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이용훈(Y. H. Lee),박기태(G. T. Park),이경환(G. H. Lee),김필환(P. H. Kim),정효민(H. M. Jeong),정한식(H. S. Chung) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Liquefied gas vaporizer means machine to vaporize the liquefied gas as liquid nitrogen(LN₂), liquefied natural gas(LNG), liquid oxygen(LO₂) etc. In the air type vaporizer, the frozen dew is also created by temperature drop (below 273 K) on vaporizer surface. This problem increases as the time progresses and humidity increases. In addition, the frozen dew gradually becomes frost deposit consequently, heat transfer through vaporizer decreases because frost deposit form adiabatic sheet. Because of this reason, recent vaporizer system is installed as parallel type, this vaporizer system needs more expensive installation costs and more space. This study carried out structure analysis on the material of vaporizer along the working fluid flow direction using liquefied super low temperature gas. The experimental study was investigated the heat transfer characteristics and performance on the tube length 4000 ㎜, 6000 ㎜ and 8000 ㎜ of three vaporizer models and was analyzed for evaluating the optimum efficiency on the vaporizer.
지명국(M. K. Ji),박기태(G. T. Park),정효민(H. M. Jeong),정한식(H. S. Chung) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.11
The aim of this research is to analyze the influence of variable motive pressure and driving nozzle position on the performance of ejector. The experiment was conducted in the variation of motive pressure of 1, 2, 3 and 4㎏/㎠ respectively. The position of driving nozzle was varied in difference locations according to mixing tube diameter. The results is show that the suction flow rate of ejector is influenced by the driving nozzle position at the location of I d of mixing tube diameter the performance of ejector gives the best value of suction flow rate.
지명국(M. K. ji),박기태(G. T. Park),정효민(H. M. Jeong),정한식(H. S. Chung) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The aim of this research is to analyze the influence of variable motive pressure and driving nozzle position on the performance of ejector. The experiment was conducted in the variation of motive pressure of 1, 2, 3 and 4㎏/㎠ respectively. The position of driving nozzle was varied in difference locations according to mixing tube diameter. The results is show that the suction flow rate of ejector is influenced by the driving nozzle position at the location of 1d of mixing tube diameter the performance of ejector gives the best value of suction flow rate.