface roughness, but the surface roughness was increased at the higher temperature(PR : 250℃, OTS : 100℃).
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이경우(K. W. Lee),김만응(M. E. Kim) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
In this paper, the treatment system fur cargo vapor from oil tanker is introduced. During loading process to empty cargo tank, cargo vapor is produced and the and the principal ingredient of cargo vapor is VOCs(Volatile Organic Compounds). According to the requirements of Regulation 15, Annex Vi, MARPOL, the VOCs from oil tanker shall be returned to shore facilities to treat safely. The shore facilities to treat cargo vapor is called vapor emission control system and the system shall be operated safely to avoid explosion. In this paper, the safe requirements of Korean Administration fur vapor emission control system.
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