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김성태(S.T.Kim),김명환(M.H.Kim),오철(C.Oh) 한국해양대학교 해사산업연구소 1999 海事産業硏究所論文集 Vol.9 No.-
Recently, With the explosive increase in population and a rapid industry growth, we are confronted with serious water deficiency problem. In Korea, the demand of LNG, as a cheap and clean energy which does not cause an environmental pollution is in creasing every year. However, when it is serviced, a huge amount of cold energy accumulated in LNG is wasted. The goal of this study Is to develop a sea water freezing desalination for using LNG with wasted cold energy. So we have to establish a qualitative and quantitative data regarding the freezing behavior of sea water. In order to obtain this data, the freezing of sea water was performed experimentally around a cooled tube in a rectangular vessel.
김성태(S.T.Kim),남정길(J.G.Nam),최재성(J.S.Choi) 한국해양대학교 해사산업연구소 1998 海事産業硏究所論文集 Vol.8 No.-
In this study it is' reviewed how to induce thermo-dynamically and mathematically the heat transfer coefficient formulas studied & reported for small high-speed internal combustion engines mainly. And using these formulas it is ensure to fit the calculation value with obtained combustion pressure data through experiment from low speed large marine diesel engine. Also it is analyzed that the measured temperatures of cylinder head, liner and piston crown those of the heat transferred wall area in combustion chamber with load variation. Accordingly, the characteristic of heat transfer has been grasped by analyzing variously a heat loss through combustion chamber wall which influence on confidence & economical efficiency belongs to basic items for internal combustion engines.
김치생산용 알타리무 전처리 가공시스템 개발(I) - 무청·뿌리끝부 절단장치 -
민영봉,김성태,강동현,정태상,나우정,Min Y.B.,Kim S.T.,Kang D.H.,Chung T.S.,La W.J. 한국농업기계학회 2004 바이오시스템공학 Vol.29 No.5
To establish a Altari radish pre-processing system far kimchi, the leaves and root tail of the Altari radish cutting de-vices were developed. The cutting resistances depend on the edge angles, oblique angles and cutting speeds were measured and analyzed. The experiments were performed to reveal the optimal conditions that showed the minimum cutting resistances acting on the materials. As the results, the optimum conditions that acting on the leaves were at edge angle $25^{\circ}$, oblique angle $40^{\circ}$ and cutting speed 0.5 m/s, and those acting on the root tails were at edge angle $20^{\circ}$, oblique angle $30^{\circ}$ and cutting speed 0.5 m/s, respectively. Considered a safety conception, the oblique angle of the leaves cutting device was adjusted as $20^{\circ}$, and then the cutting efficiencies of the both devices at these conditions were showed perfect performances.