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22.9㎸ 초전도케이블/한류기의 국내 배전계통 적용을 위한 설계사양 고찰
이승렬(S.R. Lee),박종영(J.Y. Park),윤재영(J.Y. Yoon),양병모(B.M. Yang),이승엽(S.Y. Lee),원영진(Y.J. Won),이병준(B.J. Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
22.9㎸ HTS(High Temperature Superconducting) cable and SFCL(Superconducting Fault Current Limiter) will be installed to Icheon 154㎸ substation for real distribution power system operation in 2010. This paper proposes CLR (Current Limiting Resistance) specification of the SFCL and fault current condition fo the HTS cable for applying to Korean power system.
스트란드형 유리섬유/비닐에스테르 수지 복합재료의 특수환경에 대한 내구성 시험
이승렬(S. Y. Lee),박창호(C. H. Park),문창권(C. K. Moon) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The effect of various environmental conditions on durability of E-glass fiber/vinylester resin composites has been investigated using tensile test specimen of strand type. Tensile strength decreased with the immersion time in all environmental conditions. The extent of decreasing was more serious in case of alkaline condition than deionized water condition regardless temperature condition. we found that the decrement of tensile strength during the immersion time in various environment conditions was mainly caused by the degradation of interface between glass fiber and vinylester resin and damage of glass fiber surface.
노윤찬,이승렬,윤영균,남기대 ( Y . C . Ro,S . Y . Lee,Y . K . Yun,K . D . Nam ) 한국공업화학회 1994 공업화학 Vol.5 No.5
새로운 기능성을 갖는 sodium monogtycerol α-sulfonated alkanonate류에서 소수성 부분의 알킬기의 탄소수에 따른 세정력을 비교한 결과 C_(16)>C_(18)>C_(14)>C_(12)의 순으로 나타났고, 이들 중 세정력이 가장 우수한 sodium monoglycerol α-sulfonated hexadecanonate는 무공해 세정제로서 기대성이 있는바 현재 공업적으로 대량 사용하고 있는 sodium α-sulfonated alkanoic acid methyl ester와 sodium alkyl benzene sulfonate를 상대 비교한 결과, 보다 우수한 세정력을 나타내며 공업적 응용성에 기대성이 크다. The detergencies of these new functional anionic surfactants, sodium monoglycerol α-sulfonated alkanoates, were investigated and compared with those of two commercial surfactants, that is, sodium α-sulfonated alkanoic acid methyl ester and sodium alkyl benzene sulfonate. According to the variation of the hydrophobic alkyl chain length, the order of detergency was shown to be C_(16)>C_(18)>C_(14)>C_(12). From the comparision experiment for the detergency and the various fundamental properties of two other surfactants, it was found that sodium monoglycerol α-sulfonated hexadecanonate has the most outstanding characteristics of detergency. Possibly this result shows light on its industrial application as a nonpolluting detergent.
김상춘,김태영,이승렬,노승호,남기대 ( S . C . Kim,T . Y . Kim,S . Y . Lee,S . H . Roh,K . D . Nam ) 한국공업화학회 1994 공업화학 Vol.5 No.4
본 연구에 사용된 비이온성 계면활성제는 1-O-oleoyl glycerol, 2-O-oleoyl-myo-inositol 및 methyl 2-O-oleoyl-α-D-glucopyranoside였다. 이들 3종류의 비이온성 계면활성제에 대한 용액성질과 가용화과정은 상평형에 의하여 관찰하였다. 그 결과 계면활성제/물 2성분계와 3wt.%계면활성제/물/cyclohexane 3성분계는 각각 온도에 의존하는 것으로 나타났다. 계면활성제/물/cyclohexane계에서 3상영역은 27℃∼32℃, 36℃∼45℃와 38℃∼52℃의 온도 범위에서 각각 나타났으며 3상영역의 부근에서 물 및 오일의 가용화가 최대가 되었다. 계면활성제/물계의 온도변화에 따른 상거동을 살펴 본 결과 1-O-oleoyl glycerol은 hexagonal 액정상이, 2-O-oleoyl-myo-inositol 및 methyl 2-O-oleoyl-α-D-glucopyranoside는 lamella형태의 액정상이 관찰되었다. 1-O-oleoyl glycerol, 2-O-oleoyl myo-inositol and methyl 2-O-oleoyl-α-D-glucopyranoside were used as surfactants in this study. The solution properties and solubilization process of those nonionic surfactants were examined by the phase equilibria. As a result of this study, we have found that phase behavior of two component systems of surfactants/H₂O/cyclohexane depends on temperature respectively. The three phase regions of three component systems appeared in the temperature range of 27℃∼32℃, 36℃∼45℃and 38℃∼52℃ and solubilization of water and oil was high in those three phase ranges, As the temperature was varied in the two component systems, liquid crystals of hexagonal were observed to in the case of 1-O-oleoyl glycerol, and liquid crystal of lamella types were observed in the case of 2-O-oleoyl myo-inositol and methyl 2-O-oleoyl-α-D-glucopyranoside.