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지하철 공기청정을 위한 2유체노즐형 자동세정 공기청정 시스템 개발에 관한 연구
안영철 ( Y. C. Ahn ),이재근 ( J. K. Lee ) 한국분무공학회 2004 한국액체미립화학회지 Vol.9 No.3
N/A The removal of the dusts in the subway stations, tunnels, factories and buildings becomes issue for comfortable indoor and outdoor conditions. There has been used an automatic self-cleaning filter system to collect the dusts. In general, the collected particles are removed by water spray nozzles. The new design for improving the cleaning efficiency of collected dusts and reducing the supplied water is the concept of the plane array of demister filters and the twin-fluid nozzle for mixing compressed air and water in the automatic self-cleaning filter system. Results show that the cleaning efficiency of twin-nozzle filter systems is 99.1%, compared to 47% in the conventional filter system. Therefore the automatic self-cleaning filter system using twin-fluid nozzle filter systems reduces water supplied in the filter system, and increases cleaning efficiency and drying efficiency.
김길태 ( G. T. Kim ),안영철 ( Y. C. Ahn ),이재근 ( J. K. Lee ),성창모 ( C. M. Sung ),( Nirupama Kattamuri ) 한국분무공학회 2003 한국액체미립화학회지 Vol.8 No.2
N/A Polymeric fibers with nanometer-scale diameters are produced by electrospinning method. When the electrical forces at the surface of a polymer solution or melt overcome the surface tension, then electrospinning occurs and nanofibers are made. Polyethylene oxide(PEO) have been electrospun in our laboratory. Electrospun PEO fibers are observed by scanning electron microscopy or transmission electron microscopy. In this study, the average diameter of the electrospun fibers decreases with decreasing PEO concentration and increasing electric field strength. The optimal conditions for pruducing uniform PEO 100 ㎚ fibers are the 10 wt% PEO concentration at a voltage 25 to 30 ㎸ and a distance of 10 ㎝ from tip to collector.