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이정혜(J.H.Lee),박영승(Y.S.Young),김성규(S.G.Kim),김경근(K.K.Kim) 한국해양대학교 해사산업연구소 2001 海事産業硏究所論文集 Vol.11 No.-
This study is about the thermal design program that calculates temperature distributions of hull and insulation and analyzes the Boil-off ratio on the membrane type LNG carrier in the laden voyage. The calculation model is 1/4 of cargo tank and cofferdam on the No.3 parts of LNG carrier. The mesh number is selected 77,890 mesh for the degree of accuracy and time on the calculation. The lowest air temperature in compartments is calculated as -21.81°C under the USCG condition(Tair=-18°C, Tsw=32°C and the highest temperature in compartment is 38.02°C under the IMO IGC condition(Tair=45°C, Tsw=32°C of the maximum boil-off condition. At now BOR value is 0.1006%/day and it is the lower value than 0.15%/day required by KOGAS.
한영진(Y. J. Han),배성우(S. W. Bae),이정혜(J. H. Lee),최현규(H. G. Choi),오철(C. Oh) 한국해양대학교 해사산업연구소 2003 海事産業硏究所論文集 Vol.14 No.-
The separation of metal chips from a roller is a very important problem in the performance of a food pulverizer because the metal fragments contaminate the pulverized food powder. It was reported that the metal chip separation is facilitated as the temperature of a roller increases from other previous studies, which means that the surface temperature of a roller is a key factor of the metal chip separation. This study is performed to reduce the separation of metal chips from a roller in a pulverizing process. We changed the design parameters such as a surface shape of a roller, a cooling temperature, and a cooling water flowrate for the cooling of a roller. From the experiments, it was found that the changes of the design parameters greatly increased the heat transfer efficiency, which resulted eventually in the reduction of the separation of metal chips from a roller.